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® 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 Phone (207) 563-2227 email•warranty@meyerproducts.com www.diamondplow.com • email info@diamondplow.com...
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GENERAL DESCRIPTION AND THEORY OF OPERATION ........DIAGNOSIS ............. REPAIR PROCEDURE ..........SPECIFICATIONS ............. 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.
The Electro Lift unit is an electrically powered hydraulic ® mechanism specifically designed for use with the Meyer Three different brand motors are used on the Electro Snow Plow and is available in four models as follows: Lift® units American Bosch, Prestolite and Iskra.
Raise and lower the plow several times and with lift Meyer Products Inc. will not be liable for damages rod fully retracted, give a final check to the fluid level resulting from the use of inferior or other fluids or and replace filler plug.
SECTION 1 - GENERAL DESCRIPTION AND THEORY OF OPERATION CONTENTS GENERAL DESCRIPTION ....................THEORY OF OPERATION ....................• F ........................UNCTIONS •• Models E-46 and E-46H ................... •• Models E-47, E-47H and E-57, E-57H ............• E ..................6-18 LECTRICAL AND HARTS ELECTRO LIFT®...
The Electro Lift models perform basic functions. ® designed for use with Meyer Snow Plows. The standard Because certain of these basic functions are model E-46 raises and lowers the plow hydraulically accomplished differently in the models E-46 and with an integral 6"...
ELECTRO LIFT® UNIT COMPONENTS ELECTRO LIFT UNIT COMPONENTS ® MOTORS ( 3”) E-46, E-46H and E-47, E-47H The 12-volt DC high torque motor used on the Electro Lift units are interchangeable among all four models. ® Its function in all four applications is to drive the hydraulic pump.
ELECTRO LIFT® UNIT COMPONENTS CONT. Under a condition, such as when a hydraulic cylinder WINDING 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 COIL the poppet valve controls the pump’s pressure output and provides an escape for the pressurized hydraulic...
ELECTRO LIFT® UNIT COMPONENTS CONT. CHECK VALVES Check valves are very simple devices that have two In this instance, the pressure is not produced by basic functions: They prevent fluid from passing through the pump but rather by the damaging force. As an them in one direction, but they allow fluid to pass example, assume that the right corner of the plow through them in the opposite direction.
The complete system (hydraulic unit, the Touch Pad. power angling cylinders and hoses) should be flushed. Flush the system with Meyer Hydra-Flush™ Fluid M-2. -22-...
SECTION 2 - DIAGNOSIS CONTENTS GENERAL INFORMATION ................24 TESTING TIPS ....................24 “RAISE” Troubleshooting ................25 “LEAK DOWN” Troubleshooting ..............26 “LOWER” Troubleshooting ................26 “ANGLE LEFT” Troubleshooting ..............27 “ANGLE RIGHT” Troubleshooting ............... 28 “WILL NOT HOLD ANGLE” Troubleshooting ..........29 “CROSSOVER RELIEF VALVE”...
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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 (Accessory Side)
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SNOW PLOW WILL NOT RAISE Charge Battery - Are all electrical Is there power Does the Clean and tighten connections clean going to Motor Operate? all electrical and tight? the motor? Connections. Is Battery Charged? Is there power Inspect Motor - Is there power leaving the Remove motor.
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SNOW PLOW LEAKS DOWN Does the Does the snow plow snow plow drop drop and angle straight down? to the left? Replace Replace Replace "B" Check Valve "B" Valve Sump Base Does it now hold? Does it now hold? Are "A" Valve O-rings Replace O-Rings in good condition? Does "A"...
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SNOW PLOW WILL NOT ANGLE LEFT See the Raise Can the snow plow Flow Chart Raise? Section Are the wires in Does the motor run Is there power to Is there power molded connector when angle switch the motor solenoid? leaving the switch? making contact with is pushed?
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SNOW PLOW WILL NOT ANGLE RIGHT See the Raise Can the snow plow Flow Chart Raise? Section Are the wires in Does the motor run Is there power to Is there power molded connector when angle switch the motor solenoid? leaving the switch? making contact with is pushed?
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SNOW PLOW WILL NOT HOLD ANGLE Is Crossover Relief set Set Crossover Relief to Are the Rams mushy? Are the "C" Valve Does the moldboard 3800 + 400 P.S.I. at 3800 + 400 P.S.I.? Can you push the moldboard O-Rings in poor hold left angle &...
GENERAL INFORMATION Reassembly 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 See Figures 3-31 through 3-41 (pages 41-43) for which applies to all four models. It should be used as important reassembly points on any of the four models.
ELECTRO LIFT ® Exploded View Caution: Torque to Caution: 100-125 in.-lbs. Torque to 10 in.-lbs. Caution: Torque to 100-125 in.-lbs. Caution: Torque to Notch on 45-55 in.-lbs. underside Sealant (A2) (D1) Caution: Torque to 100-125 in.-lbs. Backup O Ring O Ring Backup O Ring Backup...
PARTS BREAKDOWN E-46, E-47 & E-47H E-57 & E-57H ELECTRO-LIFT ® PARTS LIST STANDARD- LONG STROKE- STANDARD- LONG STROKE- UP THROUGH HM-9 & HM-10 UP THROUGH HM-9 & HM-10 ONLY ONLY ITEM 1-1/8" x 6" Stroke 1-1/8" x 8" Stroke QTY.
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. E-46, E-46H & E-47, E-47H E-46, E-46H & E-47, E-47H 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 hex socket on the E-57 and a 3/8"...
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DISASSEMBLY - ALL MODELS E-46, E-46H & E-47, E-47H E-46, E-46H & E-47, E-47H 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.
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DISASSEMBLY - ALL MODELS FIGURE 3-10 FIGURE 3-11 The “A” Cartridge is removed using a 7/8" or 1-1/8" hex The “A” Cartridge is removed. Clean screen by soaking deep socket. cartridge in cleaning solvent. E-46 & E-46H ONLY FIGURE 3-12 FIGURE 3-13 End plate is removed by using a 1/4"...
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DISASSEMBLY - E-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 “B” & “C” Cartridge being removed from valve block. A magnetic probe is extremely useful for removal of Clean cartridges by soaking in kerosene.
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DISASSEMBLY - E-47 & E-57 MODELS FIGURE 3-18 FIGURE 3-19 “B” 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.
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DISASSEMBLY - E-47 & 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.
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DISASSEMBLY - ALL MODELS FIGURE 3-27 FIGURE 3-26 Before removing ram and piston assembly, extend rod Filters removed; soak in kerosene before reassembling. 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"...
FIGURE 3-30 FIGURE 3-31 Remove ram and cylinder assembly from reservoir then Remove nuts, baffle 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.
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REASSEMBLY - ALL MODELS FIGURE 3-35 FIGURE 3-34 Install cover assembly using mallet to seat cover, making Reinstall reservoir using mallet to seat reservoir certain filter plug is properly located. squarely. E-46, E-46H & E-47, E-47H FIGURE 3-36 FIGURE 3-37 Drain plug and filters to be torqued to 75-85 in.
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On the E-57 use a 1/4” Allen socket on the bolts and on the E-46 and E-47 use a 1/2" hex socket on the locknuts. E-46, E-46H & E-47, E-47H REFILL UNIT WITH MEYER M-1 HYDRAULIC FLUID FIGURE 3-40 FIGURE 3-41 Torque cap screws to 45 - 55 in.
CROSSOVER RELIEF VALVE DISASSEMBLY FIGURE 3-43 FIGURE 3-42 Remove Plug (58) and adjusting Screw (59) using a Remove Acorn Nut (61), O-ring (60) using a 15/16” open 3/8” open end wrench. end wrench. FIGURE 3-45 FIGURE 3-44 Remove Pressure Spring (55) Remove Plug (58), Adjusting Screw (59) and Disc (57).
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CROSSOVER RELIEF VALVE DISASSEMBLY FIGURE 3-47 FIGURE 3-46 Remove Cage (50), O-ring (49) using special tool. Remove Poppet (52), Guide (54), Washer (53), 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.
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CROSSOVER RELIEF VALVE REASSEMBLY 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.
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CROSSOVER RELIEF VALVE REASSEMBLY FIGURE 3-57 FIGURE 3-58 Reassemble Poppet (52) into Cage. Reassemble Washer (53) smooth side up. FIGURE 3-60 FIGURE 3-59 Reassemble Spring guide (54) smooth side down. Assemble Spacer (56). -48-...
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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 P.S.I.
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 positioned over armature shaft, carefully motor top cap as shown. slide tool out while pushing down on cap. BRUSH REPLACEMENT OF ISKRA MOTOR FIGURE 3-66 Remove motor from hydraulic unit.
BRUSH REPLACEMENT VALVE CARTRIDGES “A”, “B” and “C” American Bosch Brush Replacement IMPORTANT: The valve cartridges can be damaged beyond repair by bending or denting the tube, the The commutator end cap is removed by removing portion of the cartridge surrounded by the coil. the hex head cap screws as shown in Figure 3-4 Therefore, do not grip the cartridge tube with pliers or clamp it in a vise.
SPECIFICATIONS ELECTRICAL SPECIFICATIONS SOLENOID SWITCH Applied Voltage 12 Volts DC MOTOR Max. Current Draw 5 Amperes American Bosch M0551046A Nominal resistance (ohm meter lead connected to coil No load (motor not attached to pump) lead, other meter lead connected to metal foot) NOTE: Do not operate motor continuously for 2.65 to 4.5 ohms.
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® 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 Phone (207) 563-2227 email•warranty@meyerproducts.com www.diamondplow.com • email info@diamondplow.com...
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