Meyer E-58H User manual

FORM NO. 1-822R1
May 2011
E-58H
power unit
service manual
© 2011 Printed in the U.S.A.
Meyer Products LLC
18513 Euclid Ave. • Cleveland, Ohio 44112-1084
Phone [phone] (Area Code 216)
www.meyerproducts.com• email [email protected]

FOREWARD
This Service Manual includes complete information for servicing the following Electro Lift®Units:
E-58H
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 Section Title ..................................................... Page
0 GENERAL INFORMATION AND
MAINTENANCE ........................................................ 1
1 GENERAL DESCRIPTION AND
THEORY OF OPERATION ........................................ 4
2 DIAGNOSIS ............................................................. 14
3 REPAIR PROCEDURE .............................................. 20
4 CONTROLLER TROUBLESHOOTING .................... 38
5 SPECIFICATIONS ..................................................... 39
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
•M
ODEL IDENTIFICATION .................................................... 2
•M
ODEL IDENTIFICATION AND
SERIAL NUMBER LOCATION .............................................. 2
•M
OTOR IDENTIFICATION ................................................... 2
MAINTENANCE ................................................................... 2
•G
ENERAL MAINTENANCE ................................................... 2
•C
LEANLINESS ................................................................. 2
•V
EHICLE ELECTRICAL SYSTEM ........................................... 2
•C
HECK REGULARLY ........................................................ 2
POST-SEASON MAINTENANCE ........................................... 2
•M
EYER HYDRAULIC FLUID M-1 ......................................... 2
•R
EPLACEMENT OF HYDRAULIC FLUID ................................... 3
•F
ILTERS ........................................................................ 3
•P
ROTECTION AGAINST RUST
AND CORROSION ............................................................ 3
-1-

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 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.
GENERAL INFORMATION
Model Identification
The E-58H unit is an electrically powered hydraulic
mechanism specifically designed for use with the Meyer
E-Z Mount Plus, Drive Pro and E-Z Mount Classic Snow
Plow systems.
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 plate decal underneath the plastic cover.
MAINTENANCE
The following maintenance information is intended as
a basic guide for providing the E-58H 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.
-2-

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 E-58H unit with M-1 Fluid by fully retracting lift
rod (Ram) and filling reservoir to 1-1/2 “ below the
filler hole. 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 located in base of unit and
power angling block with mineral spirits or
equivalent and blow out with compressed air. See
Figure 0-1 for filter locations.
Protection Against Rust and Corrosion
When the E-58H 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. Coat the exposed portions of the Power Angling
cylinder rods (Rams) with chassis lubricant to protect
them against rust and corrosion.
FIGURE 0-1
-3-
Filler Plug
Drain Plug
Filter Plugs
Lift Rod

SECTION 1 - GENERAL DESCRIPTION AND THEORY OF OPERATION
CONTENTS
GENERAL DESCRIPTION ................................................................................................. 5
THEORY OF OPERATION................................................................................................. 5
•F
UNCTIONS .................................................................................................................. 5
•E
LECTRICAL AND FLOW CHARTS ...................................................................................... 6-9
ELECTRO LIFT® UNIT COMPONENTS ......................................................................... 9
•M
OTORS ...................................................................................................................... 9
•• Iskra .................................................................................................................... 9
•H
YDRAULIC PUMP .......................................................................................................... 9
•P
RESSURE RELIEF VALVE ................................................................................................ 9
•S
OLENOID VALVES ......................................................................................................... 9-10
•• Cartridge ............................................................................................................ 9-10
•• Coil...................................................................................................................... 9-10
“A” Solenoid Valve ............................................................................................. 11
“B” Solenoid Valve ............................................................................................ 11
“C” Solenoid Valve ........................................................................................... 11
•CHECK VALVES .............................................................................................................. 11
•P
ILOT CHECK VALVE ...................................................................................................... 11
•C
ROSSOVER RELIEF VALVES ............................................................................................ 12
•S
OLENOID SWITCH ........................................................................................................ 12
•F
ILTERS ....................................................................................................................... 12
-4-

GENERAL DESCRIPTION
E-58H unit is an electrically powered and electrically
controlled hydraulic mechanism specifically designed
for use with Meyer Snow Plows. The E-58H raises and
lowers the plow with an integral 8" stroke hydraulic
cylinder.
In addition to raising and lowering the plow
hydraulically, the E-58H 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.
The E-58H includes an integral valve body which
contains three electrically controlled solenoid valve
cartridges. Solenoid valve cartridge “A” which is
energized to allow the plow to lower by gravity.
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. When all cartridge
are not energized and the motor is running the
pressurized hydraulic fluid will flow to the right
remote hydraulic cylinder to angle the plow to the
left.
Additional components which control and supply
electrical current to the E-58H units are an operator
controlled Touchpad or Pistol Grip controller; a
solenoid switch to supply high amperage current to
the unit’s motor (motor 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
Refer to Figures 1-1 through 1-4 (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.
The E-58H four basic functions performed are:
• Raise snow plow
• Lower snow plow
• Angle snow plow to right
• Angle snow plow to left
-5-

E-58H Raise, Motor and “B” Solenoid
STRAINER
LIFT CYLINDER
SUMP CASTING
RETURN TO RESERVOIR
A
B
VALVE ASSEMBLY
RESERVOIR
LOWER ADJUSTMENT
RETURN FILTER
DUAL PILOT CHECK
RESERVOIR
RAISE
CROSS-OVER RELIEF VALVE 3800 + 400 P.S.I.
POWERANGLING CYLINDERS
POWERANGLING CYLINDERS
PUMP CHECK VALVE
FILTER PRESSURE PORT
PUMP
PRESSURE RELIEF VALVE NONADJUSTABLE OPENS at 2000 + 50 P.S.I.
ENERGIZED
NOT ENERGIZED
NOT ENERGIZED
C
"B" CHECK VALVE
-6-
FIGURE 1-1

E-58H Lower, “A” Solenoid
STRAINER
LIFT CYLINDER
SUMP CASTING
RETURN TO RESERVOIR
A
B
VALVE ASSEMBLY
RESERVOIR
LOWER ADJUSTMENT
RETURN FILTER
DUAL PILOT CHECK
RESERVOIR
LOWER
CROSS-OVER RELIEF VALVE 3800 + 400 P.S.I.
POWER ANGLING CYLINDERS
POWERANGLING CYLINDERS
PUMP CHECK VALVE
FILTER PRESSURE PORT
PUMP
PRESSURE RELIEF VALVE NON ADJUSTABLE OPENS at 2000 + 50 P.S.I.
NOT ENERGIZED
NOT ENERGIZED
ENERGIZED
C
"B" CHECK VALVE
-7-
FIGURE 1-2

E-58H Angle Left, Motor only
STRAINER
LIFT CYLINDER
SUMP CASTING
RETURN TO RESERVOIR
A
B
VALVE ASSEMBLY
RESERVOIR
LOWER ADJUSTMENT
RETURN FILTER
DUAL PILOT CHECK
RESERVOIR
ANGLE LEFT
CROSS-OVER RELIEF VALVE 3800 + 400 P.S.I.
POWERANGLING CYLINDERS
POWERANGLING CYLINDERS
PUMP CHECK VALVE
FILTER PRESSURE PORT
PUMP
PRESSURE RELIEF VALVE NONADJUSTABLE OPENS at 2000 + 50 P.S.I.
NOT ENERGIZED
NOT ENERGIZED
NOT ENERGIZED
C
"B" CHECK VALVE
-8-
FIGURE 1-3