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GENERAL
1.
Check to see that the motor is wired cor-
rectly with tight connections, for the proper
voltage.
2.
Check reservoir oil level.
PROBLEM
1.
Plow does not attach to ve-
hicle
2.
Pump motor does not run
3.
Pump runs with joystick in
neutral position
4.
Plow will not lower
5.
Hydraulic cylinder does not
function or functions slowly,
motor runs
6.
Plow does not remain raised
with joystick in "neutral" posi-
tion
TROUBLE SHOOTING
POSSIBLE CAUSE
A.
Receivers are tipped forward
B.
Prongs recoil out of receivers
when attaching
C.
Park stand pinned too low
A.
Defective solenoid
B.
Defective pump motor
C.
Weak or defective battery
D.
Bad electrical connections
E.
Defective joystick control box
F.
Blown fuse supplying power
to control box
A.
Defective solenoid
B.
Defective joystick control box
C.
Wiring short
A.
Reversed wiring on valve
block
B.
Defective joystick control box
C.
Defective lift return valve or
coil
A.
Weak or defective truck bat-
tery
B.
Oil level low
C.
Hydraulic connection leak
D.
Solenoid valve not opening
properly
A.
Leakage through pump check
valve
B.
Leakage
through
lowering valve
C.
Internal leakage in cylinder
D.
Defective joystick control box
3.
Check that wiring harness relay connec-
tions are wired correctly
4.
Check for external leakage at cylinders,
hoses and power unit.
A.
B.
C.
A.
B.
C.
D.
E.
F.
A.
B.
C.
A.
B.
C.
A.
B.
C.
D.
A.
solenoid
B.
C.
D.
Trouble Shooting 9
REMEDY
Fully collapse lift cylinder and
rotate stop plate up to brace
the lift frame before removing
plow from truck.
Slowly drive into receivers
and set parking brake
Lower receivers by adjusting
park stand
Replace solenoid
Replace brushes or pump
motor
Charge or replace battery
Clean and tighten connec-
tions
Replace control box
Replace fuse
Replace solenoid
Replace control box
Locate and repair
Correct wiring
Replace control box
Replace valve or coil
Charge or replace battery
Add oil (do not overfill)
Tighten or redo connection
Replace valve or coil
Clean valve, or replace
Clean valve, or replace
Repack or replace cylinder
Replace control Box
(Continued On Page 10)
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