V-70 power unit service manual
Contents
1. yo Peny 1UDIH ON 15 pue 4 ZS 26 1441 1 Snow Plow will not Raise Does the S1 Does the Snowplow Yes Solenoid magnetize Yes Replace the S1 Vee or Scoop when the raise Solenoid Cartridge No No switch is pressed Does the the coil plug Red and Black w White stripe Yes Replace the S1 have 12 volts when solenoid Coil the raise switch is pressed Check Harness and Switch Does the S2 Solenoid magnetize Yes Replace the S2 when the raise solenoid Cartridge Switch is pressed Does the Motor Yes Pump Pressure Yes Turn On 2000 5 No No No Replace Pump Relief Valve Does the the coil plug and or Pump Black and Black w White Replace the S2 Stripe have 12 volts when solenoid Coil the raise switch is pressed Check Harness and Switch Does the Motor have k 12 volts to the red Yes ground wire when the Raise Switch or replace Motor is pressed No Check Motor Solenoid for ground and 12 volts on both large terminals and small terminal with White wire 27 Snow Plow will not Lower Does the S3 Does the Snowplow Yes Solenoid magnetize Yes Replace the 53 Raise when the Lower Solenoid Cartridge No switch is pressed Snow Plow Does Not Raise Does the the coil plug Green and Black w White Replace the S3 stripe h2. FIGURE 3 62 FIGURE 3 63 Install pump and torque the four 1 4 20 x 3 allen head Carefully install reservoir to sum base using five 12 24 bolts to 85 90 in Ibs Thread intake tube and return filter x 3 8 self tapping screws into pump and sump base respectively FIGURE 3 64 FIGURE 3 65 Install pump pressure ajustment ball Install pump pressure ajustment spring REASSEMBLY V 70 FIGURE 3 66 FIGURE 3 67 Install the pump pressure adjustment assembly screw Replace the two o rings and install the PA Valve Block The adjustment is achieved by turning the screw Assembly to the Sump Base Torqu the four 1 4 20 x 3 clockwise to increase pump pressure and counter 1 2 allen head bolts to 85 90 in 105 clockwise to decrease pump pressure Proper adjustment is 2000 PSI FIGURE 3 68 FIGURE 3 69 Install dual acting pilot piston with springs on either side Install left and right dual PO check valves with caps into valve block Then install the two PO check valves using a 1 4 allen wrench on either side using a 7 8 wrench 56 REASSEMBLY V 70 FIGURE 3 70 FIGURE 3 71 Install left and right 2900 PSI reliev valve assemblies Install left and right 3000 PSI reliev valve assemblies asnd tighten using a 7 8 wrench asnd tighten using a 7 8 wrench FIGURE 3 72 FIGURE 3 73 Install lower adjust assembly using a 7 8 wrench Lower Install all the solenoid valves into their proper lo
3. mechanism s only moving part it is pulled by the armature Figure 1 13 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 compressed 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 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 the V 68 a pump check valve is used to prevent hydraulic fluid from leaking back through the pump to the reservoir DOUBLE ACTING PILOT CHECK VALVE The pilot check valve is more sophisticated in that it incorporates a piston in addition to the ball seat and spring The pilot check valve opens a passage way using hydraulic pressure which applies force to a piston which then pushes a ball of of its seat to allow fluid to pass thru CROSSOVER RELIEF VALVE When plowing snow a snow plow can be exposed to damag
4. 1014 J TONV lt nmm num S pue 1010 N 02 A JAVA salad 1540000 4548 0062 JAVA 1 1 E 5 45 PUE 1010 N pu91X4 0Z A OL 8 1 OL 9 YIOAYSSSHY 1441 pa FIGURE 1 5 5310 ANWA salad 0002 4548 ONIM ONIM 1441 k 3A IVA 0062 SESS OL 18 Ae 1591 lt 1 1 ZS JOJO 4 9104 FIGURE 1 6 TEINE JAVA MO3HO LO Td TS d 0006 2 Q lt a lt 2 a 454 ONIM LHDIY 1441 WW e ic E 5 gt 5 0062 95 25 4010 N PUud xXy 1 OZ A jo FIGURE 1 7 315 JA TVA salad 0002 3ATVA 0062 7 WAN o mE ONIM WM ZS PUE ONIM 1441 454 AAWA MOSHO 1014 26 JOIOW 1 OZ gt 454 OL 3
5. S3 Cartridge cartridge in cleaning solvent FIGURE 3 8 FIGURE 3 9 The S3 Cartridge is removed using a 7 8 wrench or The S3 Cartridge is removed Clean by soaking deep well socket cartridge in cleaning solvent 41 DISASSEMBLY V 70 FIGURE 3 10 FIGURE 3 11 Coil removed from the S1 Cartridge The S1 Cartridge is removed using a 7 8 wrench or deep well socket FIGURE 3 12 FIGURE 3 13 The S1 Cartridge is removed Clean by soaking Coil removed from the S7 Cartridge cartridge in cleaning solvent 42 DISASSEMBLY V 70 FIGURE 3 14 FIGURE 3 15 The S7 Cartridge is removed using a 7 8 wrench or The S7 Cartridge is removed Clean by soaking deep well socket cartridge in cleaning solvent FIGURE 3 16 FIGURE 3 17 Coil removed from the S5 Cartridge The S5 Cartridge is removed using a 7 8 wrench or deep well socket 43 DISASSEMBLY V 70 FIGURE 3 18 FIGURE 3 19 The S5 Cartridge is removed Clean by soaking Coil removed from the S6 Cartridge cartridge in cleaning solvent FIGURE 3 20 FIGURE 3 21 The S6 Cartridge is removed using a 7 8 wrench or The S6 Cartridge is removed Clean by soaking deep well socket cartridge in cleaning solvent 44 DISASSEMBLY V 70 FIGURE 3 22 FIGURE 3 23 Using a 7 8 wrench loosen and remove lower The lower adjustment assembl is removed Clean by adjustment assembly
6. PRESSURE d Qb4 EIER 16 0 1 V AUS 16 17 06 O III IOO u 16 Edo SDS E EE Sa ee 17 DE C 17 iili 259 7 17 CROSSOVER RELIEF VALVES ct 17 e SOLENOID SWITCH 17 E sate E 17 GENERAL DESCRIPTION V 70 unit is an electrically powered and electrically controlled hydraulic mechanism specifically designed for use with Meyer Super V Snow Plows The V 70 raises and lowers the plow with an integral 8 stroke hydraulic cylinder In addition to raising and lowering the plow hydraulically the V 70 angles the plow wings hydraulically left and right via remote double acting 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 The V 70 includes an integral valve body which contains six electrically controlled solenoid valve cartridges Solenoid valve cartridge S1 S2 S3 S5 S6 and 57 Additional components which control and supply electrical Current to the V 70 unit is an operator controlled Touchpad a solenoid switch to supply high amperag
7. OL A 1 amp FIGURE 1 8 213 gt ANTWA MO3HO 1014 JAVA salad 1540000 4548 mium ONIM 3AWA ch OL Em Gss 1014 3A IVA 0062 1 48 80025 ZS 95 65 65 26 1010 10025 0Z A pe a pu FIGURE 1 9 14 II H 011110 3A VA MOSHO 1 ANWA salad 0002 4548 3ZISHd3N3 LII ONIM Sa lt 5 ONIM 1441 OL 1 E 3534 mE 1019 F 1 33 46 25 5 JOIOW 33A 0Z A FIGURE 1 10 p 15 ELECTRO LIFT UNIT COMPONENTS V 70 UNIT COMPONENTS MOTOR 4 1 2 Two terminal The 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 V 70 unit to the liquid in the hyd
8. and Black w white stripe 35 13 Keyed Ignition Blue COD 24 22 White 6 11 o y Blue Wire Reverse ignal 12 3 y SF Black Light Module B Harness Orange bo Light Module C Harness SECTION 3 REPAIR PROCEDURES CONTENTS 2 37 UNIT DISASSEMBLY AND REASSEMBLY 37 PIG AS SS uuu uuu uu 37 Reassembly 37 Additional Reassembly Points 37 ELECTRO E E 38 Parts Breakdown 39 Disassembly Photos 40 54 Reassembly Photos 55 59 SPECIFICATIONS 60 36 GENERAL INFORMATION Using the proper guidelines and precautions the 70 unit is easy to disassemble and reassemble Figure 3 1 page 38 is an exploded view which applies to the V 70 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 Many repair procedures including removal and replacement of the S1 52 53 S5
9. soaking cartridge in cleaning solvent See figure 3 36 47 DISASSEMBLY V 70 FIGURE 3 34 FIGURE 3 35 Use a 1 4 allen wrench to remove the cap for the Using a small hook type tool pull out the right plow wing right plow wing dual PO check valve dual PO check valve cartridge Clean by soaking cartridge in cleaning solvent FIGURE 3 36 FIGURE 3 37 Use a 1 4 allen wrench to remove the cap for the left Using a small hook type tool pull out the left plow wing plow wing dual PO check valve dual PO check valve cartridge Clean by soaking cartridge in cleaning solvent 48 DISASSEMBLY V 70 FIGURE 3 38 FIGURE 3 39 Use a 3 4 wrench to loosen sae elbow jam nut Then Use a 7 8 wrench to loosen and remove the check remove sae elbow assembly valve assembly FIGURE 3 40 FIGURE 3 41 Check valve assembly is removed Clean by soaking Use a needle nose pliers to remove the spring cartridge in cleaning solvent 49 DISASSEMBLY V 70 FIGURE 3 42 FIGURE 3 43 Use needle nose pliers to remove the dual acting piston Use a hokk type tool to reach in and remove the other spring FIGURE 3 44 FIGURE 3 45 Use a 7 8 wrench to loosen and remove the check valve Use a 7 8 wrench to loosen and remove the check assembly valve assembly Clean by soaking cartridge in cleanining solvent 50 DISASSEMBLY V 70 FIGURE 3 46 FIGURE 3 47 Use a 7 16 wrench to remove the two bolts that fasten Care
10. soaking in cleaning solvent FIGURE 3 24 FIGURE 3 25 Using a 7 8 wrench loosen and remove right side wing Right side wing 3000 PSI relief valve assembly is 3000 PSI relief valve assembly removed Clean by soaking cartridge in cleaning solvent 45 DISASSEMBLY V 70 FIGURE 3 26 FIGURE 3 27 The Cap from the relief valve assembly can be removed Using a 7 8 wrench loosen and remove left side wing with a 7 8 wrench The pressure can be adjusted using 3000 PSI relief valve assembly a 1 4 allen wrench Turn adjusting screw in to raise the pressure and turn out to lower pressure Proper adjustment is 3000 PSI FIGURE 3 28 FIGURE 3 29 Left side wing 3000 PSI relief valve assembly is Using a 7 8 wrench loosen and remove right side wing removed Clean by soaking cartridge in cleaning solvent 2900 PSI relief valve assembly See figure 3 31 46 DISASSEMBLY V 70 FIGURE 3 30 FIGURE 3 31 Right side wing 2900 PSI relief valve assembly is The Cap from the relief valve assembly can be removed removed Clean by soaking cartridge in cleaning solvent with a 7 8 wrench The pressure can be adjusted using a 1 4 allen wrench Turn adjusting screw in to raise the pressure and turn out to lower pressure Proper adjustment is 2900 PSI FIGURE 3 32 FIGURE 3 33 Using a 7 8 wrench loosen and remove left side wing Left side wing 2900 PSI relief valve assembly is 2900 PSI relief valve assembly removed Clean by
11. D SWITCH The V 70 motor requires more current or 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 the V 70 unit is equipped with a filter system consisting of Afine screen strainer on the reservoir pump inlet With this system the hydraulic fluid is filtered as it leaves the reservoir on its way to the pump Periodic cleaning of the filter screen is achieved be removing the reservoir tank shown in the dis assembly section 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 Fl
12. FORM NO 1 1024 April 2011 7 1 7 V 70 power unit service manual Meyer Products LLC 18513 Euclid Ave Cleveland Ohio 44112 1084 Phone 486 1313 Area Code 216 www meyerproducts com email info meyerproducts com 2011 Printed in the U S A FOREWARD This Service Manual includes complete information for servicing the following Electro Lift Units V 70 Super V Hydraulic Unit IMPORTANT Maintenance and repairs must be performed with the moldboard on the 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 SCION 0 GENERAL INFORMATION AND 1 1 GENERAL DESCRIPTION AND THEORY OF OPERATION 9 2 Bre uu uu u u ees 18 3 REPAIR PROCEDURE 36 4 SPECIFICATIONS 60 Meyer Products Inc reserves the right under its continuing product improvement program to change construction or desig
13. S6 and 57 Solenoid Valves can be accomplished without removing the unit from the vehicle While Figures 3 3 through 3 82 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 Disassembly See Figures 3 2 through 3 61 pages 40 54 Reassembly See Figures 3 62 through 3 81 pages 55 59 for important reassembly points Additional Reassembly Points O Rings Coat liberally with hydraulic fluid and position carefully to minimize possibility of damage during assembly Fasteners Torque all fasteners which are specified to insure proper reliability and prevent damage due to over tightening 437 COIL COLOR CODE 51 Hed wire S2 Black wire S3 Green wire S5 Yellow wire S6 Blue W White stripe 57 Purple wire Ground Wire each Coil Black w white stripe RAISE Motor Solenoid 51 S2 LOWER 51 52 53 3 LEFT ANGLE Motor Solenoid Only 8 LEFT EXTEND Motor Solenoid 55 LEFT RETRACT Motor Solenoid 57 RIGHT ANGLE Motor Solenoid 53 RIGHT EXTEND Motor Solenoid 93 56 RIGHT RETRACT Motor Solenoid S3 S7 6 SCOOP Motor Solenoid 52 53 95 56 57 VEE Motor Solenoid 52 S3 57 V 70 Exploded View FIGURE 3 1 PARTS amp INSTALLATION INSTRUCTIONS V 70 ELECTRO LIFT UNIT Parts List Lift Assembly Unit Only Motor 2 Termi
14. ate decal underneath the plastic cover w 1 1 1 J 4 j L J q ADJUSTABLE DROP SPEED SEALED COILS amp CONNECTORS Reliable Over time Construction MAINTENANCE The following maintenance information is intended as a basic guide for providing the V 70 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 or 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 H
15. ave 12 volts when solenoid Coil the lower switch is pressed Check Harness Switch and Lower Adjustment Snow Plow Leaks Down Inspect Replace 51 Cartridge Does the Snow Plow Leak Down Yes Inspect Replace Lift Cylinder Does the Snow Plow Leak Down Inspect Replace Universal Valve Block Assembly snow Plow will not Angle Left lower Does Not Lower Yes Does the Snow plow See Snow Plow Retract the Left Wing Does Not Retract Left Wing Does the Snowplow Yes Does Not Raise Yes See Snow Plow Does the Snow Plow No Does Not Extend Extend the Left Wing Left Wing Check Harness and Switch snow Plow will not Extend the Left Wing Does the Snowplow Yes See Snow Plow Raise Does Not Lower See Snow Plow Does Not Retract Right Wing Does the S5 Solenoid magnetize Replace the S5 when the Left Extend solenoid Cartridge Switch is pressed Does the the coil plug Yellow and Replace the 55 Black w White stripe Solenoid Coil have 12 volts when the left extend switch 15 pressed No Check Harness and Switch 20 snow Plow will not Retract the Left Wing Raise lower Does Not Lower Yes See Snow Plow Does Not Retract Right Wing Does the 57 Solenoid magnetize Replace the 57 when the Left Retract solenoid Cartridge Switch is pressed Does the the coil plug Purple and Black w White Replace the S7 stripe have 12 volts
16. cation adjustment setting is achieved by loosening the jam nut and turn the adjustment screw clockwise to slow how fast the plow drops to the ground or turn the adjument screw counter clockwise to make the plow drop faster 57 REASSEMBLY V 70 FIGURE 3 74 FIGURE 3 75 Tighten each solenoid valve using a 7 8 wrench Install each coil to their respective locations on each solenoid valve FIGURE 3 76 FIGURE 3 77 Tighten coil assembly nut to solenoid valve using a 3 4 Install lift ram elbow assembly and tighten jam nut wrench Do not overtighten using a 3 4 wrench 58 REASSEMBLY V 70 FIGURE 3 78 FIGURE 3 79 Allign pump shaft with motor shaft and carefully install Using a 1 4 allen wrench re install and tighten reservoir motor to sump base Tighten two motor screws using a drain plug 7 16 wrench FIGURE 3 80 FIGURE 3 81 Remove reservoir fill plug Fill Hydraulic Unit with Meyer M 1 Fluid Proper fluid level is just below the neck of the filler hole It must be checked with the Lift Ram and both wing cylinders fully retracted 59 HYDRAULIC SPECIFICATIONS ELECTRICAL SPECIFICATIONS MOTOR Under load pump operating in relief NOTE Do not operate motor continuously for more than 5 seconds Applied Voltage 12 Volts DC Max Current Draw 250 Amperes SOLENOID VALVES 61 S2 S3 55 56 8 57 Applied Voltage 12 Volts DC Current Draw 1 9 Amperes Nominal r
17. d be taken to insure that the control switch is kept dry and free from moisture during normal operation When the control switch is turned On lights illuminate the location of the individual touch pads for the functions of the snow plow Up Angle Left Left Extend Left Retract Angle Right Right Extend Right Retract Scoop Vee and Down Lowering of the snow plow an inch at a time is possible by tapping the down arrow in short intervals Holding down the down arrow will activate a float light located in the upper right corner of the control switch This light indicates the snow plow is now in the Lower 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 automatically cancels the Lower Float position While angling left or right or raising the snow plow if the button is pressed for more than six seconds the operation will be cancelled This feature eliminates unnecessary amp draw from the vehicle charging system This switch is self diagnosing The monitor light is located in the upper left corner next to the float light of the control switch When the monitor light turns on and begins to flash the control switch is sensing a problem with a specific coil connection on the hydraulic unit The label below is on the back side of your control switch Reset is accomplished by turning off the ignition s
18. e current to the unit s motor motor solenoid THEORY OF OPERATION FUNCTIONS The V 70 s eight basic functions performed Raise snow plow Lower snow plow Extend Left Wing Retract Left Wing Extend Right Wing Retract Right Wing Angle Left Angle Right Refer to Figures 1 1 through 1 10 pages 6 thru 15 for electrical and hydraulic flow chart for each function Each figure explains which component is actuated and related in each function 0002 a3zi943N3 a3zi943N3 P ONIM FIGURE 1 1 6 ONIM 1441 OL OL 38189 0062 CS PUB 15 0Z A JAVA 33134 0002 54 3298313 3298313 ONIM 1 41 R de 0062 S PUB 5 15 0Z A FIGURE 1 2 3A IVA salad 1590000 59 ANWA 0062 7 mm ONIM 1441 2 OZ A 1014 454 OL 1331 FIGURE 1 3 JA TVA salad TS d 0006 454 m HlOAd3Su OL FIGURE 1 4 T uIIOAH3S3H ANWA aie OL
19. esistance ohm meter lead connected to coil lead 8 0 ohms 10 MOTOR SOLENOID 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 PUMP Pressure Output V 70 Non Adjustable 2000 PS lI CROSSOVER RELIEF VALVE Opening Pressure 2000 PS HYDRAULIC FLUID CAPACITY NOTE 1 Quart 32 Fluid Ounces Model V 70 Unit 1 55 qt 0 oz 50 oz Hoses Lift Cylinder amp D A 19 oz Total 2 qt 5 oz 69 oz 60 NOTES Bl ELECTAHO LIFT V 70 power unit service manual Meyer Products LLC 18513 Euclid Ave Cleveland Ohio 44112 1084 Phone 486 1313 Area Code 216 www meyerproducts com email info meyerproducts com 2011 Printed in the U S A
20. fully remove the remove the motor from the base the motor to the base Be sure to hold the rotor inside the stator FIGURE 3 48 FIGURE 3 49 Use a 3 16 allen wrench to remove the four bolts that Carefully remove the R emove the PA Block from the fasten the PA Block to the base base Clean by soaking PA Block in cleanining solvent 51 DISASSEMBLY V 70 FIGURE 3 50 FIGURE 3 51 Use a No 2 phillips screwdriver to remove the screws Carefully remove the reservoir from the base Clean which fasten the reservoir to the base reservoir in cleaning solvent FIGURE 3 52 FIGURE 3 53 Carefully unscrew and remove return tube left and Pump filter assembly will slide off of the suction tube suction tube right Clean filter assembly in cleaning solvent 52 DISASSEMBLY V 70 FIGURE 3 54 FIGURE 3 55 Use a 3 16 allen wrench to loosen and remove the four Remove the pump from the base Clean pump in cleaning bolts which fasten the pump to the base solvent FIGURE 3 56 FIGURE 3 57 Clean and ispect pump shaft seal Replace if necessary Loosen jam nut and remove pump pressure adjustment screw 2000 PSI set 53 DISASSEMBLY V 70 FIGURE 3 58 FIGURE 3 59 Remove pump pressure adjustment assembly Remove pump pressure ajustment spring FIGURE 3 60 FIGURE 3 61 Remove pump pressure ajustment ball Inspect base and clean base in cleaning solvent 54 REASSEMBLY V 70
21. ing 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 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 17 designed to open at a specific pressure 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 is factory set to the specified pressure of 2900 amp 3000 PS I this setting is adjustable SOLENOI
22. n details specifications and prices without notice or without incurring any obligation SECTION 0 GENERAL INFORMATION AND MAINTENANCE CONTENTS GENERAL 2 MODEL IDENTIFICATION eren mme nni 2 e MODEL IDENTIFICATION AND SERIAL NUMBER LOCATION 2 MAIN TENANCE 2 GENERAL MAINTENANCE r 2 2 VEHICLE ELECTRICAL SYSTEM 2 AGHECK REGULARLY 2 POST SEASON MAINTENANCE 2 Meyer HYDRAULIC FLUID M 1 2 REPLACEMENT OF HYDRAULIC FLUID 2 e PROTECTION AGAINST RUST AND CORROSION 0 1 4 1 4 3 GENERAL INFORMATION Model Identification The V 70 unit is an electrically powered hydraulic mechanism specifically designed for use with the Meyer E Z Mount Plus Super V Snow Plow system 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 plastic cover The serial number is located on the name pl
23. nal Pump Assembly Allen Head Screw 1 4 20 x 3 Pump Filter Assy Reservoir Drain Plug Self Tapping Screw 12 24 x 3 8 Fill Plug 3 4 14 NPT Reservoir Breather Steel s n 0030015088 amp earlier Reservoir Breather Plastic s n 0030115088 amp later Oil Tube Oil Tube Base Assembly Adjustable Relief Valve Seal Kit All Seals Valve Assembly Coil 51 e Coil S2 53 55 56 amp 57 ee S1 Cartridge Valve S2 53 S7 Cartridge Valve ee 55 amp 56 Cartridge Valve ee Kit Needle Valve Lower Adj Kit Dual PO Check Valve ee Kit Check Valve Assembly Kit Relief Valve Assy 3000 p s i e Kit Relief Valve Assy 2900 p s i Allen Head Screw 1 4 20 x 3 1 2 Parts indented are included in assembly under which they are indented 1 1 1 4 1 1 1 5 1 1 1 1 1 1 1 1 1 1 5 1 3 2 1 1 1 2 2 iN 39 DISASSEMBLY V 70 FIGURE 3 2 FIGURE 3 3 Remove Drain Plug using a 1 4 allen wrench and drain Remove the S2 Coil using a 3 4 wrench all the hydraulic fluid from the Base Tank FIGURE 3 4 FIGURE 3 5 Coil removed from the S2 Cartridge The S2 Cartridge is removed using a 7 8 wrench or deep well socket 40 DISASSEMBLY V 70 FIGURE 3 6 FIGURE 3 7 The S2 Cartridge is removed Clean by soaking Coil removed from the
24. raulic system The basic operating principles of the hydraulic pump used in the V 70 unit is quite simple Figure 1 11 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 RESERVOIR ELECTRIC MOTOR INTAKELINE DRIVEN GEAR DRIVE GEAR OUTLET LINE PUMP CHAMBER PUMP HOUSING FIGURE 1 11 PRESSURE RELIEF VALVE A basic pressure relief valve is shown in Figure 1 12 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 valve 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 16 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
25. s Not Retract Right Wing Does the Snow Plow No See Snow Plow Extend the Right Wi Does Not Extend Aa Right Wing Yes Does the Snow Plow See Snow Plow VEE Does Not VEE Check Harness and Switch Snow Plow will not VEE Does the Snow plow See Snow Plow lower Does Not Lower Yes Does the Snowplow Yes See Snow Plow Does the Snow plow Does Not Retract Snow Plow JA Does Not Raise Retract the Left Wing Loft Wing Yes Does the Snow Plow No See Snow Plow Extend the Left Win Does Not Extend Left Wing Yes Does the Snow plow See Snow Plow Retract the Right Wing Does Not Retract Right Wing see Snow Plow e hi ie j 2 No Does Not Extend TN Right Wing Yes Check Harness and Switch 33 Snow Plow Wing Does Not Hold Position Inspect Replace 4 2000 5 Relief Valves above hoses Is the wing Spongy Fill with Fluid and Bleed out Air Does the Snow plow Wing now hold No Replace 57 Cartridge No Does the Snow plow Wing now hold Does the Snow plow Wing now hold Inspect Replace super V Valve Block Assembly 34 V 70 Wiring Light Module C Harness Hydraulic Solenoid Color Code 51 Red and Black w white stripe S2 Black and Black w white stripe S3 Green and Black w white stripe S5 Yellow and Black w white stripe S6 Blue w white stripe and Black w white stripe S7 Purple
26. spring to close the poppet valve again POPPET VALVE PUMP HOUSING INLET 1 12 Under condition such as when 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 V 70 pump while more sophisticated than the one described functions in the same manner The pump pressure relief valve may be pre set and adjustable to the specified pressure of 2000 PS I SOLENOID VALVES Hydraulic valves are simple in concept and all have the same basic function Control the direction of oil flow 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 V 70 unit much like the typical spark plug WINDING lt COIL ARMATURE Wy FIGURE 1 13 ELECTRO LIFT UNIT COMPONENTS CONT 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
27. t Wing Right Wing 55 Yellow and Black w white stripe cylinder cylinder S6 Blue w white stripe and Black w white live end live end S7 Purple and Black w white stripe TESTING TIPS Many tests do not require removing the Electro Lift unit from the vehicle However more thorough testing can be performed 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 51 52 S3 55 S6 and S7 Place the tool on the nut securing the coil and have an assistant operate the switch You should feel strong magnetic attraction 2 Use a test light or volt meter to determine whether there is power at the harness 3 When determining AMP draw of the motor always obtain the highest value possible i e at maximum raise or maximum angle with motor running 4 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 5 Pump pressure can be measured at an angle hose note pressure at full angle Note The V 70 Unit has a adjustable pressure relief valve 6 Flush the complete system including unit hoses and power angling rams with Meyer Hydra Flush Fluid M 2 V 70 CONTROLLER OPERATION The snow plow should only be in operation when the vehicle ignition switch and the control switch are in the ON position Care shoul
28. ush the system with Meyer Hydra Flush Fluid M 2 SECTION 2 DIAGNOSIS CONTENTS GENERAL INFORMATION 19 TESTING TIPS 19 TROUBLE SHOOTING 20 35 18 DIAGNOSTIC FLOW CHART FOR V 70 Unit These charts are intended to be used as an aid in diagnosing problems on the V 68 unit 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 The power angling cylinders must be installed correctly on to the plow assembly The left cylinder Driver s side has two hoses Attach the left wing 1 4 hose to the rod or live end of left ram Attach the left wing 3 8 hose to the fixed end of left ram Attach the right wing 1 4 hoseto the rod or live end of right ram Attach the right wing 3 8 hose to the fixed end of right ram See Figure 1 2 solenoid wires must be on their proper coil See Figure 2 Figure 1 Figure 2 A Left Win cylinder fixed 422 Right Wing cylinder fixed end kk Lift Cylinder Hydraulic Solenoid Color Code 51 Red and Black w white stripe 52 Black and Black w white stripe S3 Green and Black w white stripe Lef
29. ust below the filler neck Fill and bleed hoses and Power Angling cylinders by loosening hydraulic fittings at cylinders until they leak Power angle wings 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 Proper fluid level is achieved when the plow can be fully raised and both plow wings are extended into the Scoop position Protection Against Rust and Corrosion When the V 70 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 Also put the plow wings in the retracted position so the Angle cylinders do not expose the chrome rod SECTION 1 GENERAL DESCRIPTION AND THEORY OF OPERATION CONTENTS ee eee ere 5 THEORY OF ORERA TION _ ___ _ __ _6 6 5 ius e E 5 ELECTRICAL AND CHARTO NET 6 15 ELECTRO LIFTS UNIT COMPONENTS L uuu 16 ee 16 16
30. when Solenoid Coil the left retract switch is pressed Check Harness Snow Plow will not Angle Right lower Does Not Lower Yes See Snow Plow See Snow Plow Does the Snow plow Does Not Raise Retract the Right Wina Does Not Retract Does the Snowplow Yes Right Wing Yes Does the Snow Plow No Ses Extend the Right Wing Right Wing Yes Check Harness and Switch 30 snow Plow will not Extend the Right Wing lower Does Not Lower Yes See Snow Plow Does Not Retract Right Wing Does the Snowplow Yes Does the S6 Solenoid magnetize Replace the S6 when the Right Extend solenoid Cartridge Switch is pressed Does the the coil plug Blue with white stripe Replace the 55 and Black w White Solenoid Coil stripe 12 volts when the right extend switch 15 pressed and Switch Snow Plow will not Retract the Right Wing See Snow Plow Does Not Lower See Snow Plow Does the Snow Plow Does Not Raise Left Retract work Check Harness and Switch properly See Snow Plow Does Not Retract Left Wing 231 snow Plow will not Scoop lower Does Not Lower Yes See Snow Plow Does Not Retract Does the Snowplow Yes Does the Snow plow Retract the Left Wing See Snow Plow Does Not Raise Left Wing Yes Does the Snow Plow No Extend the Left Wing Left Wing Yes Does the Snow plow See Snow Plow Retract the Right Wing Doe
31. witch or by turning the power switch off momentarily and then back on If the monitor light is still illuminated after attempts to reset the switch have failed contact your nearest authorized Meyer Distributor for repairs 19 gt XxX gt gt gt gt V 70 Operation Chart 20 49 01 JO ON 90145 9 U WM pue pay aJnjie4 plousjos LS I I x XxX gt gt X gt jubu 12894 4 55914 40026 10 osiey ON 94115 HYM M yoejg pue yoe g 4 plouajos 25 9 ay Y 58 40026 10 ejbuy 14 eny 1ybiy ON edis 89 U W M y ejg pue uaa 9 164 9 05 ES 23 yo ojbue aut 191 55944 00025 10 puajx3 ye ON 98145 pue MOJJGA aunjle 4 plouajos 95 2 1441 JIONV ejDue 88914 40026 10 puajx3 14 ON edis 9 pue edujs 05 95 25 X gt gt x gt yay ajbue 1 ay 1 22 91 55914 55914 00025 10
32. ydraulic 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 Filler Cap FIGURE 0 1 V 70 Drain Plug Replacement of Hydraulic Fluid After a season s use completely drain the hydraulic fluid including hydraulic fluid in hoses and cylinders Drain fluid through filler hole shown in Figure 0 1 or drain hole in base by completely retracting lift rod and unbolting unit to pour fluid out or using a suction pump Disconnect the fittings at the Angling cylinders and completely retract the cylinder rods and purge cylinders and hoses of all hydraulic fluid Flush the complete system including unit hoses and angling rams with the M 2 Flushing Fluid or a non wax Napthenic cleaner If kerosene Parrafinic is used to flush the system the system must be flushed again to remove any kerosene with M 2 Flushing Fluid or a Napthenic based cleaner that is wax free Refill V 70 unit with M 1 Fluid by fully retracting lift rod Ram and filling reservoir to j
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