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User`s Manual - Curlin, Inc.

1. oe O CN 3 L CYLINDER Cag MAIN CYLINDER O LIP CYLINDER Li E 46 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc PARTS LIST HYDRAULIC CYLINDERS AND HOSES continued HOSE ASSY 10081 3 8 ID x 17 6 JIC F SWVL 1 17 6003083 13 HOSE ASSY 100811 3 8 ID x 20 8 JIC F SWVL MAIN CYL 20 313545 4 1 HOSE ASSY 10081 3 8 ID 6 JIC F SWVL RETN 23 6003081 6003081 6003081 15 2 HOSE ASSY 101 28 ID 6 JIC F SWVL BUMP RETIEXT 2427 2 6014181 6003086 6003079 18 HOSE ASSY 100R1 3 8 ID 6 JIC F SWVL LIP RET 43 43 66 6014185 19 HOSE ASSY 10081 3 8 ID 6 JIC F SWVL BUMP EXT 51 75 99 6003087 HOSE ASSY 100R1 3 8 ID 6 JIC F SWVL BUMP RET 8880408 6014184 601422 6004725 21 HOSE ASSY 100 1 3 8 ID 6 JIC F SWVL MAIN 66 93 95 6004728 22 HOSE ASSY 10081 3 8 ID 6 JIC F SWVL LIP EXT 73 99 103 6014188 23 HOSE ASSY 400R4 3 8 ID 6 JIC F SWVL LIP RET 80 105 107 6004724 24 2 HOSE ASSY 100R1 3 8 ID 6 JIC F SWVL MAIN 40 35 35 6004729 April 2013 6003935D 60 80K Hydraulic Dock Leveler 47 2013 4Front Engineered Solu
2. Fig 35 PRIMARY FUSING AND DISCONNECT BY OTHERS LEVELER MOTOR PANEL FLA 3 ONTACTOR SCCR 5KA 7011 M1034 21 p 1 ToT VI EAS L2 7021 MOT702 ei ceo stehe ay e eee E cs tat 2 IET xen 44 MOTOR dE 7031 5 ELS 1 6A0460V 60HZ ze sra Fe Xe grs M le MOTOR DETAIL 380 480V THREE PHASE 50 60HZ NOTE Power to control box must be from fused disconnect supplied by others Fuse l l size can be no greater ___ NOTE VISUALLY CONFIRM MOTOR TAG thatthe CB FU size shown 9009 above for dual element time delay fuses DETD H3 7102 All electrical work must ane M72 oH4dH5 TERMINAL BLOCK STRIP meet all applicable codes _600 460 240 708 m rn ML All devices shown in de Tet energized state 10251 10271 1 2 15 CG o 2 3 17 18 20 21 ov 24VAC A an from 1027 51 10271 Pu 52 120VAC NEUTRAL il Lfrom 1024 from 1025 6 2 10241 10251 N N 9 i WIRE LEGEND N PANEL WIRING FIELD WIRING BY OTHERS PC BOARD TRACES NOTE TERMINALS WILL ACCEPT STRANDED WIRE ONLY WIRE COLOR GAUGE NFPA unless otherwise specified 208 600VAC 14 BLK
3. U 52 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc PARTS LIST CONTROL PANEL continued SINGLE PHASE UNITS 1PH 1PH 1PH Number 1 1 6000559 6000518 6000522 BLOCK FUSE 2 POLE FINGERSAFE FNQ R 2 FNQ R 1 6000538 GC 1 4 MDA 1 MDA 6 MDA 2 6006850 FUSE TIME DELAY 1A Kr xu 633 002 1 1 F i IEC CONTACTOR NR 0 5 7 5HP 9A OVERLOAD RELAY 12 18 AMP OVERLOAD RELAY 9 13 AMP OVERLOAD RELAY 5 5 8 AMP 17 PB MOM NEMA 4 4X 13 18 BLOCK CONTACT N O 19 PANEL DECAL SERCO PANEL DECAL KELLEY PB MUSHROOM NEMA 4 4X 13 1 BLOCK 2 2 632 229 22 TWIDOPLC t00 240v 1 1 6001056 23 TERMNAL2POLE 1293 2 2 600888 24 TERMINAL 4POLE 18 18 6006846 25 XFMR 120 240V TO 24V 350VA 1 6006811 XFMR 208 600V TO 120 24V 200VA 1 1 6012568 6006842 6000515 6000467 6000457 6000478 6000477 6000476 6000506 632 228 6000534 6007884 632 215 Broec prs 10 1249 27 ia 5 7 10 11 12 13 14 15 1 z gt w 1 2 2 1 1 20 21 April 2013 6003935D 60 80K Hydraulic Dock Leveler 53 2013 4Front Engineered Solutions Inc PARTS LIST
4. IB1 L1 L2 C C C C 2 3 17 18 20 21 ov uo 1 Qo sr o se 5 N N N April 2013 6003935D 60 80K Hydraulic Dock Leveler 31 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC 220 240V 1PH 60HZ Fig 32 PRIMARY FUSING AND DISCONNECT BY OTHERS EVELER MOTOR PANEL FLA 8 CONTACTOR SCCR 5KA MOT301 L1 3011 M1034 3012 LEVELER BE Cre FES UNE M TET 211 EXEC 773 MOTOR L2 3021 1 64N0230 60HZ See nS aoe ee S450RPM Il t 5L3 X 79er MOTOR DETAIL 208 230V SINGLE PHASE 50 60HZ NOTE Power to control box must be from fused disconnect supplied by others Fuse size can be no greater that the CB FU size shown above for dual element time delay fuses DETD All electrical work must meet all applicable codes All devices shown in de energized state 600 480 240 08 PR GA SEC 3101 H3 3102 H1oH2o oH4 E X3 X1 2 10241 10251 10271 419 XF311 200VA 24VAC from 1027 10271 120 from 1024 10241 WIRE LEGEND PANEL WIRING OTs ee FIELD WIRING BY OTHERS PC BOARD TRACES NOTE TERMINALS WILL ACCEPT STRANDED WIRE ONLY WIRE COLOR GAUGE NFPA unless otherwise specifi
5. NOTE Power to control box must be from fused disconnect supplied by others Fuse size can be no greater that the CB FU size shown above for dual element time delay fuses DETD All electrical work must meet all applicable codes All devices shown in de energized state LEVELER MOTOR CONTACTOR 9A MOT201 2011 1054 2012 LEVELER a roo yey 771 MOTOR L2 2021 amp 9N0208V 60HZ 1 312 Nea sp l 3 PM i 7 5L3 re X rers USD sacar m 6 BP H19H2 H5 CROUP 600 4807240 08V PRI XF211 120 24V SEC a 200VA 10241 10251 10271 24VAC from 1027 10271 120 from 1024 10241 WIRE LEGEND PANEL WIRING FIELD WIRING BY OTHERS PC BOARD TRACES NOTE TERMINALS WILL ACCEPT STRANDED WIRE ONLY WIRE COLOR GAUGE NFPA unless otherwise specified 208 600 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 DRY UNPOWERED 18 YLW NEUTRAL from 1025 10251 MOTOR DETAIL 208 230 SINGLE PHASE 50 60HZ w y Li 2 5 12 8 ij o GN NOTE VISUALLY CONFIRM MOTOR TAG ERMINAL BLOCK SIRIP AS BUILT LAYOUT PER PANEL
6. oc Ic 6003935D 60 80K Hydraulic Dock Leveler 11 2013 4Front Engineered Solutions Inc IN STALLATION continued Keep away from the dock leveler lip and bumpers when the raise button is pressed or released The lip and dock leveler are free to move and the bumpers move automatically when pressure is applied and or released 12 13 14 15 16 17 18 Read Safety Practices on page 3 and Operating Instructions on pages 16 17 With electrical power available use the controls to operate the dock leveler through the complete cycle to check operation Ensure the leveler operates properly Using the electrical power use the procedure shown on page 13 to place the leveler securely on both maintenance struts Check shims under ramp cylinder mounting pads Weld shims together and to subframe using 1 welds Remove shipping cotter pins from telescopic toe guards if equipped See Fig 11 Permanently mount the laminated dock leveler safety and operating instructions placard on the wall near the dock leveler controls See Fig 12 Make sure the c
7. IN 012345 111213 E lt 01 789 aes OUT 012345 go IN 012345678 910111213 3 5 0123456789 01234567 SNS PWRSS RUNES ERR STAT o 012345678 E aa lt 01254 aes IN 0123456789 10111213 0123456789 OUT PLC DIAGNOSTICS Press Bumpers retracting Press RAIS RAIS Bumpers fully retracted LIP Press EX Bumpers retracting LIP Press EXI Floating Bumpers fully retracted Bumpers fully retracted Floating Bumpers extending Floating Bumpers fully extended All outputs off Press SIOP April 2013 6003935D 60 80K Hydraulic Dock Leveler 2013 4Front Engineered Solutions Inc 39 AUTO RETURN TO DOCK A R T D OPERATIONS 1 When the lip 1 is extended the target bracket 2 rotates Fig 39 to the position shown 2 When the leveler floats down to the frame the lip will fall and cause the target bracket 2 on the lip arm to activate the proximity switch 3 on the deck The motor will start and the leveler will raise 3 When raised above the lip keepers 4 the
8. Curb Angle Lengths 4 x 4 x 1 4 Angle Quantity Pit Length A 4 Pit Length A 4 Pit Length A 4 Front Curb Angle Assy Angle length B 8 see pit layout for concrete anchor spacing Angle length C 4 see pit layout for concrete anchor spacing Face Curb Angle Assy Rear Curb Angle Assy Angle length 8 see pit layout for concrete anchor spacing April 2013 6003935D 60 80K Hydraulic Dock Leveler 7 2013 4Front Engineered Solutions Inc IN STALLATION continued HYDRAULIC DOCK LEVELER INSTALLATION INSTRUCTIONS Before installing the dock leveler read and follow the Safety Practices on page 3 and the Operating Instructions on pages 17 18 Failure to follow the safety practices and instructions could result in death or serious injury PIT CHECK 1 Check entire dock leveler pit for proper construction according to certified pit drawings Check to be sure that the pit walls are square and plumb Check electrical service running to the control panel to assure it agrees with the phase and voltage of the pump motor and control panel supplied with the dock leveler See tag attached to hydraulic power unit and wiring diagram located inside the control panel INSTALLATION OF DOCK LEVELER Place barricades on the dock floor around the dock leveler pit and in the driveway in front of the pit while installing maintaining or repairing the dock leveler Power to control box mu
9. April 2013 RAISE Pump starts needle valve shifts Bumpers Retract Main lift cylinder extends and lip cylinder retracts Pilot check valve opens When Leveler Fully Raised Pressure Increases Sequence valve shifts e Lip cylinder extends RAISE Button Released Sequence valve and needle valve return Leveler floats down forcing fluid into reservoir Lowering speed controlled by flow control in needle valve When ramp is supported by vehicle floor bumpers extend LIP EXTEND With leveler above dock height pump starts as above Solenoid valve SV5 is de energized locking maincylinder in partial raised position Pressure increases sequence valve shifts and lip extends STOP Button Pressed Solenoid valve SV5 is de energized locking main cylinder and lip cylinder Power cut off from motor circuit Communications light Light illuminates when power is applied to motor circuit Light will flash when bumpers fail to engage 6003935D 60 80K Hydraulic Dock Leveler 15 2013 4Front Engineered Solutions Inc OPERATING INSTRUCTIONS LEVELER Before operating the dock leveler read and follow the Safety Practices on page 3 Use by untrained people can result in death or serious injury Read and follow complete operating instructions DO NOT USE DOCK LEVELER IF IT LOOKS BROKEN OR DOES NOT SEEM TO WORK RIGHT Tell your supervisor it needs repair right away Al
10. CONTROL PANEL continued THREE PHASE UNITS Part Description 208V 230 240V 460 480V 575 600V Part 3PH 3PH 3PH 3PH Number BAR GROUND 6000559 4 BLOCK FUSE 1 POLE FINGERSAFE 6006849 BLOCK FUSE 2 POLE FINGERSAFE 1 1 1 1 6006850 5 FUSE TIME DELAY 2A FNQ R 2 FUSE TIME DELAY 1A FUSE TIME DELAY 1 2A FNQ R 1 FNQ R 1 2 F F 2 O1 E MDAC E 3 iB ERN Sie 12 PILOT LIGHT AMBER NEMA 4 4 13 1 13 LIGHT MODULE AMBER WITH BASE 1 15 IECCONTACTOR NR 0 5 7 5HP 9A 1 OVERLOAD RELAY 1 6 2 5 AMP PANEL DECAL SERCO PANEL DECAL KELLEY E UN 3 1 PB MUSHROOM NEMA 4 4X 13 6000473 6007884 22 Pte 100 2807 28 TERMNAL2POLE 3 2 Je 1 1 1 1 1 1 1 1 1 1 1 1 8 1 1 1 1 1 1 1 6000457 1 1 1 1 1 8 54 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc LIMITED WARRANTY INFORMATION THIS LIMITED WARRANTY IS 4FRONT S SOLE AND EXCLUSIVE WARRANTY WITH RESPECT TO THE DOCK LEVELER AND IS IN LIEU OF ANY OTHER GUARANTEES OR WARRANTIES EXPRESS OR IMPLIED 4FRONT warrants that this DOCK LEVELER will be free from flaws in material and workmanship under normal use for a period of one 1 year from the earlier of 1 60 days after the date of initial shipmen
11. PS2 100 PSI 6 E BUMPER Sv3 CYLINDERS 1 5 LH 1 SV1 EL RV3 x 111 3000 PSI 3 J CV1 8 iH 4 2 ES 504 5 2 7 PS1 4 1000 PSI A LIP CYLINDERS Lj C2 C1 6 SAE 6 SAE 6 SAE cv2 13 PSI svs A PORT 4 LIP ADJUST RE NEUE NEEDLE cvi 1000PSI VALVE 2 Cesssenssas 7 te Open 1400 5 MEM eee d SES 71 1 RV2 60 PSI 1 9 GPM S Omi LL LL LU VERSA HYDRAULIC SCHEMATIC HIGH CAPACITY DUAL CYLINDERS APPLICATION 3 BUTTON CONTROL w 1 Solenoid Valve in Delta port amp 4 Valve Auxiliary Manifold 6003935D 60 80K Hydraulic Dock Leveler April 2013 Fig 29 J box A input to sensors 24VDC Home run cable A to control panel Motor power j box JUNCTION BOX ELECTRICAL J box B output to solenoids 24VAC Home run cable B to control panel Ee 4 o PS WIRING 1 2 o 2 gt 2Sa 2 2 4 LS1 SV5 4 gt 4 gt SV WIRING 1 gt e on een 4 gt 2 x 25 e SV4 4 1 1 2 gt 4 2 gt 4 PS2 3 56 4 d i 1 1 M 2 gt 2 gt 3 e INPUTS PS1 4 gt B outputs SUL S SENSORS amp SWITCHES SOLENOID VALVES 10 24 VDC CIRCUIT 24 VAC CIRCUIT 1 WHITE PS1 1 WHITE SV1 2 GREEN 52 M 2 EON RIS 123456
12. Replace coil as needed c Check continuity of pressure switch PS2 when leveler is raising a Check for 24VAC at SV1 SV2 and SV3 terminals in control panel There should only be 24VAC at SV2 and SV3 b Check for magnetism at valve coils on SV1 SV2 and SV3 There should be magnetism for SV2 and SV3 Use a screw driver or other steel object Replace coil as required c Check continuity of pressure switch PS2 when leveler is raising a Check max pressure setting with gauge on main cylinder circuit Adjust pressure setting if necessary as described on page 25 Check continuity of pressure switch PS1 May have a faulty connection or wire Make sure all plugs are properly routed and seated b Replace PS1 pressure switch April 2013 SECONDARY MANIFOLD ADJUSTMENT LA WARNING Before servicing the dock leveler read and follow the Safety Disconnect power and properly tag or lock out to prevent Practices on page 3 Failure to do so could result in death or accidental operation while making adjustments serious injury Do not work under the dock leveler ramp or lip unless both maintenance struts are securely supporting the leveler and the lip maintenance bar is supporting the lip Fig 25 SV3 PS1 1000 PSI Port 4 Port 2 to pump C1 to bumper ret Port 8 Port 6 to pump C2 to main cyl PS2 RV3 3000 PSI Port 5 Poner ret to tank to lip ext sv4 a Port 1 to bum
13. a a aan ea ale os LEVELER 52 d MOTOR L 5031 V essel etie cese OY posse 3 2A 230V 60HZ TB1 513 573 G MOTOR_DETAIL E 200 240V THREE PHASE 50 60HZ GN e I NOTE T3 i 12 2 4 Power to control box must weet H gt be from fused disconnect 7 supplied by others Fuse size be no greater A2 NOTE VISUALLY CONFIRM MOTOR TAG that the CB FU size shown PUSO above for dual element m 1 time delay fuses DETD p All electrical work must NEUE H49H5 TERMINAL BLOCK STRIP AKA meet all applicable codes 6o n R XTS All devices shown in de me le aaa 1 energized state 10241 Y 10251 10271 L2 13 C C 15 2 3 17 18 20 21 ov 2AVAC from 1027 Ned 51 10271 S2 MOV 54 120VAC NEUTRAL from 1024 from 1025 6 MOV S5 10241 10251 N 9 L WIRE LEGEND N PANEL WIRING rae FIELD WIRING BY OTHERS PC BOARD TRACES NOTE TERMINALS WILL ACCEPT STRANDED WIRE ONLY WIRE COLOR GAUGE NFPA unless otherwise specified 208 600 14 BLK 1 20VAC 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 418 VIO WHT DRY UNPOWERED 18 YLW 34 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC 460 480V 3PH 60HZ
14. 20 21 ov 24VAC 1027 yoy 3i 10271 MOV S2 MOV S4 120 4C NEUTRAL 6 tic E from 1024 from 1025 10241 10251 N Gy N WIRE LEGEND N PANEL WIRING See ss FIELD WIRING BY OTHERS PC BOARD TRACES NOTE TERMINALS WILL ACCEPT STRANDED WIRE ONLY 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 24 COM OVDC 18 BLU WHT 12VAC VDC 18 VIO 12V COM 18 VIO WHT DRY UNPOWERED 218 YLW 36 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC PLC OUTPUT j 10001 Fig 36 to x22 x 1 9 PLC1001 WIRE LEGEND 1244 1025 L1 Es x22x 1 9 PANEL WIRING oL Ty 10252 2 NEUTRAL e aa FIELD WIRING BY OTHERS PC BOARD TRACES N TBI 10003 E to x21 x 1 9 Qa pua MT RY OUT 10271 CM SER Q 0 PILOT 10301 Ed YAN Ay 2 3 RY OUT PB1018 E 103311 11018 2 2 4 M1034 10341 10342 M1054 LEVELER 1 AN 95196 CONTACTOR X XC X 1 2 10351 SS 10352 NOTOR 2 CONTACTOR 2 10361 BUMPER CONTROL 4 No 1042 10281 T 10371 Eo
15. PANEL WIRING FIELD WIRING BY OTHERS PC BOARD TRACES NOTE TERMINALS WILL ACCEPT STRANDED WIRE ONLY 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 DRY UNPOWERED 18 YLW NEUTRAL from 1025 10251 S ADANGER ERMINAL BLOCK STRIP AS BUILT LAYOUT PER PANEL 1 L1 51 52 54 55 2 5 17 18 20 21 ov 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 30 2013 4Front Engineered Solutions Inc 6003935D 60 80K Hydraulic Dock Leveler April 2013 Fig 31 PRIMARY FUSING AND DISCONNECT PANEL FLA 9 SCCR SKA ELECTRICAL SCHEMATIC 208V 1PH 60HZ BY OTHERS
16. 10372 URN AMORE r RED TEL RY OUT id El COM 2 M CE WHT 2 PER 1 WHEN RETRACTING en ow 8 8 tonal v2 CH or WHEN EXTENDING RY OUT H 9W 7 COM 3 E9 WHEN EXTENDING ERU OW 9 EN IP VENT 9 pes 0 WHEN EXTENDING 2 9W 4 J4 Soe dt MA FU1042 B ES LIP OUT WHEN OFF S MEE 0421 SUP 10422 s2 un QW 1 1036 1 59 224 COMPOSITE CABLE BUMPER GRY CONTROL d x FU1044 1 10441 154 Ov April 2013 6003935D 60 80K Hydraulic Dock Leveler 37 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC PLC INPUT Fig 37 1024 TWIDO COMPACT PLC1001 10021 10022 27 2 OV 10031 DC IN COM 1 05 0 2 10051 e 304 D RAISE LIP EXTEND PB1006 HEN 1 Q LIP EXTEND BRN E 2 Pd 2 10071 BUMPER PRESSURE 2 PNK TS MON XL 2 FULLY EXTENDED EXTEND a PL oq L PS1 i um Buca 8k 3 10081 2 BUMPER PRESSURE iig TS Em 2 FULLY RETRACTED RETRACT R L PS2100psi ST I I COMPOSITE CABLE 4 AUTO RETURN DOCK 1120 U PRS1010 B 9 5 1102 Q J4 l BLU 4 RED a OEC exo iw 2 TB1
17. 7 8 C 17 4 FACTORY JUMPER NOTE 1 i 10131 Q DOOR OPENED FACTORY JUMPER NOTE 2 18 10141 5 RESTRAINT ENGAGED TB1 TB1 0 FACTORY JUMPER NOTE 3 20 10161 2 SNUGGING ENABLED TB1 TB1 21 10171 5 ARTD SENSOR YLW 4 es AUTOMATIC RETURN TO DOCK 01 3 Toz 10181 Q STOP 1033 WIRE LEGEND PANEL WIRING SS eem FIELD WIRING BY OTHERS PC BOARD TRACES 38 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc Fig 38 CONTROLLER FAULT CONDITIONS RUN LED green Application not executed Controller is in RUN mode F Controller is in STOP mode or execution fault HALT ERR LED red Internal faults watchdog etc F Application not executable or execution error HALT STAT LED reen O Controlled by the user or application through system bit 7 569 Controlled by the user or application through system bit 75569 F Program transfer in progress SS SS SSSSSSSSSSSSSG c0 12345967 8 9 10111213 Ies W 50456 7 ooo jo2000020020200000 Z 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 PLC STATUS INDICATORS
18. C1 port to manifold 4 Sequence valve 1000 psi Needle valve Return to tank C3 port lip retract Relief valve RV1 1400 psi 26 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc HYDRAULIC POWER UNIT ADJUSTMENT A WARNING Fio 27 Before servicing the dock leveler read and follow the Safety Practices on page 3 Failure to do so could result in death or serious injury ADANGER Disconnect power and properly tag or lock out to prevent accidental operation while making adjustments Hecate Do not work under the dock leveler ramp or lip unless mangy Q both maintenance struts are securely supporting the leveler and the lip maintenance bar is supporting the lip Pressure gauge 2000 PSI min Versa test gauge test locations a Main cyl port 6 or input main std test location b Lip cyl ort 7 C Bumpers fort 3 Primary Relief Valve RV1 Controls maximum pressure in the hydraulic Loosen jam nut Turn screw clockwise to system and protects the other components increase relief pressure Relief pressure will from excessive force be factory set at 1400 PSI and should not require adjustment Requires use of hydraulic pressure gage Flow Control and Needle Controls the lowering speed of the ramp and Loosen jam nut Turn the screw clockwise to valve directs fluid to the main cylinders when th
19. RETURN TO DOCK A R T D OPERATIONS The A R T D automatically resets the leveler whenever a vehicle pulls away from the loading dock with the lip resting on the vehicle This is how it works 1 April 2013 If the vehicle pulls away the leveler will float down to the lowest position and the lip will fall The bumpers will retract Then the leveler will automatically raise retract the lip then float down to the stored position The bumpers will then extend Fig 21 Press to raise Release to lower a Fig 22 Press to raise Press to extend Float down 6 Lip extend eae 222 Fig 23 60039350 60 80K Hydraulic Dock Leveler 17 2013 4Front Engineered Solutions Inc PLANNED MAINTENANCE To ensure the continued reliable operation of your dock leveler perform the following planned maintenance procedures Before servicing the dock leveler read and follow the Safety Practices on page 3 and the Operating Instruction section in this manual Place barricades on the dock floor around the dock leveler pit and in the driveway in front of the pit while installing maintaining or repairing the dock leveler ADANGER Be certain before climbing into the pit or doing any maintenance or repair under the leveler that 1 Both maintenance struts are securely supporting the ramp in the event it could fall or be accidently lowered 2 The power is disconnected a
20. SO 14 4 X 48 LG 172607 SERRATED FLANGE HEX LOCKNUT 5 16 18UNC ZP 6010661 5 16 18UNC X 1 LG ROUND HEAD CARRIAGE BOLT ZP 6010662 FTG MALE EL 6 JIC M X 3 8 NPT M STL 6012940 VALVE PRESS SEQ DIRECT ACT CARTRIDGE 6011698 VALVE NEEDLE CARTRIDGE ADJ SAE 4 THRD NV 6011699 April 2013 6003935D 60 80K Hydraulic Dock Leveler 51 2013 4Front Engineered Solutions Inc PARTS LIST CONTROL PANEL Fig 47 VERSADOIK EAEYDRAULHIG DOCK I LER Release STOP Push In and hold to retract bumpers and raise dock levolar Lip will extend when jevelar ts fully raised Release lower dock lavaler em acte i i DOO With leveler raised above dock push to extend pinte Extend gt Release st desired lip extension Power On NNI 43 __ zu STOP uel button in Push STOP in O Push into stop O Pulltorelease abe U U N 5j OO HH U Telemecanique Me D olot 285 H B e e loo lao
21. lip will fully retract and the target bracket will be forced away from the proximity switch The motor will stop and the leveler will float down until the lip rest in the keepers 4 40 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc AUTO RETURN TO DOCK A R T D ADJUSTMENT ADANGER Do not enter the leveler pit unless the leveler is securely supported by maintenance struts and barriers are in place Failure to do the following could result in death or serious injury NOTE Secure the leveler in maintenance position with lip pendent Proximity Switch 1 Adjust the proximity switch so the sensor face is 1 16 above the edge of the mounting bracket See Fig 37 Tighten the sensor jam nuts Target 1 The target bracket is mounted on the lip cylinder clevis and is designed to pivot with some friction The clamp holds the target in place against the clevis See Fig 40 Tighten the he clamp bolt so the target is free to rotate but holds its position if released NOTE Lip must be fully retracted for the following step Target Adjustment Bolt 1 Loosen the target adjust bolt and rotate the target until the sensor LED illuminates The head of the target adjustment bolt should be touching the sensor bracket Adjust the bolt until the ARTD sensor LED extinguishes Add 1 8th turn Tighten jam nuts 2 Confirmthe target
22. the dock leveler with anyone standing on or in front of it Always keep hands and feet clear of all moving parts Always restore the dock leveler to its safe dock level storage position after servicing the vehicle Keep away from the dock leveler lip and bumpers when the raise button is pressed or released The lip and dock leveler are free to move and the bumpers move automatically when pressure is applied and or released Press to raise Fig 18 ka TARAS Press to extend lip Fig 19 AD Lip extend ad Release to lower Float down April 2013 OPERATING INSTRUCTIONS continued STORING LEVELER 1 To return the leveler to the stored position press the RAISE button The bumpers will retract and the leveler will raise As the leveler raises the lip will retract When the lip is fully retracted release the RAISE button The leveler will float down to the stored position When the leveler is stored the bumpers will extend If the dock leveler is interlocked to a vehicle restraint then the bumpers will extend again when the vehicle restraint is released BELOW DOCK END LOADING 1 Press the RAISE button until leveler is about 6 above dock The bumpers will retract before the leveler starts to raise Press LIP EXTEND button until the lip has cleared the front of the keepers and release the button Leveler will float down for end loading AUTO
23. 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 DRY UNPOWERED 18 YLW April 2013 6003935D 60 80K Hydraulic Dock Leveler 2013 4Front Engineered Solutions Inc 35 ELECTRICAL SCHEMATIC 575 600V 3PH 60HZ Fig 36 PRIMARY FUSING AND DISCONNECT BY OTHERS LEVELER PANEL FLA 2 CONTACTOR SCCR 14 as M1034 17A POY EER t TL1 2 8021 MOT802 MR EE D UE L 8031 LOW r9 ERR 1 24 575V 60HZ TBI 515 ers G eA se Ree ae ee dj BP MOTOR DETAIL 2 600V THREE PHASE 60HZ RD T3 NOTE Power to control box must Wi 2 from fused disconnect BK supplied by others Fuse l l 9 size can be no greater NOTE VISUALLY CONFIRM MOTOR TAG that the CB FU size shown peeve above for dual element time delay fuses DETD eet te E All electrical work must nee H2 H4 H5 TERMINAL BLOCK STRIP meet all applicable codes 600 180 219 08 R xen rM E All devices shown in de eel TB energized state 2 10251 10271 12 13 C C C C 2 3 17 18
24. Dock Leveler 9 2013 4Front Engineered Solutions Inc INSTALLATION continued Hydraulic pressure must be maintained on the ramp or a suitable lifting device needs to hold it in the raised position until the maintenance struts are securely in place DO NOT WORK UNDER THE DOCK LEVELER RAMP OR LIP UNLESS BOTH MAINTENANCE STRUTS ARE SECURELY SUPPORTING THE LEVELER AND THE LIP MAINTENANCE BAR IS SUPPORTING THE LIP 6 Using a pry bar pry up the rear frame one side at a time Stack 4 x 4 steel shims of the appropriate thickness centered underneath each of the 7 rear hinge supports and between the rear frame and the rear pit wall at each of the positions shown in Fig 5 7 Check the alignment of the top of the subframe and the top of the rear pit curb angle The top of the subframe should be flush with the top of the rear pit curb angle If a flush condition cannot be achieved the frame should be a maximum of 1 16 lower than the curb angle Add or subtract shims as required 8 Place4 x4 steel shims ofappropriate thickness between the lifting cylinder mounting pads and the pit floor See page 5 NOTICE Before welding the rear frame cover the weather seals with a sheet of steel to prevent setting fire to the weather seals Failure to do so may result in property damage Welding with the dock leveler s power connected can damage electrical components If the dock leveler has previously been electrically connected turn o
25. Hydraulic Dock Levelers 60 80K Capacity 8 10 12 iaa R SADOCK HYDRAULIC DOCK LEVELER This manual applies to VERSADOCK manufactured beginning February 2013 with serial numbers 61022323 and higher ET User s M Do not install operate or service this product unless se r S a n u a you have read and understand the Safety Practices Instal ation Op erations Warnings and Operating Instructions contained in this User s Manual Failure to do so could result in death or M al ntenance and P a rts serious injury Part No 6003935D TABLE OF CONTENTS 4 2 02 2 Safety Signal WOD IS eed 2 TTE 3 Owner s Responsibilities 4 Ramp And Lip 5 Pit em 6 Installation 2 4 2 600500000000 6 Service Tools 00 0 13 Components And Specifications 14 Hydraulic System 15 Operating Instructions Leveler 16 Planned 18 Trouble Shooting 21 Secondary Manifold Adjustment 25 Hydraul
26. Leveler does not raise Motor a Low fluid level in reservoir runs b Solenoid SV5 Malfunction c Pump not running or pressure insufficient d Pump running in reverse Three phase only e Primary relief valve setting too low 5 Overload relay tripping a Overload relay set too low b Loss of 1 phase Three phase only 6 Leveler will not lower a Automatic safety stop velocity fuse is locked 7 Leveler floats down too slowly a Needle valve requires adjustment SOLUTION a Check fluid level with leveler fully raised Add fluid if required and check for leaks See page 15 for correct fluid level b Check for magnetism at valve coil on SV5 24 VAC should be present in SV5 Replace if necessary c Remove the hose from main lift cylinder and point free end into reservoir opening If no oil is pumped check pump drive shaft coupler or replace pump d Check motor rotation and reverse electrical connections if necessary Set primary relief valve setting to 1400 PSI a Check full load amperage and overload relay setting Set overload relay dial to current indicated on motor nameplate b Check for voltage at all three motor connections T1 T2 T3 in control panel a If load was on the leveler remove the load and jog the RAISE button to unlock the leveler If no load was on the leveler adjust the needle valve to reduce drop speed a Adjust needle valve for faster flow Turn co
27. NOTICE Disconnect power and ground before welding 9 When the top of the rear frame has been leveled with the rear pit curb angle place 3 x 12 steel shims of the appropriate thickness underneath the front of the leveler subframe and the maintenance struts supports These shims should be flush with the front of the leveler frame below or behind the lip keepers After verifying that both sides of the dock leveler are evenly spaced to the pit sides finish weld the rear frame angle to the pit rear curb angle See Fig 9 and 5 10 Weld front of frame to shims and shims to front curb angle with 3 long welds on the front and sides of the shims NOTICE Shims must be welded in under the maintenance strut brackets and lip keepers and between the back frame and pit back wall 11 Weld rear hinge support shims together and to the dock leveler subframe under each rear hinge support All welds are to be 1 long minimum 12 Reconnect power and ground April 2013 IN STALLATION continued Fig 9 6 long welds centered over each hinge x7 and 3 welds at each end of rear angle Level with floor Shim under lip keepers and maintenance posts Front frame not parallel to rear frame Fig 10 IMPROPER INSTALLATION x PROPER INSTALLATION LE Front frame parallel to rear frame lip touching both lip keepers
28. STAGE TOE GUARD RH NOT SHOWN 5862740 15 1 2ND STAGE TOE GUARD LH 5862739 16 2 BUMPER BLOCKUP UHMW 6003040 17 11 PIN REAR HINGE 6003855 19 STS 12 14 X 3 4 TEKS NOT SHOWN 215702 215702 215702 April 2013 6003935D 60 80K Hydraulic Dock Leveler 43 2013 4Front Engineered Solutions Inc PARTS LIST DOCK LEVELER continued 24A SERCO NAMEPLATE SMALL 824002 24B KELLEY NAMEPLATE SMALL 921140 00 2099 277 15412 A o gt GN 6 UR EM 5 LIP KEEPER 18 LIP 6005688 6005682 6005685 44 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc PARTS LIST HYDRAULIC AND ELECTRICAL Fig 42 8 assemblies hose 24 10 and 12 assemblies hose 24 to main cylinder route is down to main cylinder route is up April 2013 6003935D 60 80K Hydraulic Dock Leveler 45 2013 4Front Engineered Solutions Inc PARTS LIST HYDRAULIC CYLINDERS AND HOSES Fig 43 m o Pd 11 Lo oof Pp I
29. T 8 5222 123456 1 8 2900 GREY 2 a E 24VDC gt gt O O 5 in gt 2255 ADEs 8 RED COM DC lt lt lt lt RED NEUTRAL lt lt lt lt April 2013 6003935D 60 80 Hydraulic Dock Leveler 29 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC 120V 1PH 60HZ Fig 30 PRIMARY FUSING AND DISCONNECT BY OTHERS LEVELER MOTOR PANEL FLA 16 ion CONTACTOR SCCR SKA id Cc M1034 16 igi gee EIOS TL1 10251 uz CQ ME M M ae X TB1 3L2 JUMPER sis FOU gg Power to control box must be from fused disconnect supplied by others Fuse size can be no greater that the CB FU size shown above for dual element time delay fuses DETD All electrical work must meet all applicable codes All devices shown in de energized state o T 10241 MOT101 LEVELER a 3 MOTOR 1 13 6a 115v 60HZ zz d S450RPM MOTOR DETAIL 110 115V SINGLE PHASE 8 2 5 GN L1 BK J E WH NOTE VISUALLY CONFIRM MOTOR TAG HIS 554 023 240 120 P 7 XEA11 24V SEC 350VA 10271 x2 24VAC from 1027 10271 120 from 1024 10241 WIRE LEGEND
30. chain or other lifting devices are in good condition and have a rated capacity of at least 8000 Ibs for the lifting angle used Never allow anyone to stand on or near the dock leveler when it is lifted or placed into the pit Stand clear of the dock leveler when it is placed into the pit Failure to follow this warning can allow the dock leveler to fall tip or swing into people resulting in death or serious injury 2 Hold the leveler closed with the bolt s through the lip plate and or shipping banding securing the lip plate to the frame Install four 3 4 10 load centering eye bolts do not use conventional 1 piece eyebolts into the front and rear of the ramp see Fig 6 and hoist the leveler into the pit The dock leveler should not be lifted in any other manner when placing into the pit See Fig 6 and 7 Move the dock leveler back to the rear pit angle With the rear leveler angle touching the rear pit angle square up the sides of the pit to the sides of the leveler The gap should be even on both sides The rear frame angle should be within 1 8 on either sides of the pit curb angle See Fig 8 and 9 4 Remove the bolt s and or shipping banding from the lip plate 5 Use a chain or suitable lifting device to lift the leveler ramp up and place the leveler ramp securely on both maintenance struts April 2013 Fig 5 IN STALLATION continued Shim to the back of pit wall 6003935D 60 80K Hydraulic
31. e decrease drop speed Adjust lowering speed pump is running to match leveler raise speed Sequence Valve Controls lip plate retraction and extension Loosen jam nut If the lip extends before the deck is fully raised the valve should be turned clockwise Tightening the valve too far will cause very slow lip extension or no extension at all Solenoid Valve SV5 Stops the lowering of the ramp when either No adjustment is required the LIP EXTEND or EMERGENCY STOP button is pushed Secondary Relief Valve Controls the force and speed of lip retraction Loosen jam nut If the lip is closing too RV2 when the power unit is running Does not forcefully turn the adjusting screw clockwise effect speed of lip closing when power unit is not running April 2013 6003935D 60 80K Hydraulic Dock Leveler 27 2013 4Front Engineered Solutions Inc HYDRAULIC SCHEMATIC Fig 28 28 g 1 H E r E zr I um VELOCITY FUSE MAIN CYLINDERS 2013 4Front Engineered Solutions Inc
32. e See Fig 24 for locations Do not over grease For lip stop when grease begins to ooze out of the hinge tube ends For bumpers place a small layer of grease on the sliding surfaces of each bumper over a 5 x 6 area as located in Fig 24 while bumpers are fully extended Wipe off excess grease 18 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc PLANNED MAINTENANCE continued Fig 24 Legend Symbol Lubricate Oil Light oil SAE 30 Lubricate Grease Molybdenum disulfide NLGI 2 Cleaning Location frequency Visually Inspect Replace damaged or worn Lip recess weekly Lubricate all hinges 7X easiest to lubricate in full below dock position Inspect toe guards quarterly hydraulic reservoir level quarterly Check oil level to top of fill hole 1 x 4 1 2 x 1 4 April 2013 6003935D 60 80K Hydraulic Dock Leveler 19 2013 4Front Engineered Solutions Inc PLANNED MAINTENANCE continued Every 90 days quarterly inspect all safety labels and tags to ensure they are on the dock leveler and are easily legible If any are missing or require replacement please call 1 800 525 2010 or 972 466 0707 for replacements 6008485 x2 A DANGER SAFETY INFORMATION Manual activation of the lim
33. e not b Check adjustment of proximity switch properly adjusted and lip target arm Refer to adjustment procedure on pages 35 36 a Incomplete circuit to solenoid valve a Check electrical connections to switches and solenoid b Solenoid valve SV4 malfunction b Check for magnetism at valve coil Use a screwdriver or other steel object Replace valve coil as required c Solenoid valve SV4 is incorrect c Confirm SV4 is a NC valve and has the correct part number noted in the auxiliary manifold parts list on page 6003935D 60 80K Hydraulic Dock Leveler 23 2013 4Front Engineered Solutions Inc TROUBLESHOOTING GUIDE continued PROBLEM 13 Bumpers do not retract 14 Bumpers do not extend 15 Pump does not shut off after bumpers extend 24 2013 4Front Engineered Solutions Inc POSSIBLE CAUSE a Incomplete circuit to solenoid valve b Solenoids SV1 SV2 or SV3 malfunction c Pressure switch problem a Electrical problem b Solenoid valve SV1 SV2 or SV3 malfunction c Pressure switch problem a PS1 pressure switch problem b PS1 pressure switch faulty 6003935D 60 80K Hydraulic Dock Leveler SOLUTION a Check for 24VAC at SV1 SV2 and SV3 terminals in control panel 24 VAC should be present at SV1 b Check for magnetism at valve coils on SV1 SV2 and SV3 There should be no magnetism at SV2 and SV3 Use a screwdriver or other steel object
34. ed 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 DRY UNPOWERED 18 YLW NEUTRAL from 1025 10251 NOTE VISUALLY CONFIRM MOTOR TAG ERMINAL BLOCK STRIP 2o Q AS BUILT LAYOUT PER PANEL 1 12 C C C 2 3 17 18 20 21 ov uo si Qi s 0907 54 N N N N 32 6003935D 60 80K Hydraulic Dock Leveler 2013 4Front Engineered Solutions Inc April 2013 ELECTRICAL SCHEMATIC 208V 3PH 60HZ Fig 33 PRIMARY FUSING AND DISCONNECT BY OTHERS LEVELER PANEL FLA 5 ONTACTOR SCCR 5KA 4011 M1034 5 Re Sey S ee Bl E ia sc MR CC EE 12 4021 MOT40 eae B sat eurer D L3 4031 i 4 i t 5131 9 4 i 40208 60 7 iL MOTOR DETAIL z 200 240V THREE PHASE 50 60HZ GN e I 13 3 E NOTE Rc EUN Power to control box must Bk QS be from fused disconnect supplied by others Fuse size can be no greater NOTE VISUALLY CONFIRM MOTOR TAG that the CB FU size s
35. ff power to control box before welding and disconnect the ground wire s Ground welder to dock leveler frame Failure to do so may result in property damage Be certain that the rear frame is touching the rear pit curb angle before welding Note At this point the electrician should complete the wiring between the control panel and the junction box With electrical power available return the leveler to the stored position Shim the front end of the dock leveler LEVEL with the rear frame of the leveler If front and rear pit curb angles are not parallel do not attempt to shim dock leveler supports to match pit angles The lip keepers and lip plate must be parallel for proper operation of the dock leveler Add or subtract shims as required See Fig 9 and 10 10 6003935D 60 80K Hydraulic Dock Leveler 2013 4Front Engineered Solutions Inc Weatherseals Telescopic toe guards retracted Hold closed with bolt or metal anding b Rear curb angle entries ms 4 x height Fig 8 Pit side curb angle Ramp tk 1 2 a 4 1 2 1 i Rear pit curb angle maar rame angie April 2013 NOTICE If the pit is out of square the resulting gap between the rear frame and the rear curb angle should be shimmed as necessary at the weld locations Use steel shim s equal to the weld length and weld in place See Fig 9 and 10
36. h voltage Control panel Inside wall Rear curb angle 3 4 conduit for Face curb i vehicle restraint angle assembly FS Embed plate for Optional vehicle restraint flush with dock face Front curb angle assembly 4 Optional Anchor layout for curb angles 3 i 4 1 4 Projected pit for sloped driveways See chart on next page for pit projection Concrete anchors 1 2 dia x 6 long 6 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc IN STALLATION continued PIT LAYOUT continued Important Concrete behind pit steel must be well vibrated We recommend an 8 minimum thickness for pit walls pit floor and dock face Pit projection guide for drive conditions Notice Driveway survey should be complete to determine grade and pit projection Side curb angles must be 90 to dock face and to rear curb spi de coos All angle joints to be welded securely Pit Projection aas ron g e J y inehes 2 3 5 10 114 12 Consult the factory for dock heights under 42 or over 50 Notice Pit dimensional tolerances are 1 8 on squareness depth width and length 4Front Engineered Solutions Inc assumes no responsibility for deviations beyond these tolerances Nominal Size L x W 10 x 9 12 x 9 A B Pit Width 109 2 29 Front Depth Rear Depth
37. holds position With the adjustment bolt touching the bracket and the sensor LED extinguished April 2013 Fig 40 bracket Clamp bolt ARTD cable Target Sensor led Gamp ARTD sensor Lip sensor Target Target adjustment bolt Clamp bolt Lip cylinder ARTD sensor Target clamp ARTD target 6003935D 60 80K Hydraulic Dock Leveler 41 2013 4Front Engineered Solutions Inc PARTS LIST DOCK LEVELER Fig 41 To ensure proper function durability and safety of the product only replacement parts that do not interfere with the safe normal operation of the product must be used Incorporation of replacement parts or modifications that weaken the structural integrity of the product or ina way alter the product from its normal working condition at the time of purchase from 4Front Engineered Solutions Inc could result in product malfunction breakdown premature wear death or serious injury 42 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc PARTS LIST LEVELER continued 1 1 FRAME ASSY DOCK LEVELER 60K 20 LIP 6004702 1B FRAME ASSY DOCK LEVELER 60K 18 LIP 6005527 ee 12 1ST STAGE TOE GUARD RH NOT SHOWN 5862738 13 2ND
38. hown above for dual element time delay fuses DETD All electrical work must TERMINAL BLOCK STRIP meet all applicable codes AS BUILT LAYOUT PER PANEL All devices shown in de 181 energized state 12 13 H19H2o 9 44 45 600 480 240 s08V PRI 411 SEC 200VA C N X1 2 X2 10241 2 10251 10271 17 18 20 24VAC from 1027 10271 120VAC from 1024 10241 WIRE LEGEND PANEL WIRING ETAT FIELD WIRING BY OTHERS PC BOARD TRACES NOTE TERMINALS WILL ACCEPT STRANDED WIRE ONLY 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 24 COM OVDC 18 BLU WHT 12VAC VDC 18 VIO 12V COM 18 VIO WHT DRY UNPOWERED 18 YLW NEUTRAL from 1025 10251 April 2013 6003935D 60 80K Hydraulic Dock Leveler 33 2013 4Front Engineered Solutions Inc ELECTRICAL SCHEMATIC 230 240V 3PH 60HZ Fig 34 PRIMARY FUSING AND DISCONNECT BY OTHERS LELER PANEL FLA 5 CONTACTOR SCCR 5KA d 5011 M1034 42 ay ets 2 5021 MOT502 ur C Ten
39. ic Power Unit Adjustment 26 Hydraulic Schematic 28 Junction Box Electrical 29 Electrical Schematics 30 Auto Return to Dock Operations 40 Auto Return to Dock Adjustments 41 Parts Els icr rre re een a 42 Warranty Informeliorn 55 Distributor Information 2 2 222120244 56 INTRODUCTION Welcome and thank you for buying this dock leveler from 4Front Engineered Solutions Inc This User s Manual contains information that you need to safely install operate and maintain the dock leveler and bumpers safely 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 dock leveler 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 i
40. in Release the RAISE button and leveler will lower to securely supported position resting on both maintenance struts 2 Tolower both maintenance struts from its locked upright position two people are needed a April 2013 Push and hold the RAISE button on the control panel Pull out hitch pin and clevis pin from top hole on lip maintenance bar bracket and lower lip maintenance bar Reinsert clevis pin through brackets and then put hitch pin in clevis pin to store Lift up and then push back to lower both maintenance struts Release the RAISE button SERVICE TOOLS Fig 13 Fig 14 ADANGER It is important to always engage the lip maintenance bar mechanism when ever working under the leveler with the lip extended Any upward force on the lip could release the lip latch bar allowing the lip to fall 6003935D 60 80K Hydraulic Dock Leveler 13 2013 4Front Engineered Solutions Inc COMPONENTS AND SPECIFICATIONS Dock Leveler The main components of the leveler are shown below See the Parts List for specific part numbers Fig 15 i i i ip hi Ig Lip plate ARTD sensor Lip sensor stop Lip hinge Bumper Top plate Lip maintenance bar Lip cylinder Lip cylinder Bumper cylinder Bumper cylinder Safety stop veloc
41. injury resulting from use of unauthorized replacement parts or modification of the DOCK LEVELER 4FRONT s sole obligation with regard to a DOCK LEVELER 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 A WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE ALL OF WHICH 4FRONT HEREBY DISCLAIMS April 2013 6003935D 60 80K Hydraulic Dock Leveler 55 2013 4Front Engineered Solutions Inc Please direct questions about your hydraulic dock leveler to your local distributor or to 4Front Engineered Solutions Inc Corporate Head Office Your local 4Front Engineered Solutions Inc distributor is 1612 Hutton Dr Suite 140 Carrollton TX 75006 Tel 972 466 0707 Fax 972 323 2661 2013 4Front Engineered Solutions Inc Part No 6003935D
42. it switch will start the motor Disconnect power before making adjustments Refer to User s Manual for proper maintenance procedures 921 075C to user s manual for proper maintenance procedures 921 074 x2 A DANGER CRUSH HAZARD Do not work under dock leveler unless this maintenance strut has been secured in the upright position See user s manual for proper procedures 921 074E OPERATIONS 6003122 LJ WARNING AND OPERATION PLACARD MOUNTED ON WALL NEAR LEVELER 20 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc Before servicing the dock leveler read and follow the Safety Practices on page 3 and the Operating Instruction section in this manual PROBLEM 1 Leveler does not raise Motor is silent b Electrical connections incorrect or broken 2 Leveler does not raise motor starts then stops motor starter relay chatters tripping out b Voltage drop due to long wiring distance from power source 3 Leveler does not raise Motor hums a Voltage drop b Loss of 1 phase Three phase only 4 Bumpers fail to extend b PS1 pressure switch faulty April 2013 POSSIBLE CAUSE a No electrical power to control panel a Overload relay main circuit breaker or leveler control circuit a Hydrau
43. ity fuse Hydraulic power unit Maintenance strut Maintenance strut Lip keepers ramp stops Main lift cylinders Subframe Fig 16 Control Panel DANGER MEPSADOCK HYDRAULIC DOCK LEVELER Leveler raise Lip Extend Lip extend Stop 14 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc COMPONENTS AND SPECIFICATIONS Control Panel NEMA 12 automatic motor starter thermal overload 2 amp resettable control circuit breaker U L approved Auto Return to Dock Proximity Switch NEMA IP68 normally open with LED pilot light Motor NEMA Standard T E N V 48YZ frame 1 h p single or three phase Pump Fixed displacement gear pump 2 gpm primary relief valve factory set at 1400 psi Solenoid coils 24 VAC 8 series 1 2 dia Wiring Quick disconnect Euro connectors NEMA IP 67 Reservoir Capacity 1 3 U S gallons 4 7 liters level measured by dipstick NOTE Oil level should measure 4 1 2 1 4 from the top of the fill hole with the leveler in maintenance position and the lip extended Hydraulic Fluid Acceptable Hydraulic oils Shell Tellus T 15 Mobil Aero HFA 49011 Exxon Univis Grade J13 Texaco Aircraft Oil 1554 U S Oil Co Inc ZFI 5606 Low Temp HYDRAULIC SYSTEM OPERATION Leveler And Bumpers The following describes the operation of the hydraulic system when the controls are activated Fig 17
44. ivalent protection of wheel chocks engaged The dock leveler should never be used outside its vertical working range or outside the manufacturer s labeled rated capacity It must also be compatible with the loading equipment and other conditions relating to the dock 4 6003935D 60 80K Hydraulic Dock Leveler 2013 4Front Engineered Solutions Inc April 2013 RAMP AND LIP GRADES Fig 1 Ramp grade Lip grade Ramp and lip grades Vehicle bed 96 for each dock leveler length position from dock 8 Leveler 10 Leveler 12 Leveler in Ramp Lip Lip Ramp Lip 6 16 15 4 8 4 12 6 5 6 14 13 6 6 5 11 1 4 1 12 15 0 7 9 11 8 4 7 9 3 2 3 10 12 7 5 6 10 0 2 9 7 8 0 8 8 10 4 3 3 8 1 1 1 6 4 0 6 2 6 8 0 1 0 64 0 6 51 1 9 4 5 9 1 1 48 2 2 3 7 3 3 2 3 9 3 1 3 1 3 8 24 46 0 1 9 5 0 16 54 1 0 6 0 5 2 0 1 7 1 00 7 0 0 4 7 3 4 2 1 9 1 1 7 8 7 1 6 8 6 6 4 1 11 1 3 3 10 3 3 0 10 0 gt 8 6 1 13 1 4 9 11 9 4 3 11 4 9 10 8 1 15 2 6 5 13 5 5 7 12 7 a 12 10 1 17 3 8 1 152 7 0 14 1 14 9 8 16 9 8 4 15 5 16 9 8 16 9 Ramp and lip grade low lip bend April 2013 6003935D 60 80K Hydraulic Dock Leveler 5 2013 4Front Engineered Solutions Inc INSTALLATION 8 id PIT LAYOUT Pit dimensions and curb angle lengths 3 4 conduit for electrical hig
45. lic hose s leaking TROUBLESHOOTING GUIDE Before doing any electrical adjustments or repair to control panel s make certain the power is disconnected and properly tagged or locked out If this is not possible in order to make the adjustment or repair USE EXTREME CAUTION Do not put fingers or uninsulated tools inside the control panel Failure to do so will result in death or serious injury Be certain before climbing into the dock leveler pit or doing any maintenance or repair under the dock leveler that 1 Both maintenance struts are raised and securely supporting the ramp in case of emergency 2 The power is disconnected and properly tagged or locked out Failure to do so could result in death or serious injury SOLUTION a Check that voltage is present at terminal connections to the control panel b Check that wiring matches the wiring diagram a Check overload relay setting and current draw b Check voltage when motor is started Voltage drop is more often a problem on single phase motors See conductor specifications in installation instructions a See previous solution b Check for voltage at all three motor connections T1 T2 T3 in control panel a Repair or replace hose s b Repair or replace pressure switch PS1 or wiring 6003935D 60 80K Hydraulic Dock Leveler 21 2013 4Front Engineered Solutions Inc TROUBLESHOOTING GUIDE continued PROBLEM POSSIBLE CAUSE 4
46. ly as practicable to a dock leveling device there shall be at least 4 100 mm of overlap between the front edge of the lip and the edge of the floor or sill of the transport vehicle The owner shall see that all nameplates and caution and instruction markings or labels are in place and legible and that the appropriate operating and maintenance manuals are provided to users Nameplates cautions instructions and posted warnings shall not be obscured from the view of operating or maintenance personnel for whom such warnings are intended Manufacturer s recommended periodic maintenance and inspection procedures in effect at date of shipment shall be followed and written records of the performance of these procedures should be kept Dock leveling devices that are structurally damaged or have experienced a sudden loss of support while under load such as might occur when a transport vehicle is pulled out from under the dock leveling device shall be removed from service inspected by the manufacturer s authorized representative and repaired as needed before being placed back in service Modifications or alterations of dock leveling devices shall be made only with written permission of the original manufacturer When industrial vehicles are driven on and off transport vehicles during the loading and unloading operation the brakes on the transport vehicle shall be applied and wheel chocks or positive restraints that provide the equ
47. nd properly tagged or locked off Failure to do so could result in death or serious injury WEEKLY QUARTERLY continued 1 Clean the upper portion of the lip plate hinge with awire 3 Inspect and lubricate all mechanical pivot points on the brush and blow away all dirt and debris This will ensure leveler and bumpers with S A E 30 oil Cycle the leveler proper lip plate operation after lubricating See Fig 24 2 Checkthefull range ofoperation ofthelevelerand bumpers 4 Inspectthe hydraulic cylinders and hoses for any fluid loss to ensure there is no hesitation in the hydraulic system and check the reservoir level with the leveler is resting Any loss of fluid will effect the velocity fuse operation on both maintenance struts The reservoir should be 1 3 full add oil as required 3 Inspect the operation of the telescopic toe guards to ensure they are not distorted or binding when the leveler 5 Inspect all welds under the leveler for fatigue or failure is operating particularly the lip plate hinge and under the ramp of the leveler 4 Clean away any debris from the rear hinge area of the leveler and between the sides and curb angles to ensure 6 Inspect all warning labels and placards Replace as smooth operation necessary QUARTERLY 1 Clean out inside of the pit area If washing out take care notto spray any electrical parts or hydraulic components 2 Lubricate the lip hinge tubes with a NLGI 2 Molybdenum Disulfide Greas
48. njury 2 6003935D 60 80K Hydraulic Dock Leveler 2013 4Front Engineered Solutions Inc Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury NOTICE Notice is used to address practices not related to personal injury April 2013 Read these Safety Practices before installing operating or servicing the dock leveler Failure to follow the safety practices could result in death or serious injury If you do not understand the instructions ask your supervisor to explain them to you or contact your local authorized distributor OPERATION Use restricted to trained operators Follow procedures on placard posted near dock leveler Do not use this unit to service vehicles outside its intended working range which is 12 inches above and 16 inches below dock Do not operate the dock leveler with equipment material or people on the ramp or lip Do not operate the dock leveler when anyone is in front of it unless they are securing the maintenance struts Stay clear of the dock leveler when it is moving Keep hands clear of hinges at all times Do not use hands to position dock leveler ramp or lip in vehicle or to store dock leveler Stay clear of leveler unless lip supported by the vehicle bed or the ramp is supported by either both lip keepers at dock level or by both ramp stops at full below dock position unsupported leveler can lower unexpectedly Do not u
49. per ext PS2 Pressure Switch Controls when bumpers will extend by Pressure switch will be set at 100 PSI at factory checking for low pressure in system Solenoid Valve SV1 Keeps bumpers from extending while deck No adjustment is required and or lip are in motion Solenoid Valve SV2 Directs the flow between the main cylinders No adjustment is required and bumpers extending PS1 Pressure Switch Tells the motor to shut off once the bumpers Pressure switch will be set at 1000 PSI at are extended factory Solenoid Valve SV3 Allows bumpers to extend once deck and lip No adjustment is required have stopped moving Relief Valve RV3 Controls maximum pressure in the system No adjustment is required Relief valve set at when bumpers come in contact with 3000 PSI at factory vehicle April 2013 6003935D 60 80K Hydraulic Dock Leveler 25 2013 4Front Engineered Solutions Inc HYDRAULIC POWER UNIT ADJUSTMENT LA WARNING Before servicing the dock leveler read and follow the Disconnect power and properly tag or lock out to prevent Safety Practices on page 3 Failure to do so could result accidental operation while making adjustments in death or serious injury Do not work under the dock leveler ramp or lip unless both maintenance struts are securely supporting the leveler and the lip maintenance bar is supporting the lip Fig 26 Dipstick breather cap Reservoir tank C2 port to manifold 8
50. se the dock leveler if it appears damaged or does not operate properly Inform your supervisor immediately Do not stand in the driveway between the dock leveler and a backing vehicle Before chocking wheels or engaging vehicle restraint dump air from air ride suspensions and set parking brakes Chock vehicle wheels or lock vehicle in place with a vehicle restraining device and set brakes before loading or unloading Ensure lip avoids contact with vehicle sides and cargo If lip does not lower to vehicle bed reposition vehicle SAFETY PRACTICES OPERATION continued Do not use a fork truck or other material handling equipment to lower the ramp Move all equipment material or people off dock leveler and store dock leveler at dock level before allowing the vehicle to pull out Store dock leveler at dock level after use Keep away from the dock leveler lip and bumpers when the raise button is pressed or released The lip and dock leveler are free to move and the bumpers move automatically when pressure is applied and or released INSTALLATION MAINTENANCE AND SERVICE If the dock leveler does not operate properly using the procedures in this manual call your local distributor for service Place barricades on the dock floor around the dock leveler pit and in the driveway in front of the pit while installing maintaining or repairing the dock leveler Do not operate the dock leveler when anyone is in front of it unless the
51. st be from fused disconnect supplied by others Fuse size for a dual element time delay motor rated fuse can be no greater than 225 of motor FLA Before doing any electrical work make certain the power is disconnected and properly tagged or locked out All electrical work must be done by a qualified technician and must 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 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 1 Mountand wire control panel See wiring diagram located inside the control panel Follow the wiring instructions on the wiring diagram Run home run cables A and B from Fig 3 Pe S Push button control panel p Fig 4 Junction box located leveler frame in pit See pages 14 and 27 J box A input to sensors Home run J box B cable A output to control to solenoids panel Motor power Home run cable B the control panel to the pit mounted junction boxes Run J box cables and wires through conduits indicated in Fig 2 coaliel pane 8 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc Inadequate lifting equipment or practices can cause a load to fall unexpectedly Make sure the lifting
52. t by 4FRONT or 2 the date of installation of the DOCK LEVELER by the original purchaser provided that the owner maintains and operates the DOCK LEVELER in accordance with this User s Manual Hydraulic Limited Warranty The hydraulic power unit and cylinders for this dock leveler are warranted to cover the cost of replacement costs only for an extended period of four 4 years beyond the base warranty period In the event that this DOCK LEVELER proves deficient in material or workmanship within the applicable Limited Warranty period owner shall so notify 4FRONT and 4 Front will at its option 1 Replace the DOCK LEVELER or the deficient portion s thereof without charge to the owner or 2 Alter or repair the DOCK LEVELER 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 DOCK LEVELER 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 DOCK LEVELER including premature product wear product failure property damage or bodily
53. tions Inc PARTS LIST HYDRAULIC CYLINDERS AND HOSES continued 48 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc PARTS LIST HYDRAULIC J BOX Fig 44 LS1 ARTD PS2 HOME RUN CABLES w FLYING LEADS INPUT OUTPUT Item Quantity Description Part Number 595 1 EMI Em HOME RUN CABLE 8 WIRE 90 QD EURO 10M GRAY A INPUT 6008055 QD EURO LTEM DI PROXIMITY SWITCH QD EURO 3 WIRE PNP ARTD 6008404 PE SENSOR 18MM DIA FIXED FIELD 50MM DC EURO QD LIP SENSOR 6014173 CBLE ASSY 2 DIN PLUG PARALLEL QD EURO MALE 1 2 MLG 6014175 8 32UNC X 1 LG PAN HD SCREW PHILLIPS ZP 6000582 April 2013 6003935D 60 80K Hydraulic Dock Leveler 49 2013 4Front Engineered Solutions Inc PARTS LIST MANIFOLD ASSEMBLY Fig 45 Q
54. uantity Description Part Number 1 MANIFOLD BLOCK VERSA IIl HYDRAULICS 6009710 CHECK VALVE DIRECT ACTING GUIDED BALL PB CVC FTG STRAIGHT 6 JIC X 6 SAE ORB FTG STR THD ELBOW 90 6 JIC M X 6 SAE ORB M STL 313214 VALVE 3W 2P DIRECTION CONTROL SPOOL VALVE SV2 SOLENOID COIL 24VAC 1 2 TYPE P DIN 43650 SOLENOID VALVE NC PILOT OPERATED POPPET PB S2A SV1 amp SV3 50 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc a N gt E Em NN CM Ey e E PARTS LIST HYDRAULIC POWER UNIT Item Quantity Description Part Number 1 1 HYDRAULIC POWER ASSY 110 240V 1PH 50 60HZ 6012593 HYDRAULIC POWER ASSY 208 480V 3PH 50 60HZ 6012594 HYDRAULIC POWER ASSY 575V 3PH 50 60HZ 6012595 DIPSTICK BREATHER CAP 5 LG BHGR POWER UNITS 6013798 RESERVOIR 1 3 GAL DUAL PORT STEEL 6014176 FTG STR THD ELBOW 90 6 JIC M X 6 SAE ORB M STL 313214 SOL VALVE 2W2P 8 NC SPOOL PB S2G SV5 313569 EZ ee SOLENOID COIL 24VAC 1 2 TYPE P DIN 43650 313564 RETAINING NUT 1 2 SOLENOID 6011725 1 VOLTAGE LABEL EXT ON PUMP 120 VOLT 921051 VOLTAGE LABEL EXT ON PUMP 240 VOLT 921052 VOLTAGE LABEL EXT ON PUMP 480 VOLT 921053 VOLTAGE LABEL EXT ON PUMP 575 VOLT 921054 1 PHASE LABEL EXT ON PUMP SINGLE PHASE 921026 PHASE LABEL EXT ON PUMP THREE PHASE 921027 CABLE GRIP 1 2 HUB 5 8 CABLE 533424 POWER CABLE
55. unterclockwise to increase speed Adjust needle valve so that ramp lowering speed equals ramp raise speed 22 6003935D 60 80K Hydraulic Dock Leveler April 2013 2013 4Front Engineered Solutions Inc PROBLEM 8 Lip plate will not extend or extends too slowly 9 Lip plate extends too soon 10 Lip plate will not stay out falls as leveler is lowering 11 Auto Return To Dock not operating properly 12 LIP EXTEND button is not working STOP button not working April 2013 TROUBLESHOOTING GUIDE continued POSSIBLE CAUSE SOLUTION a Low fluid level in reservoir a Check fluid level with leveler raised Add fluid if required and check for leaks See pg 15 for correct fluid level b Sequence valve set too high b If lip extends as dock raises increase sequence valve setting by turning clockwise c Lip hinge bar binding C Inspect lip area for damage or trapped debris d Primary relief valve set too low d Set primary relief valve to 1400 PSI 8 Sequence valve set too low 8 Turn clockwise to increase pressure so that the lip plate does not extend until the deck is fully raised a Pilot operated check valve valve a Remove and inspect for foreign matter not closing Clean as required b Lip cylinder damaged b Replace lip cylinder 8 Proximity switch faulty or faulty a Check for 24 VDC at ARTD terminals electrical connection in control panel b Proximity switch or lip target ar
56. ustomer gets the user s manual and is properly trained Using the electrical power use the procedure shown on page 13 to lower both maintenance struts Operate the dock leveler four more times through the complete cycle to check operation Fig 11 Remove shipping cotter pins Warning and operating instruction placard A 12 6003935D 60 80K Hydraulic Dock Leveler 2013 4Front Engineered Solutions Inc April 2013 ADANGER Before servicing the dock leveler read and follow the Safety Practices on page 3 and the Operation section of this manual DO NOT WORK UNDER THE DOCK LEVELER RAMP OR LIP UNLESS BOTH MAINTENANCE STRUTS ARE SECURELY SUPPORTING THE LEVELER AND THE LIP MAINTENANCE BAR IS SUPPORTING THE LIP MAINTENANCE STRUTS AND LIP MAINTENANCE BAR 1 To raise both maintenance struts the lip maintenance bar two people are needed a Push and hold the RAISE button on the control panel so leveler is fully raised and lip is extended The second person raises the maintenance struts into the locked vertical position while positioning the maintenance struts into the brackets located on the underside of the ramp assembly See Fig 13 Pull out hitch pin and clevis pin from top hole of lip maintenance bar bracket and raise lip maintenance bar See Fig 14 Reinsert clevis pin through brackets and lip maintenance bar bracket Then reinsert the hitch pin into the clevis p
57. ways be certain that the vehicle is properly restrained before loading or unloading VISUALLY INSPECT vehicle restraint to make sure vehicle does not pull away unexpectedly Failure to do so could result in death or serious injury Never drive on dock leveler with STOP button pressed RAISING LEVELER 1 Press the RAISE button on control panel to retract bumpers and raise leveler 2 When the leveler is fully raised the lip will automatically extend To extend the lip earlier press the LIP EXTEND button 3 When leveler is supported by vehicle floor bumpers will extend NOTICE If amber pilot light is flashing the bumpers have failed to extend properly Reset by pressing RAISE or cycling STOP button 4 When lip is fully extended release the button The leveler will slowly float down to the vehicle bed and the bumpers will extend when the lip is supported by the vehicle Press the STOP button to stop leveler in any position Never drive on the leveler with STOP button pressed Leveler must be free to float with vehicle when driven on NOTICE If an obstruction prevents the lip from extending properly press the RAISE button to raise and retract the lip Perform below dock end loading as described on page 18 16 2013 4Front Engineered Solutions Inc 6003935D 60 80K Hydraulic Dock Leveler Always secure the vehicle with a vehicle restraint or wheel chocks before operating the dock leveler Do not operate
58. y are securing the maintenance struts Do not work under the dock leveler ramp or lip unless both maintenance struts are securely supporting the leveler and the lip maintenance bar is supporting the lip Disconnect the power supply and properly tag or lock out before climbing into the dock leveler pit or doing any maintenance or repair under the dock leveler All electrical troubleshooting or repair must be done by a qualified technician and must meet applicable codes Disconnect the power supply and properly tag or lock out before doing any electrical work If it is necessary to make troubleshooting checks inside the control box with the 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 death or serious injury Keep away from the dock leveler lip and bumpers when the raise button is pressed or released The lip and dock leveler are free to move and the bumpers move automatically when pressure is applied and or released April 2013 6003935D 60 80K Hydraulic Dock Leveler 3 2013 4Front Engineered Solutions Inc SAFETY PRACTICES continued The owner should recognize the inherent danger of the interface between dock and transport vehicle The owner should therefore train and instruct operators in the safe use of dock leveling devices When a transport vehicle is positioned as close

User`s Manual - Curlin, Inc.

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