E-47/E-57
Contents
1. JO NHf1L38 5 24 4 4 YANIVELS GION310S H3OQNHAO V 131 JA WA 09 0991 H9r 3 9 97 3 3 vz L JHNH 1V013 83M01 HOLOIN HOLIMS Jalona1os _ O JLAM asna MOVIE 8 3SIVH HOLIMS 1 014 1 H9t 73 9 97 3 S TSCOW 1 20 Ndf1 90 1 PS WT 431 15 m HZIOH2N3 DW NW 105 V 09 0991 9 9 97 9 3 lt q 3A1ISOd 5 1910 3ZISH3N3 lt gt eS asivu TlIOHLNOO dH3A31 21 5 MILLS ANS E e 21 21 3NVd Jsfna yams uoniub V L HOLIMS 440 NO 7 3HIM 222 ANNOYS HOLIMS 972297 OL H3MOd YOUMS uou SSANYVH GVd HONOL AO 3HIM 3LIHM qION3TOS HOLOMW OL GION3IOS 8 OL 3719 3HIM N3349 HOLIMS OL H3MOd GION3IOS OL 3HIM MOV 182. 27 ANGLE RIGHT Troubleshooting aei dulerd enr 28 WILL NOT HOLD ANGLE Troubleshooting 29 CROSSOVER RELIEF VALVE Flow 29 23 DIAGNOSTIC FLOW CHART FOR E 46 E 47 and E 57 ELECTRO LIFT UNITS These charts are intended to be used as an aid in diagnosing problems on the Electro Lift units They are not a substitute for factory training and experience Be certain to read the General Information and Testing Tips sections before attempting any troubleshooting IMPORTANT Maintenance and repairs must be performed with the moldboard on the ground General Information Before any troubleshooting is started make certain the following conditions are met 1 moldboard is pointing straight ahead This can often be done by coupling the left cylinder into the right cylinder and pushing the moldboard by hand 2 The power angling cylinders must be installed correctly on to the A frame The left cylinder Driver s side has a hose attached with a male half of a coupler at the end the right cylinder Passenger side has a hose attached with a female half of a coupler at the end 3 solenoid coils must be on their proper valve The coil green wire must be next to angling fittings The red wire is located to the front of the Electro Lift Unit The coil black wire is
3. 106 OL HONOL OH123 13 10 JSIVd 9 9 8 7 3 513001 LYVHO 96 1 JO 009 0082 55 SYACNITAO OES CION3 IOS GIONS IOS 87 ue GIONS IOS OK 3ATVA MO3HO AYN WAQ ddl il iV i 14 i 0 0002 BENED 09 0991 Lv Jal 13d JjdriSsSdud vr DIOU OS 75 y My 2 ob 9 di 296 1 3 19NIS MILLS ANS 06 V 9JIM 3ALLVO3N 3ALISOd cV HOLIMS 330 lt gt ana J aNNOY9 HOLIMS LE HOLIMS 1 H3MOd KW YOUMS uoniub IVO1sd dSM01 SSANYVH HONOL dO 3HIM SLIHM 0 SHIM 105 HOLON OL e GION3T1OS OL SHIM 1 SHIM N3349 HOLIMS OL Q GION3IOS OL 3HIM OL HONOL 1 3139 12 1 8 1
4. Applied Voltage 12 Volts DC Max Current Draw 230 Amperes SOLENOID VALVES AND Coil Applied Voltage 12 Volts DC Current Draw 1 2 Amperes Nominal resistance ohm meter lead connected to coil lead other meter lead connected to metal coil cover 9 6 ohms 10 Plastic cover Coil 10 0 ohms 10 Coils 12 1 24 Applied Voltage Current Draw Nominal resistance ohm meter lead connected to coil lead other meter lead connected to metal coil cover 3 73 ohms 3 SOLENOID SWITCH Applied Voltage 12 Volts DC Max Current Draw 5 Amperes Nominal resistance ohm meter lead connected to coil lead other meter lead connected to metal foot 2 65 to 4 5 ohms HYDRAULIC SPECIFICATIONS PUMP Pressure Output 46 47 Relief Valve setting 1650 50 PS E 57 Non Adjustable 2000 CROSSOVER RELIEF VALVE Opening Pressure 3800 400 PS I HYDRAULIC FLUID CAPACITY NOTE 1 Quart 32 Fluid Ounces Model E 46 27 OZ Model E 46H 1 qt 02 35 5 02 Model E 47 amp E 57 Unit 28 OZ Hoses amp 1 1 2 x 10 Cylinders 16 02 Total 1 qt 12 oz 44 oz Model E 47 amp E 57 Unit 28 OZ Hoses amp 1 1 2 x 12 Cylinders 19 02 Total 1 qt 15 oz 47 OZ Model 47 8 E 57H Unit 1 qt 4 5 oz 36 5 oz Hoses amp 2x 12 Cylinders 28 OZ Total 2 qt 5 oz 64 5 OZ Model E 57H Unit 1 qt 4 5 oz
5. FIGURE 3 53 FIGURE 3 54 Assemble Poppet with bushing into Cage as shown To install Bushing 51 assemble Washer 53 onto the Poppet as shown Press Washer down on Cage this will put equal pressure on the Bushing Hold Washer 53 in place then remove Poppet from Cage FIGURE 3 55 FIGURE 3 56 Slide O ring 49 over bottom of Cage DO NOT push Seat Cage assembly 50 to the bottom of the block cavity O ring completely onto shoulder of Cage Drop Cage using a Drift Pin of approximately the same diameter Tap assembly into block cavity Drift Pin lightly with a hammer until Cage assembly bottoms 47 out and seals against O rings 48 49 CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3 57 FIGURE 3 58 Reassemble Poppet 52 into Cage Reassemble Washer 53 smooth side up FIGURE 3 59 FIGURE 3 60 Assemble Spacer 56 Reassemble Spring guide 54 smooth side down 48 CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3 61 FIGURE 3 62 Reassemble Spring 55 Reassemble Plug 58 with Adjusting Screw 59 and disc 57 To properly adjust the Crossover Relief Valve refer to page 21 Push leading edge of the Moldboard against an immovable object until Crossover Relief Valve opens 3800 5 400 Reassemble Acorn Nut 61 and O ring 60 FIGURE 3 63 49 BRUSH REPLACEMENT OF AMERICAN BOSCH MOTOR FIGURE 3 64 FIGURE 3 65 A special tool figure 3 69 is required to hold brushes in Once top cap is positio
6. 1 SORRY W YI V 00 AR r JA VA 3ZISH3N3 qaziouaNa 194 2 ww 49N J BEN 1 3 GION3 OS GION3 1OS ue 319NV 1 HOLIMS 1331 319NV 218 ELECTRO LIFT UNIT COMPONENTS RESERVOIR ELECTRO LIFT UNIT COMPONENTS MOTORS 3 46 E 46H and 47 E 47H The 12 volt DC high torque motor used on the Electro Lift units are interchangeable among all four models lts function in all four applications is to drive the hydraulic pump The motor is only energized and operating when pressurized hydraulic fluid is required Two different brand motors were used While they are interchangeable and have nearly identical performance characteristics they have distinctive design differences American Bosch The American Bosch motor is a four pole permanent magnet motor which consists primarily of a 3 diameter solid steel frame armature brushes and ceramic permanent magnet fields Because the fields are permanent magnets they do not require electrical current to operate Therefore the motor requires lower amperage to produce a given amount of power Electro Lift units equipped with an American Bosch motor cannot be used on vehicles with a positive ground electrical system since the motor will rotate backwards Positive ground vehicles will require modification of th
7. 9 9 9 0 3 513001 LYVHO YANIVELS SE DU 1 m Nivad 20 AVINI 25 MA 2 l Sd 00 0086 48138 GION310S 5 5 M 191 H3MOd JA IVA gt 0 0002 183 09 069 IL 27 9 CIION3 lOS CIION3 IOS dl ldd uu JjafiSsdad 153 VS L DEE q 3ALISOd 3ALIVO3N o piou oS 4 032199 9 lt lt 3514 yms uoniub dJ TIOHLNOO 1 3 T9ONIS MILLS ANS 5 vS YAMOd HOLIMS 440 NO d lt ANNOYS HOLIMS LF HOLIMS OL H3MOd QN YOUMS uoniub HONOL dO GNA GION3T1OS YOLOW OL GION3 IOS OL 3HIM N33H9 HOLIMS OL H3MOd GION31OS 2 OL 1 GION310OS OL HONOL OH123 13 14 26 41 10 34 519000 JO l Sd 007 00
8. Coil Black Wire 24V A Cartridge Valve Seal Kit A Valve Valve Assy w Coup 12V Valve Assy w Coup 24V Forged 90 Degree Elbow Coupler Female Half Coupler Male Half Kit Pilot Check Valve Ball Steel Spring Plug Piston Plug Valve Block e O ring 9 16 I D B Solenoid Assembly B Coil Red Wire B Coil Red Wire 24V B Cartridge Valve Seal Kit B Cartridge e Kit B Check Valve Ball 7 16 Spring Solenoid Assembly Coil Green Wire Coil Green Wire 24V e C Cartridge Valve e Seal Kit C Cartridge Kit Crossover Valve Seal Kit Crossover Valve includes items A B D M Soc Head 5 16 18 x 1 1 2 Parts indented are included in assembly under which they are indented Parts included in Master Seal Kit Part No 15888 Basic Seal Kit Part No 15254 Pump Relief Valve 2000 full flow Non Adjustable Set Crossover Relief Valve 3800 400 2 1 2 33 DISASSEMBLY ALL MODELS FIGURE 3 2 FIGURE 3 3 To drain oil from the unit remove the drain plug using a Drain Plug removed 11 16 wrench 1 46 46 amp E 47 47 FIGURE 3 4 FIGURE 3 5 To replace the motor remove the two cap screws use a Hold the motor parts together while removing it from the 10mm
9. Ring 1 1 8 I D Cover amp Seal Assy Wiper O Ring 3 1 2 Sleeve Pressure Relief Valve Kit Reducer Bushing 1 4 x 1 8 Pressure Relief Valve Cylinder Washer Grooves Down Ram Assembly Piston Piston Follower Spacer Packing Cup O Ring 7 16 Locknut 1 2 13 Base amp Strainer Assy Strainer Filter Kit 9 16 Filter Plug w O Ring 9 16 Stud Baffle Retainer Ring Pump Check Valve Kit O Ring 3 8 Seat Ball 9 32 Spring STANDARD UP THROUGH C 9 1 1 8 x 6 Stroke E 57 15122 21999 15127 21929 20697 15972 15905 15660 15431 15661 15659 15662 15660 15431 15758 15779 22295 22294 22293 15639 LONG STROKE HM 9 amp HM 10 ONLY 1 1 8 x 8 Stroke E 57H 15122 21999 15127 21929 20697 15972 15905 15660 15431 15661 15659 15662 15660 15431 15758 15779 22295 22294 22293 15639 lt l l l l l l l l l l l l l 0 4 c c 4 WO 9 DESCRIPTION O Ring 1 4 1 0 Drain Plug w O Ring 9 16 O Ring 5 8 Washer Nyltite 5 16 Locknut 5 16 24 A Solenoid Assembly A Coil Black Wire 12V A Cartridge Valve eee Seal Kit A Valve A Solenoid Assembly A Coil Black Wire Plastic A
10. ball for B Cartridge being removed 37 DISASSEMBLY 47 8 E 57 MODELS FIGURE 3 18 FIGURE 3 19 Cartridge check spring removed Use a 13 16 Hex Socket to remove pilot valve plug FIGURE 3 20 FIGURE 3 21 Pilot check piston being removed Handle piston with The valve body can be removed from unit using care If piston is scratched or damaged it must be a 1 4 hex key or Allen Socket replaced 38 DISASSEMBLY 47 8 E 57 MODELS FIGURE 3 22 FIGURE 3 23 Use a 1 4 hex key or Allen Socket to remove pilot valve Pilot check spring being removed from valve body plug FIGURE 3 24 FIGURE 3 25 Pilot check ball removed This is a 3 8 diameter steel There are two filters on E 47 and E 47H and one on ball E 46 E 46H units Remove filters with an 11 16 wrench 39 DISASSEMBLY ALL MODELS FIGURE 3 26 FIGURE 3 27 Filters removed soak in kerosene before reassembling Before removing ram and piston assembly extend rod fully This drains out remaining oil in cylinder FIGURE 3 28 FIGURE 3 29 When disassembling the reservoir cylinder assembly Cover is removed from reservoir using a large screw use a 1 2 hex socket to remove the lock nuts The studs driver and hammer or mallet as shown tapping lightly usually unscrew from the base with the nuts around the top cap 40 FIGURE 3 30 FIGURE 3 31 Remove and cylinder assembly from reservoir then Remove nuts baffl
11. hex socket on the E 57 and a 3 8 hex socket on pump the E 46 and E 47 34 DISASSEMBLY ALL MODELS FIGURE 3 6 FIGURE 3 7 To remove the pump E 57 use a 1 4 Allen socket on Pump removed from the unit base the three bolts E 46 and E 47 use a 1 2 hex socket on the three locknuts The studs usually unscrew with the nuts nh I F _ FIGURE 3 8 FIGURE 3 9 Remove the Coil using a 3 8 or 1 2 wrench Coil removed from the Cartridge 35 DISASSEMBLY ALL MODELS FIGURE 3 10 FIGURE 3 11 The Cartridge is removed using a 7 8 or 1 1 8 hex The Cartridge is removed Clean screen by soaking deep socket cartridge in cleaning solvent E 46 amp E 46H ONLY FIGURE 3 12 FIGURE 3 13 End plate is removed by using a 1 4 hex key on the four Remove B and C Coil by using a 7 16 Wrench on socket head screws Note orientation of plate to the unit the retaining nuts this is critical when assembling 36 DISASSEMBLY 47 and E 57 MODELS FIGURE 3 14 FIGURE 3 15 Coils removed from cartridges A special hex socket part number 21891 may be required to remove B and C Cartridges See Figure 3 67 FIGURE 3 16 FIGURE 3 17 amp Cartridge being removed from valve block A magnetic probe is extremely useful for removal of Clean cartridges by soaking in kerosene small valve parts This is the 7 16 check
12. of 2500 in the circuit Note The E 57 Model has a nonadjustable pressure relief valve and is factory set to 2000 5 SOLENOID VALVES Hydraulic valves are simple in concept and all have the same basic function Control the direction of oil flow One type of Solenoid Valve is used on the models 46 and E 46H and three types are used on models that Power Angle Each Solenoid Valve consists of two components the Cartridge and the Coil Cartridge The Cartridge consists of the hydraulic valve mechanism and an armature which enables the valve mechanism to be operated and controlled electrically The Cartridge is designed to screw in and out of the Electro Lift units much like the typical spark plug Coil The Coil is the electrical component which operates the Cartridge s valve mechanism by producing magnetism which pulls the Cartridge s armature toward it Since the armature is connected to the 5 only moving part it is pulled by the armature Figure 1 9 illustrates the typical Coil Whenever electrical current flows to the Coil it flows through the winding which consists of numerous turns of copper wire The flow of current through the winding produces a magnetic field which pulls the soft iron armature further into the Coil The armature pulls the valve spool or poppet valve into its alternate energized position Not illustrated is an integral coil spring which is com
13. these damaging forces under normal snow plowing conditions The crossover relief valve cannot protect the system from damaging forces that are too great due to abusive snow plowing conditions Basically the crossover relief valve functions exactly like the previously described pump relief valve It s designed to open at a specific pressure 21 In this instance the pressure is not produced by the pump but rather by the damaging force As an example assume that the right corner of the plow runs into the end of a curb The impact will attempt to collapse the right power angling cylinder As a result very high hydraulic pressure is produced within the cylinder When the produced pressure is high enough it opens the crossover relief valve allowing the highly pressurized hydraulic fluid to flow directly to the left power angling cylinder When the crossover relief valve functions in this manner the excessive pressure is released the excessive energy produced by the impact is absorbed and the result is only a change in angled position of the plow The crossover relief valve may be adjusted to the specified pressure of 3800 400 by turning 3 8 hex cap screw after installing a suitable pressure gauge of 4000 the circuit TIGHTEN TURN IN ADJUSTMENT SCREW TO INCREASE PRESSURE See Figure 3 63 Disassembly Reassembly figures 3 42 thru 3 62 SWITCH Models E 46 and E 46H A single three position tog
14. 36 5 oz Hoses amp 1 1 2 x 10 Cylinders 16 oz Total 1 qt 20 5 oz 52 5 oz TORQUE SPECIFICATIONS Thread Torque Size In Lbs Reservoir Cover Retaining Nuts 5 16 24 100 125 Pump Assembly Retaining Nuts Cap Screws 5 16 24 100 125 End Plate or Valve Block Retaining Cap Screws 5 16 18 96 120 Motor to Pump Retaining Cap Screws 1 4 20 45 55 Drain and Filter Plugs 1 2 20 75 85 amp ICE CONTROL EQUIPMENT ELECTRO LIFT power units service manual MODELS E 46 E 46H E 47 E 47H E 57 E 57H 1 11 1 1 1 1 1 Diamond quipment veland OH 44112 1084 6 Angell Lane Damariscotta ME 04543 9720 Phone 216 486 1313 Phone 207 563 2 eye 3 2227 email warranty meyerproducts com www diamondplow com email info diamondplow com 2004 Printed in the U S A PRODUCTS INC Meyer Prod 18513 Euclid Ave Cle e 21
15. 8 188 5 SYAGNITAO H3MOd dIONJ IOS 99 1 4 ee d WV ARA 43114 CIION3 IOS V i YACNI TAO 131 SS Vy SEK 5 a 25 ZX 4 JA IVA MOSHO 19922220 LON TSd 0S 0591 QION31OS dal laa 3unssdud 15 V9 L JALISOd lol 5 rej VN s 1 3 TY prouejos fa T G3ZIDYANA SHIM 3LIHM Gav 3514 uoniub dJ TIOHLNOO 1 3 T9ONIS MILLS ANS 9 YAMOd HOLIMS 330 NO P i d lt ANNOYS HOLIMS QS HOLIMS OL H3MOd QN YOUMS uoniub J I9NV 1441 HONOL dO GNA GION3T1OS YOLOW OL GION3 IOS OL N33H5 HOLIMS OL H3MOd GION31OS OL MOV 18 GION310OS OL HONOL OH123 13 16 1431 STONV 99 1 18 34 3 Zv 4 57300 Ori vadAH WAWA WW 43115 NIVHG 40 Nunisu 2 8 00r 0088 22 H3AOSSOHO Q dIONJ TOS iV ii YACNI TAO 191 SNI I9NV
16. Angle Switch Is there power leaving the switch Replace Harness Are the wires in molded connector making contact with the switch Replace Angle Switch SNOW PLOW WILL NOT HOLD ANGLE Are the Rams mushy ossthemoldbeard Are the C Valve Is Crossover Relief e Set Crossover Relief to Can you push the moldboard hold left angle amp release O Rings in poor at 3800 400 PST SEDE DE 6 to 8 by hand from right angle condition Are Crossover O Rings Replace Crossover O Rings good condition or complete Crossover YES Bleed air from the system and snug up gland nuts Replace O Rings Replace the Check couplers and fittings Block for leaks un Change Pilot Check Inspect Crossover Relief an and Seat Rebuild or Replace Replace the does snowplow Does snow plow now P A Block snow plow now angle now hold hold angle Crossover Relief Valve R cr SOLENOID SOLENOID Pressure 47 POWER ANGLING CYLINDERS CROSSOVER RELIEF 3800 400 P S I 20 SECTION 3 REPAIR PROCEDURES CONTENTS GENERAL 2401 24 due UNIT DISASSEMBLY AND REASSEMBLY U 8 Shaft Seal Replacement ELECTRO weleoomu Pans BreakdOw D
17. DIAGNOSIS EUN 23 3 REPAIR PROCEDURE 30 4 SPECIFICATIONS 53 Meyer Products Inc reserves the right under its continuing product improvement program to change construction or design details specifications and prices without notice or without incurring any obligation SECTION 0 GENERAL INFORMATION AND MAINTENANCE CONTENTS GENERAL INFORMATION 2 MODEL IDENTIFICATION eren mme 2 e MODEL IDENTIFICATION AND SERIAL NUMBER LOCATION 2 MOTOR IDENTIFICATION pas 2 MAINTENANCE C 2 GENERAL MAINTENANCE seen 2 E S 2 VEHICLE ELECTRICAL SYSTEM CHECK REGULARLY nnmis 3 POST SEASON MAINTENANCE 3 e MEYER HYDRAULIC FLUID 1 3 REPLACEMENT OF HYDRAULIC FLUID 3 un uuu ate 3 e PROTECTION AGAINST RUST AND CORROSION ccccecececceveccuceuaccucavaueusavauuusuvauaueuvausnenvas 3 GENERAL INFORMATION Model Identification The Electro Lift unit
18. FORM 1 562 16 October 2005 54 25 ELECTHO LIFT ELECTRO power units service manual MODELS E 46 E 46H E 47 E 47H E 57 E 57H Meyer Products Inc Diamond Equipment 18513 Euclid Ave Cleveland OH 44112 1084 6 Angell Lane Damariscotta ME 04543 9720 Phone 216 486 1313 email warranty meyerproducts com 2005 Printed in the U S A Phone 207 563 2227 Meyer www diamondplow com email info diamondplow com PRODUCTS INC FOREWARD This Service Manual includes complete information for servicing the following Electro Lift Units E 46 and E 46H E 47 and E 47H E 57 E 57H IMPORTANT Maintenance and repairs must be performed with the moldboard ground The information is grouped according to the type of work being performed such as diagnosis and testing disassembly and reassembly Special tools and specifications are also included in this manual All information illustrations and product descriptions contained in this manual are correct at publication time We do however reserve the right to make changes at any time without prior notice MEYER PRODUCTS INC SECTION INDEX Section Number SECON Tile uuu 0 GENERAL INFORMATION AND MAINTENANCE 1 1 GENERAL DESCRIPTION AND THEORY OF OPERATION 4 2
19. YES Replace P A Block with E 46 plate and retest Does snow plow Raise now NO Clean or Replace the Replace Valve Sump Base and retest Replace P A Block 25 Is the motor turning the proper direction Check for clogged strainer Is oil getting to the pump Replace the Raise Switch NO Check Brushes for proper installation or replace motor Clean strainer and flush the system completely Replace the Pump Does the motor armature turn tightly Repair or Replace the motor Are wires in molded connector making contact with the switch Replace the Raise switch SNOW PLOW LEAKS DOWN Does the NO Does the snow plow snow plow drop drop and angle straight down to the left Replace Replace Replace B Check Valve B Valve Does it now hold Does it now hold Are A Valve O rings in good condition Replace O Rings Does A Valve stem move freely Replace A Valve E 46 ONLY Dissasemble unit Replace Pump Check Valve Inspect O Rings Cylinder Replace Remember to coin the ball to the seat Piston Assembly Sump Base Does it now Hold Does it hold now E 47 Dissasemble unit Inspect O Rings Cylinder Replace Piston Assembly Sump Base Does it hold now SNOW PLOW WILL NOT LOWER Does A Coil Is there power to the Is there power leaving NO Are wires in molded Black Wire have A Coil Black Wire the sw
20. acts the end cap bearing Properly position the gasket and reinstall the commutator end cap as shown in Figures 3 64 and 3 65 Torque the cap screws and seal the cap screw heads as shown in Figure 3 40 Iskra Brush Replacement See Figure 3 66 51 VALVE CARTRIDGES IMPORTANT The valve cartridges be damaged beyond repair by bending or denting the tube the portion of the cartridge surrounded by the coil Therefore do not grip the cartridge tube with pliers or clamp it in a vise Cartridge NOTE Use only a 7 8 or a 1 1 8 hex deep socket to remove and reinstall the Cartridge The Cartridge cannot be disassembled When operating normally the poppet can be pushed in approximately 030 Jamming of the poppet due to metal chips or other contamination can usually be eliminated by immersing the entire cartridge in clean kerosene and pushing the poppet in and out with a probe until it moves freely Dry with compressed air and reinstall In the event jamming cannot be eliminated replace the cartridge B and C Cartridges NOTE Cartridges without a hex nut must use special tool No 21891 to remove and reinstall the B and C Cartridges See Figure 3 67 When jamming of the spool occurs attempt to eliminate it using the method described under Cartridge before disassembling it The B and C Cartridges can be d
21. aise or maximum angle with motor running 4 Proper rotation for the 3 motor American Bosch is indicated by an arrow located on top side of the Part 15026 pump 5 The pump shaft of a good pump can be turned smoothly using two fingers If it can t be turn easily the pump is too tight and must be replaced 6 Pump pressure can be measured at an angle hose note pressure at full angle or in the pressure filter port an adaptor is necessary for the filter port Note The E 57 Electro Lift Unit has a non adjustable pressure relief valve 7 Flush the complete system including unit hoses and power angling rams with Meyer Hydra Flush Fluid M 2 To Ignition Switch FUSE Accessory Side Motor Solenoid Must be grounded EC DRAIN PLUGS NS 4 Coupler Weather Cap A Passenger Coupler Power Angling Ram Weather Plug Angle L privers side Power Angling Ram Angle Right 24 SNOW PLOW WILL NOT RAISE Charge Battery Clean and tighten all electrical Connections Are all electrical connections clean and tight Is Battery Charged Is there power going to the motor Does the Motor Operate Is there power leaving the switch Check switch for Continuity Inspect Motor Armature Brushes Repair or Replace Motor as necessary Remove motor Does motor run when 12 volts is applied Is there power going t
22. cket on the E 46 and E 47 the E 46 and E 47 use a 1 2 hex socket on the locknuts REFILL UNIT WITH MEYER M 1 HYDRAULIC FLUID FIGURE 3 40 FIGURE 3 41 Torque cap screws to 45 55 in Ibs using a 3 8 E 47 Follow instructions under or 10mm E 57 hex socket then apply Permatex Replacement of Hydraulic Fluid Form A Gasket No 2 or equivalent sealant around See POST SEASON MAINTENANCE on page 3 each cap screw head 43 CROSSOVER RELIEF VALVE DISASSEMBLY FIGURE 3 42 FIGURE 3 43 Remove Acorn Nut 61 O ring 60 using a 15 16 open Remove Plug 58 and adjusting Screw 59 using a end wrench 3 8 open end wrench FIGURE 3 44 FIGURE 3 45 Remove Plug 58 Adjusting Screw 59 and Disc 57 Remove Pressure Spring 55 44 CROSSOVER RELIEF VALVE DISASSEMBLY FIGURE 3 46 FIGURE 3 47 Remove Poppet 52 Guide 54 Washer 53 Remove Cage 50 O ring 49 using special tool Spacer 56 FIGURE 3 48 Remove bottom O ring 48 using special tool 45 CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3 49 FIGURE 3 50 Correct order when reassembling Crossover Relief Valve Reinstall O ring 48 making certain it is seated to the 47 Note All parts should be dipped in oil prior to their bottom of the cavity assembly FIGURE 3 51 FIGURE 3 52 Install small O ring 51 into top of cage 50 Install small bushing 51 onto poppet 52 46 CROSSOVER RELIEF VALVE REASSEMBLY
23. corrosion GENERAL DESCRIPTION THEORY OF OPERATION ELECTRO LIFT UNIT COMPONENTS SECTION 1 GENERAL DESCRIPTION AND THEORY OF OPERATION CONTENTS FON TO e a S ee Models 46 and 46 ee Models 47 47 and 57 E 57H ELECTRICAL AND FLOW CHARTS 1 112 6 NR American Bosch O 10 11 8 6 Valve CHECK VADE VAINE CROSSOVER RELIEF VALVES a a SWITCH MODELS 46 AND E 46H SWITCHES POWER ANGLING Dual Switch Control Single Lever Control a uiulizi ieiro ileliesb6cjg ue em uuu once e D ED M MUI PM EE GENERAL DESCRIPTION Electro Lift unit is an electrically powered and electrically controlled hydraulic mechanism specifically designed for use with Meyer Snow Plows The standard model E 46 raises and lowers the plow hydraulically with an integral 6 stroke hydraulic cylinder while the model E 46H performs the identical
24. d temperature protected any of these conditions exists the overload light will illuminate The overload light is located just below the float light in the upper left corner of the Touch Pad Reset is accomplished by cycling the power to the Touch Pad via the on off switch located to the left of the cord as it enters the Touch Pad 22 CAUTION When the snow plow is in operation the Electro Touch Control Switch should be in the OFF position SOLENOID SWITCH The Electro Lift motor requires more current amperage to operate than the vehicle wiring vehicle ignition switch or toggle switches have the capacity to handle The solenoid switch is essentially a heavy duty switch with the capacity to handle the heavy current required by the motor It is closed electrically by the solenoid to convey the heavy current directly from the vehicle battery via heavy gauge electrical cable The solenoid which functions essentially the same as the previously described solenoid valves receives its low amperage current at the proper times via the wiring harness This solenoid must be grounded to operate properly FILTERS Cleanliness is perhaps the single most important ingredient in assuring a hydraulic system s reliability Should the hydraulic fluid become contaminated malfunction and permanent damage to the hydraulic system may occur For this reason all the Electro Lift units are equipped with a filter system con
25. e and retainer rings from studs and pull ram out of cylinder Worn packing cup on piston screw the studs into the base Clean reassemble Sump should be replaced if cloth backing is visible Base 30 in reverse order REASSEMBLY ALL MODELS NOTE Notch __ the washer to be underside FIGURE 3 32 FIGURE 3 33 Clean all paint from ram then slide the cylinder over the Install cylinder assembly caretully being certain it seats ram piston assembly using a rubber or leather mallet squarely on ring base Assemble O Ring 13 and Washer 21 as shown 41 REASSEMBLY ALL MODELS FIGURE 3 34 FIGURE 3 35 Reinstall reservoir using mallet to seat reservoir Install cover assembly using mallet to seat cover making squarely certain filter plug is properly located E 46 E 46H amp E 47 E 47H E FIGURE 3 36 FIGURE 3 37 Drain plug and filters to be torqued to 75 85 in Ibs with Torque the bolts to 100 125 in Ibs using a 1 4 hex key an 11 16 hex socket Remove nuts from pump studs or Allen Socket and screw into base 42 REASSEMBLY ALL MODELS E FIGURE338 FIGURE 3 39 Use a flat tool to hold the pump check valve in place and To reinstall motor align pump shaft quill and motor shaft assemble pump Torque the pump to 100 125 in Ibs with appropriate bolt holes Use a 10mm hex socket on On the E 57 use a 1 4 Allen socket on the bolts and on the E 57 and a 3 8 hex so
26. e brush assembly Prestolite obsolete MOTOR 4 1 2 E 57 E 57H Iskra Single and Two terminal The Iskra motor is a four pole electromagnet motor which consists primarily of a 4 1 2 diameter solid steel frame armature brushes field coils and pole pieces This motor can be used on vehicles with either the common negative ground electrical system or the positive ground electrical system HYDRAULIC PUMP The pump in a hydraulic system employs an external source of power to apply a force to a liquid A pump develops no power of its own It simply transfers power from an external source the electric motor on the Electro Lift unit to the liquid in the hydraulic system The basic operating principles of the hydraulic pump used in the Electro Lift units are quite simple Figure 1 7 illustrates the basic components of a positive displacement gear type pump and their functions The pumping action takes place within the pump chamber which is connected to the reservoir by the intake line The pump chamber has an outlet line in which the liquid under motion and pressure leaves the pump to perform work ELECTRIC INTAKELINE DRIVEN GEAR OUTLET LINE PUMP CHAMBER PUMP HOUSING FIGURE 1 7 PRESSURE RELIEF VALVE A basic pressure relief valve is shown in Figure 1 8 It consists of a poppet valve and a valve spring Both are located in a passage which connects the inlet passage to the outlet passage The poppet val
27. enic cleaner If kerosene Parrafinic is used to flush the system the system must be flushed again to remove any kerosene with a Napthenic based cleaner that is wax free FILLER PLUG FIGURE 0 3 Refill Electro Lift unit with M 1 Fluid by fully retracting lift rod Ram and filling reservoir to 1 1 2 below the filler hole On Power Angling models fill and bleed hoses and Power Angling cylinders by loosening hydraulic fittings at cylinders until they leak Power angle plow repeatedly from one side to the other until fluid flows steadily from the leaking fittings while maintaining a constant check on the reservoir fluid level Raise and lower the plow several times and with lift rod fully retracted give a final check to the fluid level and replace filler plug Filters Clean the two filters only one in E 46 and E 46H two in Power Angling units located in base of unit with mineral spirits or equivalent and blow out with compressed air See Figure 0 3 for filter locations Protection Against Rust and Corrosion When the Electro Lift unit is not used for extended periods protect the chromed lift rod Ram by fully extending it and coating it with chassis lubricant Full extension of the lift rod Ram fills the cylinder with hydraulic fluid On Power Angling models coat the exposed portions of the Power Angling cylinder rods Rams with chassis lubricant to protect them against rust and
28. extra set of holes must be drilled and tapped Torque to 45 55 in Ibs Caution Torque to 100 125 in Ibs Locknut 5 16 24 E 46 amp E47 Motor amp Pump Assy 32 STANDARD UP THROUGH C 9 1 1 8 x 6 Stroke E 57 15865 15881 15869 15890 15727 15891 15889 15874 15870 15878 15875 15877 22339 15045 15181 15163 15198 15194 05119 15131 15199 08473 21805 21806 15207 15209 15335 15208 15158 15219 15760 15162 15125 20316 15573 15326 15641 15619 21999 15042 15621 21980 15574 15124 LONG STROKE HM 9 amp HM 10 ONLY 1 1 8 x 8 Stroke E 57H 15866 15885 15869 15890 15727 15891 15889 15874 15870 15878 15875 15877 22339 15204 15131 15163 15198 15194 05119 15131 15199 08473 21805 21806 15205 15209 15761 15206 15158 15219 15760 15162 15125 20316 15573 15326 15641 15619 21999 15203 15621 21980 15574 15124 d PARTS BREAKDOWN 46 47 amp E 47H 57 8 E 57H ELECTRO LIFT PARTS LIST DESCRIPTION Lift Ass y Unit only 12 volt Lift Ass y Unit only 24 volt Pump amp Motor Assy 12 volt Pump amp Motor Assy 24 volt Motor 12 Volt 2 Terminal Motor 24 Volt 2 Terminal Pump e Kit Pump Relief Valve Relief Valve Assy Plug w O Ring Seal Kit Relief Valve Pump Shaft Seal Soc Head 5 16 18 x 1 3 4 Cylinder Tank O Ring 3 1 2 I D O Ring 1 15 16 O
29. f inspect the Pilot Check inspect the the C Are Valve O Rings in good O Rings condition Piston and C Valve valve for binding for binding Replace Coupler sets YES Clean or replace the Crossover Relief NO Replace the P A Block Temporarily put 1 2 blocks between the Sector and A Frame to limit the degree of angle Will the snow plow ea now angle Valve Replace both the Coupler sets and or clean or replace the Does the snow plow now angle Weld 1 1 2 x 1 1 2 x 1 2 spacers to the A Frame stops 21 SNOW PLOW WILL NOT ANGLE RIGHT Can the snow plow Raise Does the motor run when angle switch is pushed Does the snow plow raise instead of angling left Clean or replace the B Valve Retest See the Raise Flow Chart Section Is there power to the motor solenoid White Wire Can the snow plow angle to the Left Does the C Coil have magnetism Green Wire Are C Valve O Rings in good condition Clean or replace the Crossover Relief Does the snow plow now angle Is there power leaving the switch Replace Harness Is there power to the C Coil Green wire at harness Replace the C Coil Retest Replace O Rings Replace both the Coupler sets and or clean or replace the C Valve 28 Replace the Are the wires in molded connector making contact with the switch Replace
30. fasteners which are specified to insure proper reliability and prevent damage due to over tightening PUMP Shaft Seal Replacement NOTE Do not disassemble pump assembly 1 Remove motor as shown in Figures 3 4 and 3 5 page 34 2 Using an appropriate tool pry out the original shaft seal being careful not to damage the shaft or pump housing 3 Liberally coat the replacement seal 1 0 with hydraulic fluid and apply a very light film of Permatex Form A Gasket No 2 or equivalent to the replacement seal O D 4 Carefully slide the replacement seal metal side up over the shaft until it is squarely against the pump housing 5 Center a 11 16 hex deep socket over the seal and use it and a plastic or leather mallet to squarely drive the seal into the pump 6 Replace the motor as shown in Figures 3 39 through 3 40 page 43 ELECTRO Exploded View Caution Torque to tion 100 125 1 108 47 46 19 10 in Ibs Caution Torque to 9 218 2 100 125 in Ibs Caution Torque to Notch on 45 55 in Ibs underside S 64 71 63 70 a 65 8 7 o 73 5 S Q 67 61 54 Caution T t 62 orque to 75 85 in Ibs Adjustable cross over relief valve Note Oil seepage if any at O ring 86 is normal DO NOT attempt to stop this seepage by further tightening of the A Solenoid Acorn Nut Note For Prestolite Motors
31. gle switch is used on the E 46 and E 46H models The positions are Off Center Position e Raise Up Position Lower and Float Down Position In the off position the switch conveys no current In the raise position the switch conveys current to the solenoid switch When released an internal spring returns the toggle to the position In the lower and float position the switch conveys current to the Solenoid Valve When released the toggle will stay in the lower and float position The toggle must be manually returned to the off position SWITCHES Power Angling Models Dual Switch Control Two three position toggle switches are used on the E 47 and E 47H models The first to raise and lower the plow has the same positions as the toggle switch used on the E 46 and E 46 H models However because it functions differently it is a completely different switch In the off position the switch conveys no current In the raise position the switch conveys current to the solenoid switch and the B Solenoid Valve When released an internal spring returns the toggle to the off position ELECTRO LIFT UNIT COMPONENTS CONT SWITCHES Power Angling Models Cont Dual Switch Control The second toggle switch is to angle the plow The positions are Off Center Position e Angle Left Left Position Angle Right Right Position In the off position
32. id switch to supply high amperage current to the unit s motor a wiring harness to distribute low amperage current between the toggle switch or switches motor solenoid and the solenoid valve cartridge s and short heavy gauge cables to distribute high amperage current directly from the positive terminal of the vehicle s battery and ground the unit directly to the negative terminal of the vehicle s battery THEORY OF OPERATION FUNCTIONS The Electro Lift models perform basic functions Because certain of these basic functions are accomplished differently in the models E 46 and 46 as opposed to the Power Angling models will be treated separately where necessary Models E 46 and E 46H The two basic functions performed are Raise snow plow Lower snow plow and float Refer to Figures 1 1 and 1 2 pages 6 thru 9 for electrical and hydraulic flow chart for each function Each figure explains which component is actuated and related in each function Models E 47 47 and E 57 E 57H The four basic functions performed are Raise snow plow Lower snow plow Angle snow plow to right Angle snow plow to left Refer to Figures 1 3 through 1 6 pages 6 thru 18 for electrical and hydraulic flow chart for each function Each figure explains which component is actuated and related in each function w ENSI ASIVd H3MOT 3579 HOLIMS 9 97 3 S 1TSCOW 1
33. is an electrically powered hydraulic mechanism specifically designed for use with the Meyer Snow Plow and is available in four models as follows E 46 Raises and lowers plow hydraulically 2 way and is used with TM ST and C series Snow Plows E 46H Raises and lowers plow hydraulically 2 way and is used with HM series Snow Plows E 47 E 57 Raises lowers and angles plow hydraulically 7 way and is used with TM ST and C series Snow Plows E 47H E 57H Raises lowers and angles plow hydraulically 7 way and is used with the HM and Diamond series Snow Plows Model Identification and Serial Number Location Inclusion of the model number and serial number is extremely important when writing up warranty claim forms and product report forms for proper evaluation and follow up The basic model number is located on the name plate located as shown in Figure 0 1 To determine whether itis the standard or H model measure the dimension shown in Figure 0 1 The serial number is located on the bottom of the base or on the name plate NAME PLATE ob cO N L N LO T N st N r LLI LLI LLI O SERIAL NUMBER ON FRONT SIDE FRONT VIEW FIGURE 0 1 Motor Identification Three different brand motors are used on the Electro Lift units American Bosch Prestolite and Iskra Proper identification of the brand and sup
34. isassembled by removing the internal retaining ring When operating normally the spool can be pushed in approximately 070 However it is generally a better use of one s time to replace the cartridge In the event jamming or some other malfunction cannot be eliminated replace the cartridge since individual parts for it are not available SPECIAL TOOLS Crossover Relief Valve Inner Harden Steel Wire from a Throttle Choke cable FIGURE 3 67 B and C Cartridge Tool 21891 FIGURE 3 68 0 25 x 45 Degree 6 Places Bend Area i 188 um 400 pp 6 50 FIGURE 3 69 Brush holder tool for American Bosch Motor 52 SPECIFICATIONS ELECTRICAL SPECIFICATIONS MOTOR American Bosch M0551046A No load motor not attached to pump NOTE Do not operate motor continuously for more than 30 seconds Applied Voltage 12 Volts DC Max Current Draw 24 Amperes Speed Min 5900 RPM Under load pump operating in relief NOTE Do not operate motor continuously for more than 5 seconds 12 Volts DC 230 Amperes Applied Voltage Max Current Draw ISKRA AMJ4739 12V No load motor not attached to pump NOTE Do not operate motor continuously for more than 30 seconds Applied Voltage 12 Volts DC Max Current Draw 150 Amperes Speed Min 3 200 RPM Under load pump operating in relief NOTE Do not operate motor continuously for more than 5 seconds
35. isassembly Photos Reassembly PROTOS t CROSSOVER RELIEF VALVE alie E n BRUSH REPLACEMENTI Iskra Brush Replacement American Bosch Brush VALVE CARTRIDGES amp C A a ii e OPPP S BAC T UU SPECIAL TOOLS e ene ee ne SPECIFICATION u uuu nee ee 30 GENERAL INFORMATION Using the proper guidelines and precautions all four model Electro Lift units are easy to disassemble and reassemble Figure 3 1 page 32 is an exploded view which applies to all four models It should be used as the primary reference for proper reassembly Where necessary this section includes additional information photographs and illustrations to assure proper and efficient repairs UNIT DISASSEMBLY AND REASSEMBLY Model E 46 E 46H and Power Angling units with the exception of the Power Angling Valve Assembly the parts and disassembly reassembly procedures are common to all models Many repair procedures including removal and replacement of the B and C Solenoid Valves can be accompl
36. ished without removing the unit from the vehicle While Figures 3 2 through 3 62 show the unit clamped in a vise make all possible repairs on the vehicle when possible NOTE Pump Assembly should not be disassembled since it cannot be serviced with the exception of the pressure relief valve pages 19 20 and pump shaft seal which is covered separately in this section Motor should be taken to the appropriate American Bosch or Prestolite authorized service station in your area for all parts and service with the exception of brush replacement Procedure for American Bosch motor brush replacement is covered separately in this section Disassembly Figures 3 2 through 3 11 pages 34 36 Figures 3 25 through 3 31 pages 39 41 for important disassembly points on any of the four models See Figure 3 12 page 36 for important disassembly points on the E 46 and E 46H models See Figures 3 13 through 3 24 pages 36 39 for important disassembly points on the Electro Lift units See Figures 3 42 through 3 48 Pages 44 45 for Crossover Relief disassembly Bi Reassembly See Figures 3 31 through 3 41 pages 41 43 for important reassembly points on any of the four models See Figures 3 49 through 3 62 Pages 46 49 for Crossover Relief reassembly Additional Reassembly Points O Rings Coat liberally with hydraulic fluid and position carefully to minimize possibility of damage during assembly Fasteners Torque all
37. itch at the connector making contact magnetism at harness Black Wire with the switch Replace the fuse Replace Replace Check for short in A Coil Harness harness A Coil Switch connections Replace A Valve Check for a clogged Check for Bent or Replace Does it now lower filter or a blocked Siezed Ram Switch passageway Assembly 26 SNOW PLOW WILL NOT ANGLE LEFT Can the snow plow See the Raise Raise Section Are the wires in Does the motor run Is there power to Is there power molded connector when angle switch 9 MD leaving the switch making contact with 2 1 is pushed White Wire the switch Replace Angle Replace Harness Does the snow plow Is the ampere draw Can the snow plow be Does the angle to the right when less than 100 amperes angled by when NO Relieve the interference raise instead h h between the angling left the angle we 5 while trying to angle the Rams are pushed plow disconnected from A Frame Will the snow plow angle right amp left if not allowed to travel to extreme angled position NO Does pressure remain in angle hose when the motor is not running Clean or replace the Clean or replace the Is the Pilot piston in B Valve C Valve good condition Replace Retest Retest worn sloppy or Missing Piston If both hoses are stiff If one hose 5 stif
38. ned over armature shaft carefully motor top cap as shown slide tool out while pushing down on cap BRUSH FIGURE 3 66 Remove motor from hydraulic unit Remove top cap from motor housing To replace brushes part 15854 start by pushing each brush assembly towards the commutator Remove old assembly from the insulated mounting plate removing retaining screws Replace with a new brush assembly by reversing the above procedure It is recommended that each brush be changed in turn to avoid confusion make sure that each brush assembly is replaced with the correct part that has the brush cable on the the same side Service Kits consist of 2 matching pairs of brush assemblies 50 BRUSH REPLACEMENT American Bosch Brush Replacement 1 The commutator end cap is removed by removing the hex head cap screws as shown in Figure 3 4 While holding the motor in position on the pump remove the commutator end cap Remove the existing brush assemblies and brush springs Install the replacement brush assemblies making certain that the leads do not contact the commutator end cap or commutator and that the chamfered sides of the brushes are away from the springs Also install the replacement springs Tighten the brush holder screws to 35 40 in Ibs Tighten the motor terminal nut to 50 60 in Ibs and the lock nut to 3 5 105 Apply a thin film of American Bosch LU3001 grease or equivalent to the armature shaft where it cont
39. noid Valve and the lift cylinder It prevents the hydraulic fluid in the lift cylinder from leaking back through the B Solenoid Valve which could cause the weight of the plow to angle the plow to the left by forcing hydraulic fluid through the C Solenoid Valve into the right power angling cylinder The other check valve is located between the B and C Solenoid Valves It prevents the hydraulic fluid in either power angling cylinder from being forced through the B Solenoid Valve to the left cylinder PILOT CHECK VALVE The pilot check valve is more sophisticated in that it incorporates a piston in addition to the ball seat and spring It is located between the C Solenoid Valve and reservoir It has two functions The first is to prevent the hydraulic fluid in either power angling cylinder from leaking back to the reservoir The second is to allow the hydraulic fluid from the retracting power angling cylinder during the angling cycle to return to the reservoir This is accomplished by the pressurized hydraulic fluid moving the piston which forces the check ball off its seat CROSSOVER RELIEF VALVE When plowing snow a snow plow can be exposed to damaging forces caused by impact with hidden obstructions ends of curbs etc With power angling these damaging forces can damage not only the snow plow but also the vehicle The crossover relief valve has the function of protecting the snow plow system against
40. o the motor solenoid at White Wire Check Wires at Molded connector YES 5 Ground Cable attached to the Negative Battery Terminal YES the shaft turn by hand YES Replace Fuse Check for short in Harness B Coil Switch Connections Motor Solenoid Electric Motor Replace the Motor Solenoid Replace the Wiring Harness Is the Fuse OK Replace pump Is the fluid level ADD 1 1 1 2 below Fluid filler hole YES NO Does the snow plow angle when the Angle Switch is activated Are the Filters Clogged Does the snow plow Is there pressure angle to the left or flow at the Filter port instead of raising Clean or Replace Filters Is the A Valve stuck in the open position YES YES Disassemble unit Inspect O rings Cylinder Piston assembly Look for blockage in Sump Casting passages Can pump relief pressure NO be adjusted to 1650 50 P S I 46 8 E 47 Clean Replace Retest Does snow plow raise Is the pump shaft turning tightly Replace the Pump Is there power to the B Coil Red Wire at Harness Does the B Coil Red Wire have Is there power leaving the switch at the red wire magnetism YES Are the B Valve NO Replace O Rings in good gt i the wiring Condition 95 harness
41. plier part number is necessary when seeking local parts and service sources The motor with which a specific Electro Lift unit is equipped can be identified by the distinctive characteristics shown in figure 0 2 DOMED COMMUTATOR END COVER BN STEEL STAMPED PRESTOLITE MKW 4007 12V 3 Dia FLAT COMMUTATOR END COVER L 3 Dia STEEL STAMPED AMERICAN BOSCH MO 551046A ISKRA Label 15829 AMJA739 12V 1 6kw 4 1 2 Dia Q B SINGLE and TWO TERMINAL FIGURE 0 2 MAINTENANCE The following maintenance information is intended as a basic guide for providing the Electro Lift unit with the proper service and care Sustained heavy duty operation or operating under adverse conditions may necessitate more frequent servicing General Maintenance Cleanliness The greatest enemy to any hydraulic system is dirt or contamination Therefore cleanliness must be stressed at the time of installation servicing and repairing Vehicle Electrical System Maximum performance and efficiency of the Electro Lift unit requires that the vehicle s electrical system be properly maintained and consist of Battery 70 Amp Hr Minimum or 550 Cold Cranking Amps Alternator 60 Amp Minimum Check Regularly 1 Battery Terminals Must be clean and free of corrosion 2 Electrical Connections Must be free of corrosion and tight 3 Battery Must be in first class condition 4 Alternator o
42. pressed when the armature is pulled by the magnetism When the current flow ceases the magnetic field disappears and the compressed coil spring pushes the armature back to its original de energized position 20 WINDING ARMATURE 1 9 Solenoid Valve The Solenoid Valve is used all Models The Cartridge contains a poppet valve whose static or de energized position is closed Its energized position Is open On all four models the Solenoid Valve retains hydraulic fluid in the lift cylinder It is energized opened to allow the hydraulic fluid to flow from the lift cylinder back to the reservoir enabling the plow to lower by gravity The Solenoid Valve is designed to remain energized open while the plow is lowered plowing snow This is the float feature which insures that the plow maintains contact with the ground contour B Solenoid Valve The B Solenoid Valve is used on the Power Angle Electro Lift models The B Cartridge contains a spool valve whose static de energized position allows the pressurized hydraulic fluid to flow to the Solenoid Valve In the energized position the pressurized hydraulic fluid is diverted to the lift cylinder raising the plow Solenoid Valve The C Solenoid valve is used on the Power Angle Electro models The Cartridge contains spool val
43. r Generator and Regulator Must be functioning to specifications 5 Hydraulic Fluid Reservoir Level A significant drop in hydraulic fluid level indicates a leak which must be located and corrected Insufficient hydraulic fluid may result in severe damage POST SEASON MAINTENANCE Meyer Hydraulic Fluid M 1 Meyer Hydraulic Fluid M 1 is a specially formulated mineral oil which maintains an almost constant viscosity from normal to sub zero temperatures Because it remains free flowing at extremely low temperatures the performance and efficiency are not affected Meyer Hydraulic Fluid M 1 also contains an additive which neutralizes moisture accumulating in the fluid due to condensation It is effective for a maximum of one year s use Meyer Products Inc will not be liable for damages resulting from the use of inferior or other fluids or oils Replacement of Hydraulic Fluid After a season s use completely drain the hydraulic fluid including hydraulic fluid in hoses and cylinders on Power Angling models Drain fluid through filler hole shown in Figure 0 3 or drain hole in base by completely retracting lift rod and unbolting unit to pour fluid out or using a suction pump On Power Angling models disconnect the fittings at the Angling cylinders completely retract the cylinder rods and purge cylinders and hoses of all hydraulic fluid Flush the complete system including unit hoses and Power Angling rams with a non wax Napth
44. sisting E 47 E 57 E 47H E 57H fine screen strainer on reservoir pump inlet A filter screen between the lift cylinder and Solenoid Valve X A high pressure filter on the pressure side of the pump With this system the hydraulic fluid is filtered as it leaves the reservoir on its way to the pump and on the Power Angling units filtered again as it leaves the pump Because clean hydraulic fluid is most important to insure Solenoid Valve reliability the hydraulic fluid leaving the lift cylinder is filtered before passing through the Solenoid Valve The filter screen and high pressure filter are easily removed for periodic cleaning or replacement NOTE Additional filter screens are added to the B and C Cartridge Valves IMPORTANT Should the hydraulic fluid become contaminated it will be necessary to replace all the hydraulic oil in the system The complete system hydraulic unit power angling cylinders and hoses should be flushed Flush the system with Meyer Hydra Flush Fluid M 2 SECTION 2 DIAGNOSIS CONTENTS GENERAL INFORMA TIO N u uu uates cun 24 TE TING IRG 24 RAISE Troubleshooting RT 25 LEAK DOWN Troubleshooting a r 26 LOWER Troubleshooting a 26 ANGLE LEFT Troubleshooting
45. smaller and is located on the back side of the unit See Drawing TESTING TIPS Many tests do not require removing the Electro Lift unit from the vehicle However more thorough testing can be per formed using the Meyer Test Stand which allows direct pressure and amperage readings 1 Using a screwdriver or other small tool to check for magnetism of the solenoid coils Place the tool on the nut securing the coil and have an assistant operate the switch You should feel strong magnetic attraction 2 Use atest light volt meter to determine whether there is power at the harness or switch The current 22154 Electro Touch Control has been redesigned Note The Electro Touch Controller now has raised buttons and its circuitry has been changed from analog to digital functions have not changed For troubleshooting for power at the solenoids do not disconnect wires To check for power prick the wire through the insulation for testing The control knows when a short or an open connection occurs and will go into overload mode for the function being activated To reset the controller turn the switch on and off The Electro Touch Control will not operate if not wired properly Controller must be grounded Orange wire from switch harness attaches to the negative terminal of the battery Reference Form 1 795 for wiring diagram 3 When determining AMP draw of the motor always obtain the highest value possible i e at maximum r
46. task for larger plows with an integral 8 stroke hydraulic cylinder In addition to raising and lowering the plow hydraulically the model E 47 E 47H and E 57 E 57H angles the plow hydraulically left and right via remote hydraulic cylinders The Electro Lift unit consists of a specially designed high torque 12 volt DC motor which is directly coupled to a gear type hydraulic pump The pump obtains its supply of hydraulic fluid from an integral reservoir which totally surrounds the integral hydraulic cylinder which raises and lowers the plow Included in all models is an electrically controlled and powered solenoid valve cartridge A which is energized to allow the plow to lower by gravity The models E 47 and E 57 include an integral valve body which contains two additional electrically controlled solenoid valve cartridges Solenoid valve cartridge B is energized to route the pressurized hydraulic fluid to the integral hydraulic cylinder to raise the plow Solenoid valve cartridge C is energized to route the pressurized hydraulic fluid to the left remote hydraulic cylinder to angle the plow to the right Angling the plow to the left only requires energizing the electric motor since the normal route for the pressurized hydraulic fluid is to the right remote hydraulic cylinder Additional components which control and supply electrical current to the Electro Lift unit are an operator controlled toggle switch a soleno
47. the switch conveys no current In the angle left position the switch conveys current to the solenoid switch When released an internal spring returns the toggle to the off position In the angle right position the switch conveys current to the solenoid switch and to the C Solenoid Valve When released an internal spring returns the toggle to the off position Single Lever Control A single lever control is also used on the Electro Lift models This switch five position functions the same as the two three position toggle switches previously discussed Electro Touch Control Pad IMPORTANT The power lead to the switch should be connected to a terminal on the fuse panel that is HOT ONLY when the ignition switch is in the ON position When the control switch is powered up yellow lights illuminate the arrows of the individual functions The up arrow for raise the left arrow for angle left the right arrow for angle right and the down arrow for lower or float Holding the down arrow for a full second will activate a light located in the upper left corner of the Electro Touch switch This light indicates the snow plow is now in the float position In this position the snow plow will be able to follow the contour of the road and the snow plow can also be angled to the left or right Touching the up arrow will automatically cancel the float position This switch is short circuit open circuit an
48. ve is normally held closed by the valve spring sealing the connecting passage from the pressurized outlet passage The poppet valve being a piston is exposed to the pressurized hydraulic fluid in the outlet passage Whenever the hydraulic pressure against the poppet valve becomes greater than the pressure being exerted on the poppet valve from the opposite direction by the valve spring the poppet valve will open This allows some of the pressurized hydraulic fluid to flow through the connecting passage to the non pressurized inlet passage The effect is to lower the pressure in the outlet passage which will allow the valve spring to close the poppet valve again OUTLET PORT EM POPPET VALVE VALVE SPRING PUMP HOUSING INLET PORT N FIGURE 1 8 ELECTRO LIFT UNIT COMPONENTS CONT Under a condition such as when a hydraulic cylinder is extended to the end of its stroke eliminating additional space for the pressurized hydraulic oil to be pumped into the alternate opening and closing of the poppet valve controls the 5 pressure output and provides an escape for the pressurized hydraulic fluid The pressure relief valve used in the Electro Lift pump while more sophisticated than the one described functions in the same manner The pump pressure relief valve may be adjusted on the E 46 amp E 47 models to the specified pressure of 1650 5 1 by adjusting the set screw after installing a suitable pressure gauge
49. ve whose static de energized position allows the pressurized hydraulic fluid to flow to the right power angling cylinder which angles the plow to the left At the same time it allows the hydraulic fluid being forced from the retracting left power angling cylinder to flow through the Cartridge back to the reservoir In the energized position the pressurized hydraulic fluid is diverted to the left power angling cylinder angling the plow to the right Also the hydraulic fluid being forced from the retracting right power angling cylinder flows through the C Cartridge back to the reservoir ELECTRO LIFT UNIT COMPONENTS CONT CHECK VALVES Check valves are very simple devices that have two basic functions They prevent fluid from passing through them in one direction but they allow fluid to pass through them in the opposite direction In all four Power Angling models a pump check valve is used to prevent hydraulic fluid from leaking back through the pump to the reservoir Its function on the E 46 and E 46H models is more critical since it is the only means by which pressurized hydraulic fluid pumped into the lift cylinder is prevented from leaking out through the pump causing the plow to slowly come down The E 47 and E 57 models incorporate two additional check valves necessary because the and Solenoid Valves being spool valves have some leakage One check valve is located between the B Sole
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