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User`s Manual - Curlin, Inc.

1. 43 DBD OOA SAFET CHOGCGK E RESTRAINT Chott Wahine Val ENGAGE 20108 aie en 003 f 2 O 8 9184 pe ES Es Gil ms STOS o 152 68 O E 0 S Q O eee Weg e EE Ee LRD 7 OOO D el Co SE fem o 47 O 46 60018130 Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc PARTS LIST CONTROL PANEL continued Serco 6001710v1 6001710v2 6001710v3 6001710v4 6001710v5 6001710v6 6001710v7 6001710v8 Kelley 6001801v1 6001801v2 6001801v3 6001801v4 6001801v5 6001801v6 6001801v7 6001801v8 7 Overload relay 12 18 Amp Pushbutton mom NEMA 4 4x 13 6000477 OL101 6000478 OL101 6000506 PB911 PB912 Body mounting collar 6000515 PB911 CH 3 Reciangle base
2. E Fig 31 6 SLSC CYLINDER j PS IS 450PS R PORT E PORT AUX RETRACT EXTEND 8 SAE 8 SAE SV H pt 6 e gt lt lt RV2 5000PSI CH Sg SV2 aay JE lt RV1 800PSI D e 2 7 GPM LI KA LI 34 6001813Q Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc December 2013 HYDRAULIC VALVE CROSS SECTION Fig 32 CV1 R port ZA retract PS1 adjustment screw RV2 5000 PSI do not adjust ISCH RV1 800 PSI E port extend December 2013 6001813Q Automatic Wheel Restraint 35 2013 4Front Engineered Solutions Inc POWER UNIT J BOX Fig 33 See J box drawings or User s Manual for interconnection and heater installation details Detail A PRS2 PS1 Pilot sv2 SV1 NC tacite Pull to dump pressure to tank when Wall mounted on thermostat 061 787 AA Power Unit J Box Part Number Application Wall mounted 6012068 No heater motion alert 061 619 6012019 120VAC with heater Terminals 6012069 208 600VAC with heater E ES 36 To be mounted on outside wall on the same side as the chock unit 60018130 Automatic Wheel Restraint 20
3. 35 Power Unit J Box 36 Parts LiStiis ienna ae ea EEA E 40 Warranty Information 51 Distributor Information 52 INTRODUCTION Welcome and thank you for buying this wheel restraint from 4Front Engineered Solutions Inc This User s Manual contains information that you need to safely install operate and maintain the wheel restraint It also contains a complete parts list and information about ordering replacement parts Please keep and read this User s Manual before using your new wheel restraint This manual covers the Serco SAFETY CHOCK and the Kelley SURFACE CHOCK wheel restraints SAFETY SIGNAL WORDS You may find safety signal words such as DANGER WARNING CAUTION or NOTICE throughout this User s Manual Their use is explained below This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible death or injury ADANGER Indicates an imminently hazardous situation which if not avoided will result in death or serious injury Indicates a potentially hazardous situation which if not avoided could result in death or serious injury 2 6001813Q Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc Indicates a potentially hazardous situation which if not avoided may result
4. ADJUSTMENTS Use these instructions to adjust the wheel restraint PROXIMITY SENSORS PRS1 AND PRS2 Two proximity sensors are used to sense the various positions of the wheel restraint The sensors are solid state proximity sensors which close an electrical circuit when they sense the presence of a steel target The locations of these sensors are shown below To access these sensors first remove the cover at the rear of the chock rail by removing the two screws which hold it into place Before adjusting either PRS1 or PRS2 be sure that the pivot carriage is fully retracted Adjust the position of the proximity sensors using two 15 16 open end wrenches to loosen the holding nuts Then adjust the proximity sensor inward or outward as shown and tighten the nuts to 11 ft lbs to secure the sensor The face of the proximity sensor should be 1 16 from the target plate ga TS M Fig 27 1 16 PT N N TAVA TO SFT IN VQ PRS1 E AL PRS2 E Carriage stop bar Pivot carriage December 2013 60018130 Automatic Wheel Restraint 31 2013 4Front Engineered Solutions Inc ADJ U STM E NTS continued Use these instructions to adjust the wheel restraint HYDRAULIC PRESSURE SWITCH PS1 When the wheel restraint encounters an obstacle such as a vehicle wheel the hydraulic pressure rises This causes the pressure switch PS1 to open an electrical contact The pressure switch is factory set at approximately 450
5. ENGAGING VEHICLE Fig 11 bg a 1 When the wheel restraint is stored the outside GREEN S D J light and inside RED light will be on O Oo 2 To secure the vehicle at the dock press the ENGAGE ee button The outside lights immediately change from Green GREEN to RED and the chock housing will start to move away from the wall The chock housing will continue moving outward until the sensing roller contacts the rear DT wheel of the vehicle 3 When the sensing roller contacts the rear wheel of the vehicle the chock arm will extend out of the housing until it is placed in front of the rear wheel When the chock is fully extended the chock housing will reverse and move the wheel chock back to firmly engage the wheel The inside lights will change from RED to GREEN The vehicle is now safe to load or unload Fig 12 Red WARNING E When the wheel restraint has engaged a wheel the hydraulic pump will automatically start and maintain engagement pressure against the wheel if the vehicle moves Disconnect power to the control panel or turn the circuit breaker to OFF before attempting to make adjustments Failure to keep clear may result in personal injury Fig 13 December 2013 600
6. NORMAL OPERATING SEQUENCES HOME Carriage fully retracted stored STEP 1 Initial departure STEP 2 Carriage extending STEP 3 Carriage retracting STEP 4 Chock fully engaged tire gripped STEP 5 Carriage extending releasing STEP 6 Carriage retracting releasing TNF Truck not found RESTRAINT OVERRIDE Restraint override condition 26 60018130 Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc December 2013 Fig 23 120V 1PH 60HZ CB FU TO BE SUPPLIED BY OTHERS ELECTRICAL SCHEMATIC RESTRAINT SUPPLY BCPD CB FU 25AMP MAX an PANEL FLA 16 4AMPS o p4 Wien SCCR 5KA ui M1014 OL101 an RESTRAINT TUT WFO OT F HP MOTOR a OR N 16 FLA al roi Luna 3450RPM JUMPER y 14 sl PO 164 G TERMINAL BLOCK STRIP AS BUILT LAYOUT PER PANEL FU1002 IB1 o LI CND LUG N 2 e FU109 12 18 19 21 AIS H3q4H2 AIR 22 D23 R1 FU1005 240 120V PR XE R2 2 SEC 7 SA Ge x2 X1 li RC RC 24 DN 7 8 20 NEU 9 13 LEGEND 14 PANEL WIRING EN FIELD WIRING BY OTHERS 6B PC BOARD TRACES svt NOTE STANDARD TERMINALS WILL ACCEPT 12AWG STRANDED WIRE MAXIMUM WIRE COLOR GAUGE NFPA unless otherwise specified 208 600VAC 14 BLK 120VAC 16 RED 24VAC 16 RED B
7. 5 Reserved 6 TNF Alarm pulsed output optional 7 Motor 8 Motion Alarm pulsed output 9 Leveler Interlock restraint engaged and door opened if applicable Trouble Code Trouble Definition Did not lose LS1 LS2 and PS1 after leaving the home position Possible obstruction encountered while retracting or an LS failure PS1 failed open or carriage has traveled to far end of the rail Motor run timeout exceeded LS present while carriage locked or moving forward Loss of LS s while restraint is home December 2013 6001813Q Automatic Wheel Restraint 25 2013 4Front Engineered Solutions Inc PLC D IAG NOSTICS continued OPERATING MODE PLC LED DISPLAY CONTROLLER FAULT CONDITIONS RUN LED Green O Application not executed Controller is in RUN mode F Controller is in STOP mode or execution fault HALT ERR LED Red D OK Internal faults watchdog etc F Application not executable or execution error HALT RUNS O ERR SS ON STATS CA ooo gt 000 ooo 0 o O amp Telemecanique Twido PLC model no TWDLCAA24DRF Compact base unit 230V AC with 14 24V DC 10 out 2A relays Screw terminal blocks non removable EE Sat cu O 1 3 4567891 PNG VO 1 2 39014 5 6 7Y 8 Ya 9 DODOOODOLOOLOR VH LEGEND O LED OFF LED ON F LED Flashing E LED ON or OFF either condition may be present during the course of given sequence LED Indicators
8. 1 60 days after the date of initial shipment by 4Front or 2 the date of installation of the WHEEL RESTRAINT by the original purchaser provided that the owner maintains and operates the WHEEL RESTRAINT in accordance with this User s Manual In the event that this WHEEL RESTRAINT proves deficient in material or workmanship within the applicable Limited Warranty period owner shall so notify 4Front and 4Front will at its option 1 Replace the WHEEL RESTRAINT or the deficient portion s thereof without charge to the owner or 2 Alter or repair the WHEEL RESTRAINT on site or elsewhere without charge to the owner This Limited Warranty does not cover any failure caused by improper installation abuse improper operation negligence or failure to maintain and adjust the WHEEL RESTRAINT properly Parts requiring replacement due to damage resulting from vehicle impact abuse or improper operation are not covered by this warranty 4FRONT DISCLAIMS ANY RESPONSIBILITY OR LIABILITY FOR ANY LOSS OR DAMAGE OF ANY KIND INCLUDING WITHOUT LIMITATION DIRECT INDIRECT CONSEQUENTIAL OR PUNITIVE DAMAGES OR LOST PROFITS OR LOST PRODUCTION arising out of or related to the use installation or maintenance of the WHEEL RESTRAINT including premature product wear product failure property damage or bodily injury resulting from use of unauthorized replacement parts or modification of the WHEEL RESTRAINT 4Front s sole obligation with regard to a WHEEL RESTRAIN
9. 12L12F YLINER 12L18F LABEL KEEP CLEAR SLSC ABEL NO STEP SLSC LABEL SERCO BRAND LABEL KELLEY BRAND SERIAL TAG MAIN ARM PIN CYLINDER PIN OLLER ARM PIN ENSOR ARM ADJUSTING PIN ARRIAGE GUIDE COLLAR LIP COVER OLD DOWN BAND SPACER HIELD ASSEMBLY ENSOR ARM ASSEMBLY SLSC NOT SHOWN P 1 4 X 1 1 2 ZINC PW TYPE A 1 BOLT 2 OD ZINC OLLER SENSOR ARM SLSC ELDMENT SENSOR ARM SLSC HSS 1 2 13 UNC X 2 5 P 14X2 LSC RAIL JUNCTION BOX 3 4 10 X 2 1 4 HEX BOLT 4 10 NYLOC NUT 1 1 4 CAM FOLLOWER BEARING NYLON LOCK NUT 1 2 20 UNF CAM FOLLOWER COVER SHSBH 1 4 20 UNC X 1 1 4 ZP IHHTS 12 0 75 AM ASSEMBLY NOT SHOWN HOCK LOCK ASSEMBLY NOT SHOWN CHOCK ARM ASSEMBLY NOT SHOWN CREW FLBH 1 4 20X 3 4 AIL END ASSEMBLY RONT RAIL EXTENSION REMOTE ROLLER GUARD STANDOFF OPTIONAL REMOTE ROLLER GUARD OPTIONAL KNOCKOUT PLUG Included with item 81 Included with item 82 tIncluded with item 80 Included with item 62 Included with item 30 Included with item 63 Quantity 10 EN keck Ww al Z o al q A O N Wa O wm E PoE LZE LA gt U wm a o tom 46 47 48 aor sot 57 58 59 6o Eeri EE 63 64 65 6 67 6 69 7o WER 72 cm EN 75 76 RA O U O olu Q gt CO CO al 9 gt O m A December 2013 60018130 Automatic Wheel Restrain
10. ALARM Ol 6B al y REMOTE OJ 21 CH STOP CB une 2081 S LOAD Oz tio GFI SWITCH O 23 LEV 8590 oja jd CND LUG no en d hat po B TERMINAL MARKERS TO BE L en FACTORY DEFAULTS PLOTTED PLASTIC TABS 3 R r 1 CHOOSE TAPS TO MATCH SPLICE HEATER ELEMENT APPLICATION TO BE 623 202 i CONFIGURED BY 4FRONT AS TAN Gei REQUIRED l WE A LEGEND EE EE EEN J FACTORY WIRING E J VOLTAGE RAJI HR FIELD WIRING BY OTHERS THERMOSTAT ASSEMBLY O DEFAULT TAP 061 787 H1 H2 H1 H3 H1 H4 H1 H5 X1 X2 X1 X3 X1 X4 208 1 7 240 416 480 600 99 120 130 240 1 5 EE COLOR CAUCE e 230 400 460 575 95 115 125 400 0 9 ee ELE a OPTIONAL 208 600VOLT BLACK 14GA 220 380 440 550 91 110 120 480 0 7 120VAC RED 16CA SS STOP PUSHBUTTON STATION LOCATED ON 208 364 420 500 85 100 110 600 0 6 24VAC RED BLK 16GA 120 24VAC NEUTRAL WHT 16GA NOTE JUMPER WIRE TERMINALS 21 AND 22 IF REMOTE STOP TRANSFORMER TAP CHART FLA CHART 24VDC BLUE 18GA PUSHBUTTON STATION IS NOT INSTALLED MAY ALSO BE 24VDC OVDC BLU WHT 18GA 12VOLT AC OR DC PURPLE 18GA 12VOLT PUR WHT 18GA TERMINATED OR JUMPERED IN MAIN CONTROL PANEL December 2013 6001813Q Automatic Wheel Restraint 39 2013 4Front Engineered Solutions Inc PARTS LIST WHEEL RESTRAINT A WARNING To ensure proper function durability and safety of the product only replacement parts that do not interfere with the safe normal operation of the
11. PSI However if the chock carriage reverses before the chock fully extends the pressure may be increased by turning the adjusting wheel clockwise If the chock fully extends and does not reverse but the pump still runs then the pressure switch is set too high not allowing the electrical contact to open Decrease pressure by turning the adjusting screw counter clockwise HYDRAULIC POWER UNIT SETUP PROCEDURE 1 A1500PSIfull scale 2 1 2 liquid filled hydraulic pressure gage is furnished with the power unit 2 Loosen the jamb nut on the Relief Valve RV1 Turn the hex set screw adjustment CCW 2 turns Note you are decreasing the amount of force on a spring A small amount of tension must be felt on the spring do NOT allow the adjusting screw to fall out The SLSC must be in the stored position for these adjustments PLC inputs for LS 1 and LS 2 should be ON 3 Usinga 2 Phillips screwdriver adjust the pressure switch via the plastic screw on top of the switch Set the pressure to approx 550 PSI as indicated on the scale on the front of the switch 4 Turn and hold the LIGHTS ONLY selector switch CW and press RELEASE The motor will run and the gage will indicate relief pressure If the gage pressure is less than 450 PSI slowly turn the relief pressure adjustment CW and stop when the gage indicates approx 475 PSI If the gage pressure is greater than 450 PSI turn the relief valve RV1 CCW one turn then relieve system pre
12. REMOTE STOP PUSHBUTTON STATION IS NOT INSTALLED PB920 MAY BE TERMINATED OR JUMPERED IN oo MAIN CONTROL PANEL REMOTE OPTION 12 RC JUMPER TO ENABLE CHOCK SNUGGING INPUT SIGNALS OUTPUT SIGNALS SO 9 9 O OVERRIDE 0 RED 1 AMBER Cort 0 1 2 3 4 5 6 7 8 910111213 d GC 2 AMEER _ 3 PS1 3 OUTSIDE LIGHT GREEN am Ao EXTERIOR I retemocanique 4 NOT USED 4 SV1 SV2 LAMP PACKAGE 5 NOT USED 5 NOT USED 8 32V LED 6 ENGAGE 6 HORN OPTION 7 RELEASE 7 MOTOR DV1025 8 NOT USED 8 LEVELER STORED a 3 111025 9 DOOR CLOSED 9 Door interlock Sr CR1009 7 NE lt 10 LEVELER STORED O TN R 11 VSL FAULT 1P2525 PEN 12 SNUGGING GE 13 STOP CR1009 8 11027 TH Hz gt Can DONO O 1 2 3 4 5 6 7 8 9 loog DDODDODODDDODDDODO 9 J RE O FU1018 o oo DV1029 ai 14 O 254 oW o SH ei oL101 M1014 RECTIFIER 68 e LT1006 D EE 4 CR 95 X96 An Ja 061 619 N AHIOST LT1007 MO M1014 6A 6A FU1O11 sl Hz SL Tr svi svt sv2 N oo POWER UNIT J BOX LT1008 19w o A EN LEGEND CR1009 19w PANEL WIRING A1 A2 D dree 0 T eegen FIELD WIRING BY OTHERS PC BOARD TRACES 30 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc Do not service this product unless you have read and followed the Safety Practices Warnings and Operation instructions contained in this manual Failure to follow these safety practices could result in death or serious injury
13. Valve Primary relief pressure is now set Use these instructions to adjust the wheel restraint SENSOR ROLLER ARM ADJUSTMENT The distance from the front of the sensing roller to the chock surface is initially set at 32 See Fig 29 If the chock drags on the front of the wheel or does not properly release the wheel increase the distance If the tip of the chock strikes the forward tire of tandem axles then decrease the distance 32 To adjust the distance of the sensing roller 1 Follow step 17 on page 12 of the startup instructions With the test bar locked against the wall press stop Mark a line on the driveway directly below the face of the chock arm 2 Measure the distance from the front of the sensing roller to the line under the chock 3 To change the distance use the adjusting bolts to move the roller arm pivot pin as shown in the drawing below When adjustment is complete secure the position of the adjusting bolts with the jam nuts Do not overtighten the adjusting bolts 4 To restore the chock press the RELEASE button The u from wheel chock carriage will return to the stored position EE December 2013 6001813Q Automatic Wheel Restraint Roller away 2013 4Front Engineered Solutions Inc 33 HYDRAULIC SCHEMATIC
14. stored position ai and motor stops OPERATIONS Returns system from lights only RESTRAINT OVERRIDE LIGHTS ONLY to normal operating condition Motion alarm sounds I RESTRAINT OVERRIDE LIGHTS ONLY Turn clockwise spring return Turn selector to right and release Power is cut off from motor control circuit e Power is supplied to outside RED light and inside GREEN and AMBER lights RESTRAINT STOP Press in e Power is cut off from motor control circuit Pull out to resume normal operations December 2013 60018130 Automatic Wheel Restraint 5 2013 4Front Engineered Solutions Inc INSTALLATION INSTRUCTIONS Before installation read and follow the Safety Practices on page 3 Failure to follow these safety practices could result in death or serious injury READ AND FOLLOW THE OPERATION INSTRUCTIONS IN THIS MANUAL BEFORE OPERATING THE WHEEL RESTRAINT If you do not understand the instructions ask your supervisor to teach you how to use the wheel restraint Improper installation of the wheel restraint could result in death or serious injury to dock workers or other users of the wheel restraint Place barricades around pit on dock floor and drive while installing maintaining or repairing the wheel restraint Be certain bystanders in the driveway stand clear when the wheel restraint is operated Be certain to follow the installation instructions in this manual INSTALLATION INSTRUCTIONS 1 L
15. the dock and a backing vehicle All electrical troubleshooting and repair must be done by a qualified technician and meet all applicable codes Before doing any electrical work make certain the power is disconnected and properly tagged or locked off Before doing any welding make certain the power is disconnected and properly tagged or locked off If it is necessary to make troubleshooting checks inside the control box with power on USE EXTREME CAUTION Do not place fingers or uninsulated tools inside the control box Touching wires or other parts inside the control box could result in electrical shock serious injury or death Pressing the STOP button at any time will stop movement of the chock December 2013 6001813Q Automatic Wheel Restraint 3 2013 4Front Engineered Solutions Inc COMPONENTS AND SPECIFICATIONS The main components of the wheel restraint are shown below See the Parts List for specific part numbers Fig 2 Red light Amber light Green light Engage Fig 1 Chock housing oe Restraint override lights only Stop Control panel Arm spring Arm spring adjustment Arm latch Lock assembly Chock arm Carriage guide pin Hydraulic cylinder Rail extension SE o Nose cone 4 60018130 Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc COMPONENTS AND SPECIFICATIONS continued Control Panel NEMA 1
16. 13 4Front Engineered Solutions Inc December 2013 NO HEATER 6012068 Fig 34 FIRST COLUMN OF TERMINALS IS RESERVED FOR FIELD USE JUNCTION BOX TO CONTROL PANEL POWER UNIT J BOX continued r LABEL USING PLOTTED PLASTIC TABS TEST PORTS THIS LEAD NOT USED IN SINGLE PHASE APPLICATIONS LT DP ac e Si OJ Ti O MOTOR O T2 O EN M O T3 O i i O R1 _Jo lt gt Rares 4 PRSI CARRIAGE RETRACTED AND HOOK RETRACTED SENSORS switcy 4 lolre Olot e open LOCATED ON RESTRAINT L JUMPER TO BE o r3 Jo oyo PS1 PLACED IN LEFT HAND COLUMN AS SHOWN Send O RC OL svi O sv1 SOLENOID A le O sv1 OA o SV 2 NEUTRAL OJ N O cHock MOTION O 64 Of Fa ALARM EE Sa ee a NC OPTIONAL REMOTE lo an O aTo 6002307 REMOTE STOP PUSHBUTTON STATION LOCATED ON E sea en em nn _J OUTSIDE WALL LEGEND NOTE JUMPER WIRE TERMINALS 21 AND 22 IF REMOTE STOP PUSHBUTTON STATION IS NOT INSTALLED MAY ALSO BE FACTORY WIRING TERMINATED OR JUMPERED IN MAIN CONTROL PANEL TERMINAL MARKERS TO BE PLOTTED PLASTIC TABS iz FIELD WIRING BY OTHERS WIRE COLOR GAUGE unless otherwise specified 208 600VOLT BLACK 14GA 120VAC RED 16GA 24VAC RED BLK 16GA 120 24VAC NEUTRAL WHT 16GA 24VDC BLUE 18GA 24VDC OVDC BLU WHT 18GA 12VOLT AC OR DC PURPLE 18GA 12V
17. 18130 Automatic Wheel Restraint 15 2013 4Front Engineered Solutions Inc OPERATING INSTRUCTIONS continued RELEASING VEHICLE 4 Torelease the vehicle from the dock press the RELEASE button The inside lights immediately change from GREEN to RED and the chock housing will begin to move forward When the chock is clear of the wheel the housing will reverse the chock arm will retract into the housing and continue to move toward the wall 5 When the housing has moved back to the wall the outside lights will change from RED to GREEN The vehicle is now free to leave FOR VEHICLES WHICH CANNOT BE ENGAGED If the configuration of the vehicle wheels prevents proper engagement of the wheel chock the carriage may return to the home position and report a Vehicle Not Found condition This condition is reported by flashing the inside RED and AMBER lamps Manually chock the vehicle wheels and then rotate the RESTRAINT OVERRIDE LIGHTS ONLY selector switch to initiate a lights override condition The outside RED lamp and inside GREEN and AMBER lamps will illuminate The vehicle is now safe to load unload When loading unloading is complete remove wheel chocks and press RELEASE The outside GREEN lamp and inside RED lamp will illuminate Fig 14 Fig 15 Fig 16 ete y Wheels chocked 16 6001813Q Automat
18. 2 Solid state PLC Programmable Solenoid Valves 1 Normally open poppet 1 Normally Logic Controller U L approved panel and components closed poppet 125V continuous duty 0 5 amp automatic motor starter thermal overload resettable control circuit breaker Pump Single stage gear pump 2 7 GPM 10 2 LPM primary relief valve factory set at 800 PSI Proximity Sensors NEMA 6P normally open with LED pilot light Reservoir Capacity 2 7 Gallons 10 2 Liters Pressure Switch Adjustable factory set to 450 PSI Hydraulic Fluid An all weather hydraulic fluid with a viscosity of 15 cSt at 40 C 100 F such as Shell Tellus T 15 Mobil Motor NEMA Standard T E N V 56C frame 1 HP 75 kW Aero HFA 49011 Exxon Univis Grade J13 Texaco Aircraft single or three phase Oil 1554 U S Oil Co Inc ZFI 5606 Low Temp ELECTRICAL SYSTEM OPERATION The following describes the operation of the Electrical System when the controls are activated ENGAGE Press in Motor starts and hydraulic cylinder extends Sensing roller engages rear vehicle wheel e Pressure switch trips Fig 3 Chock arm extends Hydraulic cylinder retracts Chock engages wheel and motor stops Motion alarm sounds RELEASE Press in Motor starts and hydraulic cylinder extends Sensing roller engages rear vehicle wheel e Pressure switch trips D Hydraulic cylinder and chock arm retract Pay Chock housing returns to the
19. AC VDC 18 VIO 12V COM 18 VIO WHT December 2013 60018130 Automatic Wheel Restraint 29 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC continued Fig 26 FU902 Control Panel e o 7 RPRSI R1 OPTIONAL SENSOR DETAIL CONNECT DEVICES AS REQUIRED PER IF Fr e JUMPER IF NOT USED LL YV RC DOOR CLOSED o RC RC R PS1 450 PSI R3 _ RC FE o NOT USED 625 203 POWER UNIT J BOX LIGHT OPERATE na LEVELER STORED PHOTOEYE E ov CH BLU O Lo BRNO OF BLK R1 LS SERCO STYLE DEVICE SHOWN R2 i CONSULT FACTORY FOR ADDITIONAL OPTIONS R3 18 i OVERRIDE SS905 NORMAL OVERRIDE oX0 ENGAGE 2 1 PB911 mee 4 3 RELEASE PB912 CS og A STOP 22 21 PB918 KR T 7 1 ell OPTIONAL 22 21 REMOTE STOP PB LOCATED ON OUTSIDE WALL q NOTE JUMPER WIRE TERMINALS POWER UNIT J BOX 21 AND 22 IF
20. Automatic Wheel Restraint Surface Mounted This manual applies to SLSC and Surface Chock wheel restraints manufactured beginning December 2013 with the serial number 61098919 and higher Geer sM Do not install operate or service this product unless U se r S a n u a you have read and understand the Safety Practices Install ation Operations Warnings and Installation and Operating Instructions contained in this manual Failure to do so could result Maintenance and Pa rts in death or serious injury Part No 60018130 TABLE OF CONTENTS Introducton ss 2 Safety Signal WordS island 2 Safety PralliCES usina nani 3 Components And Gpecfcations 4 Electrical System Operation 5 Installation Instructions gees keeekkodagegoekdech eet ege as 6 Installation Drawing 6 Startup Instructions 10 Trailer Presence Sensor Option 12 Thermostat for Heater Option 13 Operating Instructions 14 Engaging Vehicle RD RREO sun 15 Releasing Vehicle us 16 Manual Operation using Jog Mode eaaaeseeeen 17 Planned Maintenance 18 Emergency Release Procedure 19 Troubleshooting Guide 21 PLC Diagnostics EE 25 Electrical Schematic coococccocicocicocococococoncoonnonnnrrnnonnos 27 Pato EE ie EE 31 Hydraulic Schematic E 34 Hydraulic Valve Cross Section
21. CE To ensure the continued proper operation of your wheel restraint perform the following planned maintenance procedures Do not service this product unless you have read and followed the Safety Practices Warnings and Operation instructions contained in this manual Failure to follow these safety practices could result in death or serious injury DAILY 1 Clear all debris dirt snow etc from the path of the sensing roller 2 Check for worn torn or missing dock bumpers Replace if necessary 3 Check that all lights on the control panel and both outside lights and alarm are functioning WEEKLY 1 Remove all debris from the chock parking area and under the wheel restraint housing QUARTERLY 1 Check the level of fluid in the hydraulic reservoir Oil level shall be within 3 1 2 inches of the fill port with restraint in stored position 2 Lubricate the arm latch and arm release bearings and the mating faces of arm latch and arm release with light oil Ensure that they pivot freely See Fig 19 3 Inspect the mechanism for any signs of wear distortion or cracked welds 4 Check all decals and outside sign Replace as needed Fig 19 18 2013 4Front Engineered Solutions Inc 6001813Q Automatic Wheel Restraint ANNUALLY 1 Check for proper operation ofthe heat tape when installed yearly before the cold weather SLSC HYDRAULIC CYLINDER FILLING AND BLEEDING 1 Verify that the reserv
22. D outside display GREEN HEATER OPTIONAL 1 Onthe inside of the wall mount the thermostat housing on the chock side of the door opening and in close proximity to the outside alarm Protrude the bulb through the wall and under the outside alarm to protect the bulb from direct sunlight 2 Wire the heating element into the thermostat housing Power for the heating element is to be wired from the control panel to a circuit breaker and GFI protection in the power unit junction box then to the thermostat housing and then to the heating element as shown in the power unit junction box wiring diagrams on pages 37 38 3 Set the thermostat 10 F lower than the current outside temperature Test the heating element and chock for proper operation Reset the thermostat to 40 F or desired activation temperature Fig 10 Thermostat Pilot light housing Y Cover removed Il for clarity U U e od o Bulb Locate under outside alarm protected from direct Capillary tube sunlight December 2013 6001813Q Automatic Wheel Restraint 13 2013 4Front Engineered Solutions Inc OPERATING INSTRUCTIONS Use these instructions for normal operations Before operating the wheel restraint read and follow the Safety Practices Warnings and Operation instructions contained in this manual Use by untrained peo
23. FLA PANEL FLA TERMINAL BLOCK STRIP 208 14A FU209 1A 8 8A 9 3A AS BUILT LAYOUT PER PANEL 240 73a FUSOS 2A 8 04 BBA USE CLASS CC TIME DELAY FUSES JB1 L1 GND_LUG 2 2 12 18 CO Resse 7 FUSE E LEGEND RI PANEL WIRING F FIELD WIRING BY OTHERS R3 SEE PANEL SCHEMATIC PO BOARD EE FOR TAP DETAILS NOTE RC FU1002 SENE STANDARD TERMINALS WILL ACCEPT RG gt 12AWG STRANDED WIRE MAXIMUM OM 129 o 7 WIRE COLOR GAUGE NFPA 24 d 7 unless otherwise specified 8 208 600VAC 14 BLK 5 120VAC 16 RED FU1005 24VAC 16 RED BLK 13 NEUTRAL 16 WHT 14 o GROUND GRN SA NEU 24VDC 18 BLU 24V COM OVDC 18 BLU WHT 6B 12VAC VDC 18 VIO Svi GE 12V COM 18 VIO WHT N NOTE Power to control panel must be from fused disconnect supplied by others Max Type CC fuse size shown above 28 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc E LECTRICAL SCH EMATIC continued Fig 25 208 600V 3PH 50 60HZ CB FU TO BE SUPPLIED BY OTHERS RESTRAINT SUPPLY BCPD CB FU SEE TABLE Det PANEL FLA SEE TABLE SCCR 5KA u M1014 OL101 T CT Gen L2 1 t MOT702 bo Cray Gb RESTRAINT SL2 AT2 MOTOR L3 1 i agi X opz 7 FLA SEE TABLE 3450RPM SEE TABLE dji E L THREE PHASE PANEL REFERENCE VOLTAGE BCPD FUSE MOTOR FLA PANEL FLA 208 8A
24. FU409 1A 4 64 5 14 240 8A FU509 2A 4 24 5A 380 SA FU609 2A 2 3A 3A TERMINAL BLOCK STRIP 480 4A FU709 1A 2 14 2 5A 600 4A FU809 2A 1 7A 2 34 AS BUILT LAYOUT PER PANEL B1 L1 GND_LUG E 2 L3 12 18 19 21 22 R1 R2 R3 RC RC FU1002 XF SEE PANEL SCHEMATIC FOR TAP DETAILS OV 7 8 9 13 6A 6B sv1 24V NOTE Power to control panel must be from fused disconnect supplied by others Max Type CC fuse size shown above FU1005 14 o 120 0 24 NEU USE CLASS CC TIME DELAY FUSES LEGEND NFPA PANEL WIRING FIELD WIRING BY OTHERS PC BOARD TRACES NOTE STANDARD TERMINALS WILL ACCEPT 12AWG STRANDED WIRE MAXIMUM WIRE COLOR GAUGE NFPA unless otherwise specified 208 600VAC 14 BLK 120VAC 16 RED 24VAC 16 RED BLK NEUTRAL 16 WHT GROUND GRN 24VDC 18 BLU 24V COM OVDC 18 BLU WHT 12VAC VDC 18 VIO 12V COM 18 VIO WHT LEGEND 380V application PANEL WIRING FIELD WIRING BY OTHERS PC BOARD TRACES NOTE STANDARD TERMINALS WILL ACCEPT 12AWG STRANDED WIRE MAXIMUM WIRE COLOR GAUGE EU unless otherwise specified 208 600VAC 14 BRN BLK GRY 120VAC 16 BRN 24VAC 16 RED BLK NEUTRAL 16 LT BLU GROUND GRN YLW 24VDC 18 BLU 24V COM OVDC 18 BLU WHT 12V
25. For vehicle presence sensor installed termination see schematic included in panel a The sensor is a 4 wire device First terminate the positive lead brown wire to any C terminal on the input board b Terminate the negative lead blue wire to any OV terminal in the panel c Terminate the load lead black wire to the terminal specified in the job specific wiring schematic d Tape insulate the unused white wire Fig 9 Building wall N Top View cet 12 6001813Q Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc Note Rotate head 5 from center 3 4477 lt lt Conduit to control lt panel Center line of door opening Front View o Building wall TT 48 ref gt 315 370 7 1 2 rigid conduit with 15 bend 14 6 minimum above grade Side View gt December 2013 INSTALLATION INSTRUCTIONS continued OPERATIONS No Trailer Present e Inside lights display Solid RED outside display GREEN Trailer Arrives e Inside lights switch to Solid AMBER and RED outside lights continue to display GREEN Operator engages vehicle restraint e Inside lights switch to Solid GREEN outside lights switch to display RED Operator releases vehicle restraint Inside lights switch to Solid AMBER and RED outside lights continue to display GREEN Trailer Departs Inside lights display Solid RE
26. GE button The chock assembly will travel outward on the rail until the sensing roller contacts the rear of the test bar and the chock arm is fully extended The housing will then reverse c Have the assistant hold the test bar with the rear end against the dock wall so the chock will contact the front of the test bar When the chock contacts the end of the test bar the power unit will stop and the test bar will be locked against the wall d Press the RELEASE button The chock assembly will travel outward on the rail for several seconds and will then reverse The chock arm should retract The chock housing will continue to reverse until it stops against the dock wall If the chock arm does not retract block sensor arm rollers forward motion until carriage item 1 and lock item 2 separate 18 Refer to the operation and maintenance instructions If the wheel restraint does not operate properly refer to the troubleshooting guide on pages 19 21 TRAILER PRESENCE SENSOR OPTIONAL The trailer present sensor senses a vehicle at the dock and transmits a signal to the control panel This turns on the panel face AMBER light Mount the sensor See Fig 9 Ensure the sensor s logic switch is set to L O Light Operate The switch is located on the top of the sensor under a plastic cover Wire the switch Wire the sensor into the panel per the per the job specific schematic located in the panel Test for proper operation as per below 1
27. LK NEUTRAL 16 WHT GROUND GRN 24VDC 18 BLU 24V COM OVDC 18 BLU WHT 12VAC VDC 18 VIO 12V COM 18 VIO WHT NOTE Power to control panel must be from fused disconnect supplied by others Max Type CC fuse size shown above ADANGER Before doing any electrical work make certain the power is disconnected and properly tagged or locked off All electrical work must be done by a qualified technician and meet all applicable codes If it is necessary to make troubleshooting checks inside the control box with the power on USE EXTREME CAUTION Do not place your fingers or uninsulated tools inside the control box Touching wires or other parts inside the control box could result in electrical shock death or serious injury December 2013 6001813Q Automatic Wheel Restraint 27 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC continued Fig 24 208 240V 1PH 60HZ CB FU TO BE SUPPLIED BY OTHERS RESTRAINT SUPPLY BCPD CB FU SEE TABLE CONTER PANEL FLA SEE TABLE dora SCCR 5KA u M1014 OL101 1 RESTRAINT t TT deeg E HP MOTOR H ig j i FLA SEE TABLE 30 POL E 3450RPM Bg HO SEE CHART G THREE PHASE PANEL REFERENCE c VOLTAGE BCPD FUSE MOTOR
28. Note Motor rotation must be correct Refer to startup instructions on page 9 a Reverse motor rotation by reversing any 2 of the three 3 phase motor supply wires b Check for 120 VAC to solenoid valves c Fuse FU1011 faulty d Solenoid valve problem e Hydraulic pump problem f Manual release knob SV1 is open December 2013 c Check fuse FU1011 Replace if faulty d If voltage present check valves and solenoid coils e If input 3 does not go off check hydraulic pump f Push knob in and rotate clockwise See Fig 19 6001813Q Automatic Wheel Restraint 23 2013 4Front Engineered Solutions Inc TROUBLESHOOTING GUIDE continued Use the Troubleshooting Guide if ever the wheel restraint fails to perform properly Find the condition that most closely matches your situation and make the recommended adjustments Observe all safety warnings before attempting Before servicing the wheel restraint read and follow the Safety Practices on Page 3 and the Operation section in this manual any maintenance procedure PROBLEM 6 Chock housing moves but chock arm does not fully extend POSSIBLE CAUSE a Sensing roller problem b Pressure switch problem c Arm Latch and Release weldments not pivoting freely 7 Chock will not engage or disengage a Carriage guide rollers are incorrectly adjusted and not rolling smoothly 8 Motor runs and chock housing moves but chock ar
29. OLT PUR WHT 18GA December 2013 6001813Q Automatic Wheel Restraint 37 2013 4Front Engineered Solutions Inc POWER UNIT J BOX continued 120VAC WITH HEATER 6012019 Fig 120V 1PH 60HZ 35 INCOMING SERVICE TO BE TERMINATED AS SHOWN PANEL FLA 2 9AMPS SCCR SKA D_LUG 38 LEGEND FACTORY WIRING FIELD WIRING BY OTHERS WIRE COLOR GAUGE unless otherwise specified 208 600VOLT BLACK 14GA 120VAC RED 16GA 24VAC RED BLK 16GA 120 24VAC NEUTRAL WHT 16GA 24VDC BLUE 18GA 24VDC OVDC BLU WHT 18GA 12VOLT AC OR DC PURPLE 18GA 12VOLT PUR WHT 18GA FIRST COLUMN OF TERMINALS IS RESERVED FOR FIELD USE JUNCTION BOX TO CONTROL PANEL r LABEL USING PLOTTED PLASTIC TABS 6002307 REMOTE STOP PUSHBUTTON STATION LOCATED ON NOTE JUMPER WIRE TERMINALS 21 AND 22 IF REMOTE STOP PUSHBUTTON STATION IS NOT INSTALLED MAY ALSO BE TERMINATED OR JUMPERED IN MAIN CONTROL PANEL p TESTARORTS THIS LEAD NOT USED IN SINGLE PHASE APPLICATIONS LI ot MOTOR 4 O T2 O T3 O Ri gt PRSI CARRIAGE RETRACTED AND R2 gt prs HOOK RETRACTED SENSORS SWITCH O LOCATED ON RESTRAINT JUMPER TO BE O R3 oro PS1 PLACED IN LEFT HAND SE COLUMN AS SHOWN TT o ORE Q ee
30. Parea Tag Dee Do fenosso ruros ESAS WEEN KR BS CEE EE pos SEA PB912 2 2 2 2 2 2 632229 PB918 PO O IO O ss AO CIO ICO IC IA LES A ALLEL TE FU1018 A mas ronco 1 1 1 6002308 lili om CR rer Me ae IA DIO CIO IC ICI EEC IE D ICI IC IC E IS 48 60018130 Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc PARTS LIST EXTERIOR SIGN AND LIGHTS Fig 41 Outside Sign Standard 24V Compact Lights s A CAUTION MOVE ON GREEN 24 ONLY HO IVOM 13340 Y MO A 3 913 gt e 9 gt Item Quantity Part Description Part Number II Outside Sign 709832 2 1 24V Light Assembly Complete Compact Light LED 6007798 Lens Red LED Light Assy 6007800 Lens Green LED Light Assy 6007801 Included with item 2 December 2013 6001813Q Automatic Wheel Restraint 49 2013 4Front Engineered Solutions Inc NOTES 50 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc LIMITED WARRANTY THIS LIMITED WARRANTY IS 4FRONT S SOLE AND EXCLUSIVE WARRANTY WITH RESPECT TO THE WHEEL RESTRAINT AND IS IN LIEU OF ANY OTHER GUARANTEES OR WARRANTIES EXPRESS OR IMPLIED 4Front warrants that this WHEEL RESTRAINT will be free from flaws in material and workmanship under normal use for a period of one 1 year from the earlier of
31. SV1 svi SOLENOID ja SE O sv1 BB H o sv2 NEUTRAL O N OO cHock motion O 6A ALARM O 68 NC OPTIONAL REMOTE O 21 aT STOP 5122 OUTSIDE WALL LOAD GFI SWITCH O 23 LEV 8590 O 24 ENA MARKERS TO BE AN BR PLOTTED PLASTIC TABS SE HEATER ELEMENT 623 202 061 787 THERMOSTAT ASSEMBLY 38 02013 4Front Engineered Solutions Inc 6001813Q Automatic Wheel Restraint December 2013 208 600VAC WITH HEATER 6012069 Fig 36 208 600V 50 60HZ INCOMING SERVICE TO BE TERMINATED AT DISCONNECT POWER UNIT J BOX continued FIRST COLUMN OF TERMINALS IS RESERVED FOR FIELD USE JUNCTION BOX TO CONTROL PANEL r LABEL USING PLOTTED PLASTIC TABS PANEL FLA SEE FLA CHART fa WEST PORIs THIS LEAD NOT USED IN SCCR 5KA SINGLE PHASE APPLICATIONS II RSR es de 3 Olm BYPASS THIS FUSE SEGMENT ON MOTOR Ol 12 M SINGLE PHASE APPLICATIONS WITH ES I NEUTRAL ATTACH FIELD NEUTRAL DIRECTLY TO TERMINAL H2 O R1 CH gef ooo PRS1 CARRIAGE RETRACTED AND R As co lt gt PRS2 HOOK RETRACTED SENSORS Ales O 2 SI LOCATED ON RESTRAINT JUMPER TO BE O R3 oro PS1 PLACED IN LEFT HAND COLUMN AS SHOWN IT OTRC go Malsi ly 107 SOLENOID oil lo NEUTRAL O N O CHOCK MOTION O 6A O
32. T that is claimed to be deficient in material or workmanship shall be as set forth in this Limited Warranty This Limited Warranty will be null and void if the original purchaser does not notify 4Front s warranty department within ninety 90 days after the product deficiency is discovered THERE ARE NO WARRANTIES EXPRESS OR IMPLIED WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF INCLUDING BUT NOT LIMITED TO AWARRANTY OF MERCHANTABILITY OR OF FITNESS FORA PARTICULAR PURPOSE ALL OF WHICH 4Front HEREBY DISCLAIMS December 2013 6001813Q Automatic Wheel Restraint 51 2013 4Front Engineered Solutions Inc Please direct questions about your wheel restraint to your local distributor or to 4Front Engineered Solutions Inc Corporate Head Office Your local 4Front Engineered Solution Inc distributor is 1612 Hutton Dr Suite 140 Carrollton TX 75006 Tel 972 466 0707 Fax 972 323 2661 SAFETY LOC SAFETY CHOCK SURFACE CHOCK 4Front Engineered Solutions 2013 4Front Engineered Solutions Inc Part No 6001813Q
33. ambertens 4 Reciangle base rediens Fused disc terminal block 1 4 x1 1 4 6000518 6000522 823111 ES 823107 P 823107 EE 6000538 FU1002 O 6000549 End stop screwless 6mm 6000559 BP 8 Rectifier 25 Amp Twido PLC 14 DC 10out rly N 6000562 DV1029 6001056 PLC902 6006375 LT1006 6006376 LT1007 co Xfmr 240 480V to 120 24V 200VA NNN 6006815 XF311 NA 1 Xfmr 208 240 415V 120 24V 250VA E250TC XF611 Xfmr 208 240 480V 120 24V 100VA E RE EE A lee 6007396 XF211 XF411 Dre 500120124 350va YAA rm N ER E E Es 25 26 27 December 2013 6001813Q Automatic Wheel Restraint 47 2013 4Front Engineered Solutions Inc PARTS LIST CONTROL PANEL continued Serco Kelley Item Part Description Terminal 4 pole Block fuse 1 pole fingersafe Block fuse 2 pole fingersafe Suppressor Pushbutton mushroom NEMA 4 4x 1 Selector 2pos sprg rtn left NEMA 4 4x 13 Block contact N O Block contact N C Fuse Flasher 4 wire 10 30VAC VDC Fuse time delay Fuse time delay Fuse 1 Fuse Fuse Panel face label Serco Panel face label Kelley Green lens oval Amber lens rectangle Red lens rectangle Alarm TNF optional 6001710v1 6001710v2 6001710v3 6001710v4 6001710v5 6001710v6 6001710v7 6001710v8 6001801v1 6001801v2 6001801v3 6001801v4 6001801v5 6001801v6 6001801v7 6001801v8 neers nr sree
34. assembly as shown in Fig 21 4 Pull on the pry bar until the lock wedge moves past the end of the chock arm Fig 21 Roller arm pin When the lock wedge is clear of the chock the chock arm will start to retract The sensing roller will contact the back of the wheel and prevent the chock from fully retracting As the vehicle slowly moves forward the wheel will move away from the roller and the chock will fully retract If the wheel restraint cannot be restored to normal operation or cannot be moved to the stored position remove the roller arm pin and the sensing roller arm to prevent damage by the next vehicle Return the pressure relief valve to the closed position before operating pump Release plates 20 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc Use the Troubleshooting Guide if ever the wheel restraint fails to perform properly Find the condition that most closely matches your situation and make the recommended adjustments The functions of the wheel restraint are controlled by a Programmable Logic Controller PLC which has LED indicator lights to display errors and the state of input and output signals Fig 22 PLC TROUBLESHOOTING GUIDE A WARNING Do not service this product unless you have read and followed the Safety Practices Warnings and Operation instructions contained in this manual Failure to follow these safety practices could result in
35. ayout the installation position Refer to the wheel restraint installation drawings included in this publication for clarification of the following instructions See Fig 4 NOTE For units with remote roller guard refer to the formal approval drawing specific to the site a Mark the center line of the dock on the driveway This is point A b While facing the dock measure over 52 to the left of the center line and mark the driveway at the dock wall This is point B c Measure 146 out from the dock wall from point B and draw a line on the driveway parallel to the wall d Hold one end of the tape measure on the center line of the dock wall point A and measure out 155 to the 146 line Mark where the 155 distance crosses the 146 line This is point C e Mark aline from point B to point C and extend the line out 26 from the dock face This line will be square to the dock wall 6 6001813Q Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc Fig 4 concrete anchors 3 146 55 to bottom 7 edge of gt tube typ 27 7 Ret Point C Dock centerline 3 4 concrete anchors 2 3 4 concrete anchors 2 Le Door centerline to door centerline PLAN VIEW minimum 11 6 required December 2013 INSTALLATION INSTRUCTIONS continued 2 Position the wheel restra
36. cable codes If it is necessary to make troubleshooting checks inside the control box with the power on USE EXTREME CAUTION Do not place your fingers or uninsulated tools inside the control box Touching wires or other parts inside the control box could result in electrical shock death or serious injury WHEEL RESTRAINT STARTUP INSTRUCTIONS 1 Referto the manual for operation instructions and location of components in the control panel Remove the 3 8 NPT plug from the hydraulic reservoir and install the breather cap 2 Tum on the electrical power to the wheel restraint Open the control panel and locate the LED indicators for the Inputs and Outputs Input O should be on If not ensure the circuit breaker is on and check wiring to the pressure switch Pressure switch NC normally closed contacts are used 3 Because the proximity switch inputs 1 and 2 are not on the control will be in Jog Mode and the inside AMBER light will flash The operator will be able to manually control the motor using the ENGAGE and RELEASE buttons in Jog Mode See Jog Mode instructions on page 16 4 Press the ENGAGE button and hold it for no more than 10 seconds Input 3 LED should go off and the gauge should indicate pressure from the pump If there is no indication of pressure and the electrical power is three phase reverse the wires to terminals Tl and T2 Repeat step 4 5 Press the RELEASE button and hold it for at least 15 se
37. conds to run the pump and force the air out of the hoses Then turn off electrical power to the panel 6 Place a container under the hydraulic cylinder ports to catch any fluid which may leak from the hoses during step 7 Refer to the hydraulic installation drawing to identify the E and R ports of the cylinder 7 Disconnect the hoses from each other and attach the hoses to the hydraulic cylinder Try to minimize fluid loss and air entry while connecting the hoses 8 Check that the hydraulic fluid is showing on the breather dip stick in the reservoir Add fluid if required NOTE An assistant is required for the following operations Refer to the Test Drawing on page 11 for clarification of instructions Keep hands and feet away from the pinch points at the ends of the test bar when chock is moving Keep away from the path of the chock arm when using the test bar 9 Selecta piece oflumber stock or other suitable bar about 6 long This test bar will be used to simulate contact with a wheel during the startup procedure Place one end of the test bar against the back of the front mounting post of the guide rail and the other end in the path of the washer on the sensing roller Refer to Fig 8 10 Ensure driveway is clear before operating the wheel restraint Then turn on the electrical power to the wheel restraint 10 6001813Q Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc D
38. death or serious injury ADANGER Before doing any electrical work make certain the power is disconnected and properly tagged or locked off All electrical work must be done by a qualified technician and meet all applicable codes If it is necessary to make troubleshooting checks inside the control box with the power on USE EXTREME CAUTION Do not place your fingers or uninsulated tools inside the control box Touching wires or other parts inside the control box could result in electrical shock death or serious injury Input connections DOD 6 6 6 6 6 6 6 6 6 6 6 6 6 O 24V OV DC IN DC out com 0 12 3 4 5 6 7 8 9 10 1112 13 E o ES 100V 240VAC Un O Input output display Ry OUT OUT OUT OUT Moun 1 2 3 m4 5 6 TUM 8 Wows 9 DOQO DOOOOOOWDHOOOO Memory cartridge port PROBLEM A Motor does not run 1 No lights on control panel No PLC LED indicator lights b Blown fuse s c Blown transformer primary fuse s December 2013 Output connections POSSIBLE CAUSE a No power to control panel 24 VDC INPUT SOLUTION a Check for primary power at terminals L1 L2 and L3 L and N on single phase units b Check fuse FU1002 Replace if faulty c Check transformer primary fuses replace if necessary 6001813Q Automatic Wheel Restraint 21 2013 4Front Engineered Solutions Inc TROUBLESHOOTING GUIDE continued Use the Troubleshooting Guide if ever the wheel restra
39. e motor and to the warning lights Input Signals 0 Restraint Override Lights Only not selected 1 PRS1 Carriage Retracted proximity sensor ON 2 PRS2 Chock Arm Retracted proximity sensor ON 3 PS1 N C Pressure switch OFF 4 Reserved 5 Reserved 6 ENGAGE button depressed 7 RELEASE button depressed 8 Door opened N A for standard panel applications 9 Door closed 10 Leveler stored proximity sensor ON 11 Reserved 12 Snugging enabled 13 STOP button pulled out DIAGNOSTICS MODE PLC LED DISPLAY The PLC continuously monitors system operation and will indicate when it is malfunctioning If an error occurs that could be potentially dangerous the restraint will halt operation and the inside panel lamps will display an indication of the error If a restraint fault has occurred e Inside RED lamp is on e Inside AMBER lamp is flashing a trouble code Jog mode is automatically activated To identify the specific problem count the flashes of the AMBER lamp and compare the number to the table below The count sequence will be repeated until the cause of the restraint fault is corrected and the RELEASE push button is pressed A two second pause between flash sequences is employed Trouble Code Definitions PLC DIAGNOSTICS Output Signals O Inside RED lamp ON 1 Inside AMBER lamp ON 2 Inside GREEN lamp ON 3 Outside GREEN lamp relay ON 4 Solenoid valves ON carriage moving forward
40. ecember 2013 INSTALLATION INSTRUCTIONS continued Chock arm will swing out of housing when test bar contacts roller arm Keep clear 11 12 13 14 15 16 Turn and hold the selector switch on the control panel to the RESTRAINT OVERRIDE LIGHTS ONLY position Press and hold the ENGAGE button to extend the chock housing away from the dock The inside RED light should be flashing to indicate Jog Mode Continue holding the button until the sensing roller contacts the rear end of the test bar and the chock arm extends fully Then press the RELEASE button to retract the chock housing and release the test bar Referring to page 31 adjust the bolts for the sensor roller arm until the front of the roller is 32 from the surface of the chock as shown Tighten the adjustment bolts gently only enough to hold the pin in place and then tighten the jam nuts securely DO NOT overtighten the adjustment bolts Turn the selector switch clockwise and hold it in the RESTRAINT OVERRIDE LIGHTS ONLY position Press and hold the RELEASE button to bring chock assembly toward the wall Have the assistant hold the test bar with the rear end against the dock wall so the chock will contact the front of the test bar and the chock will be locked in position See Fig 8 While holding the selector switch in the RESTRAINT OVERRIDE LIGHTS ONLY position press and hold the ENGAGE button to free the test bar Then press and hold the RELEASE b
41. ic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc OPERATING INSTRUCTIONS continued MANUAL OPERATION USING JOG MODE This feature will allow the wheel restraint to be operated manually using the ENGAGE and RELEASE push buttons to accommodate the return of the wheel restraint to its home position in the event of a wheel restraint failure This mode will be entered automatically when the wheel restraint fault has occurred and will exit when all faults have been cleared the wheel restraint has been returned to its home position and the RELEASE push button has been pressed To aid in troubleshooting efforts the wheel restraint may be intentionally put into Jog Mode To manually initiate the Jog Mode turn and hold the Restraint Override Lights Only switch and press either the Engage or Release push buttons to extend or retract the carriage respectively See the control specification for details regarding panel lamp status Fig 17 Fig 18 Extend December 2013 Retract ED SA E Le a Z Keep hands and feet away from the wheel restraint when in Jog Mode Disconnect power to the control panel or turn the circuit breaker to OFF before attempting to remove an obstruction or to make adjustments Failure to obey this warning may result in death or serious injury 6001813Q Automatic Wheel Restraint 17 2013 4Front Engineered Solutions Inc PLANNED MAINTENAN
42. in minor or moderate injury NOTICE Notice is used to address practices not related to personal injury December 2013 Read these safety practices before installing operating or servicing the wheel restraint Failure to follow these safety practices could result in death or serious injury READ AND FOLLOW THE OPERATING INSTRUCTIONS IN THIS MANUAL BEFORE OPERATING THE WHEEL RESTRAINT If you do not understand the instructions ask your supervisor to teach you how to use the wheel restraint Improper installation of wheel restraint could result in death or serious injury to dock workers or other users of the wheel restraint Vehicles leaving or moving when loading and unloading are in process could result in death or serious injury Be certain bystanders in the driveway stand clear when the wheel restraint is operating Be certain to follow the installation instructions in this manual OPERATION Use by untrained people can cause property damage bodily injury and or death Your supervisor should teach you the safe and proper way to use the wheel restraint Read and follow the complete OPERATING INSTRUCTIONS on page 14 before use Do not use the wheel restraint if it is not working right Tell your supervisor it needs repair Do not operate the wheel restraint with equipment material or people directly in front of the restraint Do not use the wheel restraint if it looks broken or does not seem to work right Tell
43. inside lights will change to solid AMBER and solid GREEN 3 Press the ENGAGE button to move the lock assembly forward If the motor will not run or the lock assembly will not move go to Method B 4 After the chock has stopped moving forward press the RELEASE button to retract the lock assembly and the chock arm should also retract 5 If the chock still does not retract go to Method B 6 Hold the RELEASE button until the chock returns to the stored position 7 Press the RELEASE button once to return to normal mode with a constant RED light NOTE To manually release the restraint push button in twist counterclockwise and release In this position the valve will remain open To return to normal operation push button in twist clockwise and release see diagram December 2013 Fig 20 Pump and motor assembly used on Method B 60018130 Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc 19 EMERGENCY RELEASE PROCEDURE continue METHOD B MANUALLY RELEASE THE HYDRAULIC PRESSURE no electric power at dock 1 Turn circuit breaker OFF inside control panel 2 Open the MANUAL RELEASE knob on the hydraulic solenoid valve SV1 This will open the valve release pressure and allow fluid to escape from the hydraulic cylinder See Fig 20 3 Raise the cover of the wheel restraint Place a pry bar between the release plates on the chock arm and lock
44. int fails to perform properly Find the condition that most closely matches your situation and make the recommended adjustments Observe all safety warnings before attempting Before servicing the wheel restraint read and follow the Safety Practices on Page 3 and the Operation section in this manual any maintenance procedure PROBLEM POSSIBLE CAUSE 2 Some lights on control panel face a Program faulty No PLC LED output lights on 3 Motor starter does not engage a Incorrect wiring b Hoses Reversed c Fuse FU1011 faulty d Pressure relief valve open e Solenoid valve problem f Hydraulic pump problem 4 Motor starter engages but a Missing power phase 3 phase motor does not run or runs motor poorly Highlyrecommenddisconnecting Damaged contactor the motor leads in the control panel prior to performing tests in this section Contactor and overload relays will be damaged if connected to a short circuit c Damaged overload relay 22 6001813Q Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc SOLUTION a Reload program Consult factory a Check for 120 VAC to solenoid valves b Check for proper routing of hoses to pump ports c Check FU1011 Replace if faulty d Check the manual release on solenoid valve 2 SV2 Make sure manual valve is closed See Fig 20 e If voltage is present check valves and solenoid coils f If input 3 does not go
45. intassembly againstthe walland Fig 5 on the left side of the driveway with the inside edge of the guide rail tube directly above the line B C Secure the rail assembly to the driveway with five anchor bolts 3 4 A SEN 4 diameter by 5 1 2 long Furnished by 4Front Engineered IN gt N Solutions Inc Do not anchor bolt to the building wall 8 1 2 Min Torque to 110 ft Ibs 12 3 8 M Remote roller guard 14 5 8 3 Mountthe optional remote roller guard and spacer Secure the remote roller guard and spacer with 3 4 x 5 1 2 long anchor bolts See Fig 5 4 Using the carriage bolts supplied attach the rail extension to the front of the rail and to the nose cone Do not tighten the bolts Line up the rail extension with the line B C 5 Remove the covers from the nose cone and mark the location of the two mounting holes on the pavement Remove the nose cone and drill the holes for the anchor bolts 6 Secure the nose cone to the driveway with two anchor bolts 3 4 diameter by 5 1 2 long Tighten the rail extension bolts and replace the covers on the nose cone 7 Mountthe hydraulic power unit inside the building near the end of the rail assembly Install a 2 1 2 diameter duct for hydraulic hoses from the power unit to the whee
46. l restraint Install conduits for electric wires if required by local codes The wires are for the 24 VDC proximity switches and for the optional 120 VAC heater 8 Mount the control panel on drivers side of the dock so that the communication lights are visible to the fork truck driver Mount the outside communication lights and sign so that they are visible to the vehicle driver Mount the motion alarm on the same side as the restraint using the provided mounting bracket Refer to the installation drawing for recommended dimensions Make sure the RED light is on top and the GREEN light on the bottom when the light assembly is mounted See Fig 6 December 2013 6001813Q Automatic Wheel Restraint 7 2013 4Front Engineered Solutions Inc INSTALLATION INSTRUCTIONS continued The chock motion alarm assembly must be located in the area of the chock on the outside wall A bracket is provided for outside wall mounting Failure to mount the alarm outside in close proximity with the chock may reduce its effectiveness which could result in death or serious injury The motion alarm assembly is designed and controlled to sound whenever the chock is in motion All wiring must be done by a qualified technician and must meet all applicable codes 10 Make all connections as shown on electrical installation drawings see pages 27 30 and 36 38 This includes power into the control panel from a fused disconnect wiring from panel to mot
47. m assembly will not release wheel a Chock wedging on front of wheel b Extend Latch did not release 9 No outside lights on a Fuse FU1005 faulty b LED s burnt out 10 Restraint operates properly Some PLC LED indicator lights on No lights on control panel face a LED s burnt out 24 2013 4Front Engineered Solutions Inc 6001813Q Automatic Wheel Restraint SOLUTION a Check that the chock does not strike the side of the wheel as it extends Adjust roller arm if necessary b Adjust pressure switch setting to 450 PSI Replace if faulty c Lubricate weldment pivots and the edges where these two parts make contact See page 18 Quarterly Maintenance a Adjust all cam rollers so that the carriages slide smoothly on the rail Clean lubricate and adjust cam rollers a Check that the sensing roller is not too close to the back of the wheel Adjust roller arm if necessary b Re engage the wheel using Jog Mode if required Disconnect electrical power and inspect latch a Check fuse FU1005 Replace if faulty b Check LED s in outside lights Replace if faulty a Check LED s in panel face lights Replace if faulty December 2013 CONTROL PANEL LED DISPLAY The wheel restraint is controlled by a_ solid state programmable logic controller PLC which reads input signals from the push buttons and proximity sensors and closes the appropriate output relays to th
48. ne ES Y OUTSIDE VIEW Hydraulic power unit for wheel restraint IEA 3 4 ID conduit power e rast ior wheel restraint by others ee A E qdo alia es SIDE VIEW Typical control installation 1 ID conduit for safety chock 24VDC control voltage and 120VAC panel supply voltage by others Hydraulic power unit assembly dd y 4Front Wheel restraint control panel installed by others supplied by 4Front ge by GER 1 48 All conduit and al electrical interconnection 60 by others Y T T INSIDE WALL VIEW December 2013 6001813Q Automatic Wheel Restraint 9 2013 4Front Engineered Solutions Inc INSTALLATION INSTRUCTIONS continued 12 Obtain the adjustment bolts from the shipping tube for the sensor roller arm and install the roller arm on the pivot pin See Fig 7 Adjust the sensor arm to 32 See page 31 When adjustment is complete secure the position of the adjusting bolts with jam nuts Do not overtighten the adjusting bolts Before installation read and follow the Safety Practices on page 3 Failure to follow these safety practices could result in death or serious injury ADANGER Before doing any electrical work make certain the power is disconnected and properly tagged or locked off All electrical work must be done by a qualified technician and meet all appli
49. off check hydraulic pump a Check for voltage across L1 L2 L1 L3 L2 L3 All 3 measured voltages should be nominally equal If not check power source b With contactor energized check for voltage across contactor terminals T1 T2 T1 T3 T2 T3 All 3 measured voltages should be nominally equal If not replace contactor c Repeat as above but measure voltages across overload terminals T1 T2 T1 T3 T2 T3 If voltage is okay at contactor overload interface but not at overload terminals T1 T2 T3 replace overload relay December 2013 TROUBLESHOOTING GUIDE continued Use the Troubleshooting Guide if ever the wheel restraint A WARNING fails to perform properly Find the condition that most closely matches your situation and make the recommended adjustments Observe all safety warnings before attempting any maintenance procedure PROBLEM d Wiring faulty e Motor faulty 5 Motor runs but chock housing does not extend b Incorrect wiring POSSIBLE CAUSE a Motor rotation incorrect Before servicing the wheel restraint read and follow the Safety Practices on Page 3 and the Operation section in this manual SOLUTION d Disconnect motor wires at motor With motor wires connected in control panel check for voltage across T1 T2 T1 T3 T2 T3 If voltage is not okay but voltage is okay in control panel replace wiring e If all previous tests are okay and motor does not run replace motor
50. oir fluid level is within 3 1 2 inches of the fill port with the restraint in the STORED position against the wall 2 Forall ofthe operations described below run the pump in Jog Mode Turn the RESTRAINT OVERRIDE selector switch clockwise and hold it Then press the ENGAGE button to extend the cylinder or press the RELEASE button to retract the cylinder 3 Extend the cylinder 4 to 6 Rotate the cylinder to place the bleed screw facing up in an accessible position It may be necessary to loosen the cylinder support see items 29 and 43 on page 40 4 Using a 5 32 hex key loosen the bleed screw two full turns 5 Withadrip pan under the bleed screw retract the cylinder until clear fluid starts to flow from the bleed screw 6 Refill the reservoir with fluid see quarterly step 1 7 Fully extend the cylinder while holding the drip pan under the bleed screw 8 Tighten the bleed screw then wipe fluid from all surfaces 9 Retract the cylinder and watch for any fluid leaking from the bleed screw December 2013 EMERGENCY RELEASE PROCEDURE If the wheel restraint does not automatically release the vehicle wheel the chock can be retracted manually by moving the lock assembly away from the carriage assembly Depending on the cause of the problem use one of the following methods METHOD A OPERATE WHEEL RESTRAINT IN JOG MODE 1 Rotate and hold the RESTRAINT OVERRIDE LIGHTS ONLY switch 2 The
51. or hydraulic power unit outside lights outside motion alarm solenoid valve pressure and proximity switches and options such as trailer presence indicator and heat tape This would also include any interlocking between components such as to a vertically storing dock leveler 11 Attach the ends of the two supplied hydraulic hoses to the power unit fittings as shown on page 44 of this manual Seal the unattached ends with tape so dirt and foreign material cannot enter the hoses Route the hoses through the 2 1 2 duct to the outside and connect the free ends of the hoses together Do not connect the hoses to the hydraulic cylinder at this time NOTE Do not connect the hoses to the hydraulic cylinder until all air has been bled Air in the hydraulic system will cause jerky operation requiring the system to be bled Use bleed procedure shown on page 18 8 6001813Q Automatic Wheel Restraint 2013 4Front Engineered Solutions Inc December 2013 INSTALLATION INSTRUCTIONS continued Fig 6 Motion alarm mounted under wall bracket to outside wall above chock assembly Lights and sign supplied by 4Front Ba installed by others 3 4 ID conduit for control wirin by others 2 1 2 ID duct for hydraulics and heater cable by others Grade li
52. ple could result in death or serious injury Do not use the wheel restraint if it looks broken or does not seem to work right Tell your supervisor at once Keep hands and feet clear at all times Stay clear of the wheel restraint when it is moving Do not load or unload any vehicle unless you make certain the wheel restraint has securely engaged the tire and set the brakes If the wheel restraint does not chock the vehicle s tire for any reason BE CERTAIN TO MANUALLY CHOCK THE VEHICLE WHEELS BEFORE LOADING OR UNLOADING Enter the vehicle only when the GREEN signal light on the control panel is on You must check the GREEN signal light each time that the vehicle is entered If the GREEN light goes off at any time during loading operations immediately cease loading operations and check the wheel restraint to ensure that it is securely hitched If the power to the wheel restraint is interrupted immediately cease operations and check the unit Consult the troubleshooting instructions to reset the lights when power resumes Vehicles leaving or moving when loading and unloading are in process could result in death or serious injury Failure to follow these safety practices may result in death or serious injury Pressing the STOP button at any time will stop movement of the chock 14 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc OPERATING INSTRUCTIONS continued
53. product must be used Incorporation of replacement parts or modifications that weaken the structural integrity of the product or in any way alter the product from its normal working condition at the time of purchase from 4Front Engineered Solutions Inc may result in product malfunction breakdown premature wear death or serious injury 40 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc PARTS LIST WHEEL RESTRAINT continued Fig 38 December 2013 6001813Q Automatic Wheel Restraint 41 20 13 4Front Engineered Solutions Inc PARTS LIST WHEEL RESTRAINT continued 30701 6005615 30703 30705 30706 30708 6005621 30710 30715 031120 031447 213140 153108 153110 153111 153112 6004764 212104 212203 212207 212230 213019 214242 214351 214502 214538 214552 214 505 216257 6005709 6008645 231503 231505 234121 236106 236110 313584 6005625 328604 333045 333048 341001 341028 341029 Included with item 81 Included with item 82 tIncluded with item 80 fIncluded with item 62 Included with item 30 Included with item 63 A N 1 Co co S N E mes 42 60018130 Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc PARTS LIST WHEEL RESTRAINT continued GREASE FITTING DRIVE FIT LS1 LS2 PROXIMITY SWITCH C W HARDWARE EM BUSHING DU 1 1 4X1 20DU16 USHING NYLINER
54. ssure by pressing in and turning the manual relief knob CCW on SV2 See Fig 20 5 Let go of the RELEASE push button stopping the motor The gage should read 450 PSI with the motor stopped 475 PSI with motor running will drop to approx 450 PSI when the motor stops If the gage does not read 450 PSI repeat step 3 Fig 28 Pressure gauge NOTE After installation pierce the hydraulic gauge vent hole Retract port l Ko UD se END ge sf TO ST po port RV1 RV2 Turn counter clockwise Turn clockwise to decrease pressure to increase pressure S SON 32 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc ADJ USTM E NTS continued 6 If you pre set the pressure switch to 550 PSI as per Fig 29 step 3 the pressure switch input on the PLC should be ON With the gage holding at 450 PSI turn the pressure switch adjusting screw CCW while your helper watches the pressure switch PLC input light STOP when the PLC input light goes OFF The pressure switch is now set 7 Turn and hold the LIGHTS ONLY selector switch CW and press RELEASE While the motor is running turn the Relief Valve adjusting screw CW until the gage indicates 800 PSI Stop the motor and replace the sealing cap on the Relief
55. t 43 2013 4Front Engineered Solutions Inc PARTS LIST HYDRAULIC AND ELECTRICAL Thermostat housing nal Pilot light Cover removed for clarity Bulb Locate under outside alarm protected from direct sunlight Capillary tube 44 6001813Q Automatic Wheel Restraint December 2013 2013 4Front Engineered Solutions Inc PARTS LIST HYDRAULIC AND ELECTRICAL continued Quantity Part Description Part Number MOTOR MOUNT ASSEMBLY 6011998 POWER UNIT 120 1 50 60 6011930 POWER UNIT 208 3 50 6011933 POWER UNIT 240 1 50 60 6011954 POWER UNIT 240 3 50 60 6011955 POWER UNIT 480 3 50 60 6011931 POWER UNIT 575 3 50 60 6011932 1 JUNCTION BOX WITHOUT HEATER 6012068 JUNCTION BOX WITH HEATER 120V 6012019 JUNCTION BOX WITH HEATER 208 600V 6012069 HOSE AND FITTING ASSEMBLY 6013839 1 2 3 4 5 7 O 1 al 2 KELLEY LABEL 921186 2 o 2 3 1 ALARM CHOCK MOTION Part of item 13 j box with heater 1 1 1 ala CoO 4 2 2 22 2 24 2 27 2 2 2 6 7 0 1 3 25 6 8 9 0 1 December 2013 60018130 Automatic Wheel Restraint 45 2013 4Front Engineered Solutions Inc PARTS LIST CONTROL PANEL
56. utton The chock arm should retract into the housing If it does not then place the test bar against the back of the mounting post of the guided rail as described on step 9 so it will be in the path of the sensing roller Then extend the chock assembly until itis stopped by the sensing roller against the end of the test bar See Fig 8 While holding the selector switch in the RESTRAINT OVERRIDE LIGHTS ONLY position press and hold the RELEASE button and the chock arm will retract into the housing Continue holding the RELEASE button until the chock assembly is in the stored position against the wall When the wheel restraint is in the stored position against the dock wall the AMBER lamp will continue to flash if an error code has been set automatic jog mode Press the RELEASE push button to clear this condition and return to normal operation Fig 8 a bar D ee bar a Chock arm will swing out of housing when test bar contacts roller arm Keep clear December 2013 6001813Q Automatic Wheel Restraint 11 2013 4Front Engineered Solutions Inc INSTALLATION INSTRUCTIONS continued 17 To verify automatic operation of the wheel restraint a Place the test bar against the back of the front mounting post of the guided rail so it will be in the path of the sensing roller b Press the ENGA
57. your supervisor at once Keep hands and feet clear of the restraint mechanisms at all times Stay clear of the wheel restraint when it is moving Before chocking vehicle wheel or engaging the wheel restraint dump air from air ride suspensions and set parking brake Prior to using the wheel restraint Ensure the path of the sensing roller is free and clear of all debris ice and snow Ensure the freight carrier is parked firmly against the dock bumpers SAFETY PRACTICES OPERATION continued After engaging the wheel restraint Load or unload the transport vehicle only when the inside GREEN light is displayed e Ifthe wheel restraint cannot make engagement use wheel chocks to secure the transport vehicle then turn selector switch to RESTRAINT OVERRIDE LIGHTS ONLY Pressing the STOP button at any time will stop movement of the chock INSTALLATION MAINTENANCE AND SERVICE Before doing maintenance or service be certain that the power is disconnected and properly tagged or locked out Failure to follow these safety practices may result in death or serious injury If the wheel restraint does not operate properly using the procedures in this manual BE CERTAIN TO MANUALLY CHOCK THE VEHICLE WHEELS BEFORE LOADING OR UNLOADING Call your local distributor for service Place barricades around pit on dock floor and drive while installing maintaining or repairing the wheel restraint Do not stand in the driveway between

User`s Manual - Curlin, Inc.

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