Meyer E-58H - Hydraulic Specifications; Motor Specifications; Solenoid Valve Specifications; Pump Specifications

-75-
Moldboard will not move RCM, HCM are
connected correctly
ELECTRONIC
TROUBLESHOOTING
E-78 & E-88
ELECTRICAL SPECIFICATIONS
MOTOR
ISKRA AMJ4739 12V.
No load (motor not attached to pump)
NOTE: Do not operate motor continuously for
more than 30 seconds.
Applied Voltage 12 Volts DC
Max. Current Draw 150 Amperes
Speed (Min.) 3,200 RPM
Under load (pump operating in relief)
NOTE: Do not operate motor continuously for
more than 5 seconds.
Applied Voltage 12 Volts DC
Max. Current Draw 230 Amperes
SOLENOID VALVES “A”, “B”, “C”, “D” and “E”
Applied Voltage 12 Volts DC
Current Draw 1.5 Amperes
Nominal resistance (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.
HYDRAULIC SPECIFICATIONS
PUMP - Pressure Output
E-58H, E-78 & E-88 (Non Adjustable) 2000 P.S.I.
CROSSOVER RELIEF VALVE
Opening Pressure 3800 + 400 P.S.I.
HYDRAULIC FLUID CAPACITY
NOTE :1 Quart = 32 Fluid Ounces
Model E-58H & E-78
Unit 1 qt., 4.5 oz.
(36.5 oz.)
Hoses & 1-1/2 x 10 Cylinders 16 oz.
Total 1 qt., 20.5 oz.
(52.5 oz.)
Model E-88
Unit 1 qt., 4.5 oz.
(36.5 oz.)
Hoses & 1-1/2 x 10 Cylinders 16 oz.
Hoses & Mounting Cylinder 20 oz.
Total 2 qt., 8.5 oz.
(72.5 oz.)
TORQUE SPECIFICATIONS
Thread Torque
Size (in.lbs.)
Reservoir Cover
Retaining Nuts 5/16-24 100-125
Pump Assembly
Retaining Nuts/Bolts 5/16-24 100-125
End Plate or Valve Block
Retaining Cap Screws 5/16-18 96-120
Motor to Pump Retaining
Cap Screws 1/4-20 45-55
Drain and Filter Plugs 1/2-20 75-85
HYDRAULIC SPECIFICATIONS
Did user press
correct button
on RCM?
Is Plow
Mounted to
truck?
Is there power
to t
he motor?
Harnesses
connected
correctl y?
Does Pump
motor cycle
?
Does E88
icon show
on d
isplay?
Check all electrical
connecti ons, Power
cycle the PCM
UP - Joystick toward display
Dwn - Joystick opposite display
Left - joystick left
Right - Joystick right
No
Yes
Yes
Yes
Yes
No
Mount plow to truck
No
Blade will not move - RCM,HCM are connected correctly
Check all electrical
connecti ons,
Po
wer cycle PCM
No
Does Pump
solenoid
energi
ze?
Check all electrical
connections,
Power cycle PCM
Still does not
en
ergize, Replace
Pu
mp solenoid
Yes
No
Yes
Check all electrical
connections,
Power cycle PCM
Still no motor,
Remove and test
with 12V only.
Replace motor i f
nec
essary
No
Check all electrical
connections,
Power cycle PCM
Angle
solenoids
functional ?
Check all electrical
connections,
Replace solenoids,
Power cycle PCM
Replace PCM
Yes
No
Yes
No