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

E-58H Angle Right, Motor and “C” Solenoid
STRAINER
LIFT CYLINDER
SUMP CASTING
RETURN TO RESERVOIR
A
B
VALVE ASSEMBLY
RESERVOIR
LOWER ADJUSTMENT
RETURN FILTER
DUAL PILOT CHECK
RESERVOIR
ANGLE RIGHT
CROSS-OVER RELIEF VALVE 3800 + 400 P.S.I.
POWERANGLING CYLINDERS
POWER ANGLING CYLINDERS
PUMP CHECK VALVE
FILTER PRESSURE PORT
PUMP
PRESSURE RELIEF VALVE NON ADJUSTABLE OPENS at 2000 + 50 P.S.I.
NOT ENERGIZED
ENERGIZED
NOT ENERGIZED
C
"B" CHECK VALVE
-9-
FIGURE 1-4

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 pump’s pressure output and provides an escape
for the pressurized hydraulic fluid.
The pressure relief valve used in the E-58H pump, while
more sophisticated than the one described, functions
in the same manner. The pump pressure relief valve
may be adjusted to the specified pressure of 2000 P.S.I.
by adjusting the set screw after installing a suitable
pressure gauge of 2500 P.S.I. in the circuit.
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 E-58H units much like the typical
“spark plug”.
Coil
FIGURE 1-7
COIL
VALVE SPOOL
WINDING
ARMATURE
FIGURE 1-5
ELECTRO LIFT® UNIT COMPONENTS
RESERVOIR
ELECTRIC
MOTOR
FLOW
OUTLET LINE
INTAKE LINE
PUMP CHAMBER
PUMP HOUSING
DRIVE GEAR
DRIVEN GEAR
FLOW
OUTLET PORT
POPPET
VALVE
VALVE
SPRING
PUMP HOUSING
INLET PORT
FIGURE 1-6
-10-
PRESSURE RELIEF VALVE
A basic pressure relief valve is shown in
Figure 1-6. 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 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.
E-58H UNIT COMPONENTS
MOTOR (4-1/2”)
Iskra - 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 E-
58H unit) to the liquid in the hydraulic system.
The basic operating principles of the hydraulic pump
used in the E-58H units are quite simple. Figure 1-5
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.

“C” Solenoid Valve E-58H & E-78 only
The “C” Solenoid valve is used on the E-58H hydraulic
unit for power angling. The “C” Cartridge contains a
spool valve 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 “C” 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.
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 E-58H a pump check valve is used to prevent
hydraulic fluid from leaking back through the pump to
the reservoir.
The E-58H unit uses one check valve located between
the “B” Solenoid 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
plow to drift down.
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. It is located next to the “C” valve on the E-58H.
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.
-11-
ELECTRO LIFT® UNIT COMPONENTS CONT.
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
valve mechanism’s only moving part, it is pulled
by the armature.
Figure 1-7 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.
“A” Solenoid Valve E-58H
The “A” Cartridge contains a poppet valve whose static
or de-energized position is closed. Its energized
position is open.
The “A” 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 “A” 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 E-58H
The “B” Cartridge contains a poppet valve whose
static or de-energized position is closed. Its energized
position is open.
The “B” Cartridge contains a spool valve whose
(energized) position allows the pressurized hydraulic
fluid to flow to the lift cylinder, raising the plow.
The “B” Cartridge de-energized position retains the
hydraulic fluid in the lift cylinder, holding the plow
up.

ELECTRO LIFT® UNIT COMPONENTS CONT.
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 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.
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 3800 P.S.I. ± 400 this setting is non-
adjustable.
SOLENOID SWITCH
The E-58H 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, all the E-58H units
are equipped with a filter system consisting of:
-12-
• A fine screen strainer on the reservoir pump inlet.
•A high pressure filter on the pressure side of the pump.
•A return filter on the power angling block leading
back to the reservoir..
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 all cylinders is filtered before passing returning
to the reservoir. The filter screen, high pressure and
return filter are easily removed for periodic cleaning or
replacement.
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, mount cylinder and hoses) should
be flushed. Flush the system with Meyer Hydra-Flush™
Fluid M-2.

-13-
SECTION 2 - DIAGNOSIS
CONTENTS
E-58H
GENERAL INFORMATION 14
TESTING TIPS 14
“RAISE” Troubleshooting 15
“LEAK DOWN” Troubleshooting 16
“LOWER” Troubleshooting 16
“ANGLE LEFT” Troubleshooting 17
“ANGLE RIGHT” Troubleshooting 18
“WILL NOT HOLD ANGLE” Troubleshooting 18

-14-
DIAGNOSTIC FLOW CHART FOR
E-58H Unit
These charts are intended to be used as an aid in diagnosing problems on the E-58H 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 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 plow assembly. The left cylinder (Driver’s side) has a hose
attached with a female half of a coupler at the end; the right cylinder (Passenger side) has a hose attached with a male half
of a coupler at the end.
3. The solenoid wires must be on their proper coil. The “A” coil (black and tan wires) on power angling block labeled “BLK”. The
“B” coil (red and tan wires) on power angling block labeled “RED”. The “C” coil (green and tan wires) on power angling
block labeled “GRN”.
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 “A”, “B” and “C”. 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. Proper rotation for the motor is indicated by an arrow located on top side of the (Part # 15889) 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-58H 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.
The controller 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 switch 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.

-15-
E-58H ONLY
S
N
O
W PL
O
W WILL N
O
T RAI
S
E
Does the Motor
Operate?
Is there power
going to
the motor?
Are all electrical
connections clean
and tight?
Is Battery Charged?
Charge Battery -
Clean and tighten
all electrical
Connections.
Remove motor.
Does motor run when
12 volts is applied?
Inspect Motor -
Armature, Brushes
Repair or Replace
Motor as necessary
Is there power
going to the
motor solenoid,
at White Wire?
Is there power
leaving the
switch?
Check switch
for Continuity
Check Wires at
Molded connector.
Can the pump
shaft turn by
hand?
Replace pump.
Replace the
Motor
Solenoid.
Replace the
Wiring
Harness.
Is the Fuse
OK?
Is Ground Cable
attached to the
Negative (-)
Battery Terminal?
Replace the
Touch
Pad
Does the snow plow
angle to the left
instead of raising?
Does the snow plow
angle when the
Angle Switch
is activated?
Is there pressure
(or flow) at the
Filter port?
Is the "A" Valve
stuck in the
open position?
Clean or Replace
"A" Valve.
-Retest -
Does snow plow
raise?
Disassemble unit -
Inspect O-rings,
Cylinder,Piston
assembly.
Look for blockage
in Sump Casting
passages.
Can pump relief
pressure be adjusted
to 2000 P.S.I.
Are the
Filters
Clogged?
Clean
or
Replace
Filters.
Is the motor turning
the proper direction?
Check Brushes for
proper installation or
replace motor.
Replace
the
Pump.
Is the pump
shaft turning
tightly?
Does the motor
armature turn
tightly?
Replace
the
Pump.
Repair or Replace
the motor.
Replace Fuse.
Check for short
in Harness,
"B" Coil, Switch
Connections,
Motor Solenoid,
Electric Motor.
NO NO
NO NO
NO
NO NO
NO
NO
NO NO NO NO NO
NO
NO
NO NO NO
NO
NO
NO
NO
NO NO
YES
YES
YES
YES
YES
YES YES YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES YES YES
YES
YES
YES
Does the "B" Coil
(Red Wire) have
magnetism?
Are the "B" Valve
O-Rings in good
Condition?
Replace
O-Rings.
Clean or
Replace the
"B" Valve
and retest.
Replace P.A. Block
with E-46 plate and
retest. - Does snow
plow Raise now?
Replace
Sump Base.
Replace
P.A. Block
Is there power to
the "B" Coil?
(Red Wire)
at Harness
Is there power
leaving the switch
at the red wire?
Replace
"B" Coil. Replace
the wiring
harness. Replace
Touch Pad
Are wires in
molded connector
making contact
with the switch?
Is the fluid level
1-1/2" below
filler hole?
ADD M-1
Fluid

E-58H ONLY
SN
O
W PL
O
W LEAKS D
O
WN
Does the
snow plow drop
straight down?
Does the snow plow
drop and angle
to the left?
NO
NO
NO
YES YES
NO
NO
NO
NO
NO
NO
NO
SNOW PLOW WILL NOT LOWER
NO
NO
YES YES YES
NO
Replace
"B" Check Valve
Does it now hold?
Replace
"B" Valve
Does it now hold?
Replace
Sump Base
Are "A" Valve O-rings
in good condition?
Does "A" Valve stem
move freely?
Replace O-Rings
Replace "A" Valve
Dissasemble unit
Inspect O-Rings,Cylinder,
PistonAssembly.
Does it hold now? Sump Base
Dissasemble unit
Inspect O-Rings,Cylinder,
Piston Assembly.
Does it hold now?
Replace
Sump Base
Does "A" Coil
(Black Wire) have
magnetism?
Replace "A" Valve
Does it now lower?
Is there power to the
"A" Coil (Black Wire)
at harness?
Is there power leaving
the switch at the
Black Wire?
Is the Touchpad
plugged in completely?
Replace
"A" Coil
Check for a clogged
filter or a blocked
passageway.
(LowerAdj. Screw)
Check for Bent or
Siezed Ram
Assembly. Replace
Touch Pad
Replace
Harness Is Fuse
OK?
YES
Replace the fuse -
Check for short in
harness, "A" Coil,
Plug connections.
YES
YES
Replace
-16-

E-58H ONLY
S
N
O
W PL
O
W WILL N
O
TAN
G
LE LEFT
Can the snow plow
Raise?
See the Raise
Flow Chart
Section
NO
NO
NO
YES YES YES
NO
Is there power to
the motor solenoid?
(White Wire)
Is there power
leaving the switch? Is the Touchpad
plugged in completely
Are "C" Valve
O-Rings in good
condition?
Replace
Piston
Weld
1-1/2" x 1-1/2" x 1/2"
spacers to the A-Frame
stops.
Replace
O-Rings
Replace the
P.A. Block
YES
Will the snow plow angle
right & left if not allowed
to travel to extreme
angled position?
YES
Does the motor run
when angle switch
is pushed?
NO
Replace Harness Replace
Touch Pad
NO
NO
Does the snow plow
angle to the right
the angle left
switch is pushed?
Is the ampere draw
less than 100 amps
while trying to angle
snow plow?
Can the snow plow be
angled by hand when the
P.A. Rams are disconnected
fromA-Frame?
Does the snow plow
raise instead of
angling left?
NO
NO
Relieve the interference
between the
Sector and A-Frame.
NO
Clean or replace the
"C" Valve.
Retest
Is the Pilot piston in
good condition?
(worn/sloppy or missing)
Clean or replace the
"B" Valve.
Retest
Does pressure remain
in angle hose
when the motor
is not running?
NO
NO
YES YES
YES
NO
Temporarily put 1/2" blocks
between the Sector and
A-Frame to limit the degree
of angle. Will thesnow plow
now angle?
Replace both the
Coupler sets and/or
clean or replace the
"C" Valve.
If both hoses are stiff
inspect the Pilot Check
Piston and "C" Valve
for binding.
If one hose is stiff
inspect the the "C"
valve for binding.
Replace Coupler sets.
Clean or replace
the Crossover Relief.
Does the snow plow
now angle?
YES YES
YES
YES
NO
YES
-37-

E-58H ONLY
Replace both the
Coupler sets and/or
clean or replace the
"C" Valve.
S
N
O
W PL
O
W WILL N
O
TAN
G
LE RI
G
HT
Can the snow plow
Raise?
See the Raise
Flow Chart
Section
NO
NO
NO
YES YES
NO
Is there power to
the motor solenoid?
(White Wire) Is there power
leaving the switch?
Are the wires in
molded connector
making contact with
the switch?
Are "C" Valve
O-Rings in good
condition?
Replace the
"C" Coil.
Retest
Replace
O-Rings
Replace the
P.A. Block
YES
Does the motor run
when angle switch
is pushed?
NO
Replace Harness Replace
Touch Pad
Can the snow plow
angle to the Left?
Does the snow plow
raise instead of
angling left?
NO
NO
Does the "C" Coil
have magnetism?
(Green Wire)
Is there power to
the "C" Coil?
(Green wire at harness)
Clean or replace the
"B" Valve.
Retest
NO
YES
Clean or replace
the Crossover Relief.
Does the snow plow
now angle?
YES YES
YES
NO NO
Is there power
leaving the switch?
Are the wires in
molded connector
making contact with
the switch?
YES
Replace Harness
YES
YES
YES
Replace
Touch Pad
SNOW PLOW WILL NOT HOLDANGLE
Bleed air from the system
and snug up gland nuts.
Check couplers and fittings
for leaks.
NO
NO
Does the moldboard
hold left angle & release
from right angle?
Are the "C" Valve
O-Rings in poor
condition? Are Crossover O-Rings
in good condition?
Are the Rams mushy?
Can you push the moldboard
6" to 8" by hand?
NO
Replace O-Rings Replace the
P.A. Block
NO
Change Pilot Check
Ball and Seat.
does snowplow
now hold?
Inspect Crossover Relief.
(Rebuild or Replace)
Does snow plow now
hold angle?
Inspect "C" Valve O-rings
Change if necessary. Does
snow plow now angle?
YES YES
YES
NO
Replace the
P.A. Block
YES
NO
Replace Crossover O-Rings
or complete Crossover.
NO
-18-