No Plow Functions Except Down 5
NO PLOW FUNCTIONS EXCEPT DOWN
Perform all initial inspections and checks listed on page 2 before beginning test procedure.
NO PLOW FUNCTIONS EXCEPT DOWN
DOES PUMP MOTOR RUN?
Does Starter Solenoid click
when plow is functioned?
Yes
No
Remove Motor from Power Unit (see “DC Motor
Removal” on page 11). Remove Coupler and in-
spect for damage. Is Coupler good?
Yes
No
Note:
When performing the following test procedures, make sure that you test to the vehicle battery
terminals, not to the vehicle ground or DC motor ground.
Yes
No
Is there 12 VDC on
the small terminal of
the Starter Solenoid
with joystick in angle
or up position?
Is there 12 VDC on
both large terminals
of the Starter Sole-
noid with joystick in
angle or up position?
Replace Coupler and inspect Input Shaft on
Hydraulic Pump. Replace parts as required.
Does plow operate correctly?
Install Coupler onto Hydraulic
Pump Shaft and rotate by hand.
Does Pump turn by hand?
No
Yes
Yes
No
Check all wiring and plug connectors from
Starter Solenoid back to joystick control-
ler. Replace or repair as required.
Does plow operate correctly?
Yes
No
End
End
Check Starter Solenoid Mount Plate for
ground. Is ground good?
Yes
No
Check 24” black wire.
Ensure Starter Sole-
noid is connected to
good vehicle ground ei-
ther directly or through
24” black wire.
Replace Starter
Solenoid.
Does plow operate
correctly?
Yes
No
End
Remove, inspect
and clean Pump.
See page 20-22.
Yes
No
Pull Reservoir. Inspect and clean pump intake screen and
tube for damage and/or breakage or plugged condition.
See page 20-22. Repair and/or replace parts as required.
Does plow operate correctly?
Yes
No
End
Replace Starter Solenoid.
Does plow operate correctly?
Yes
No
Is there 12 VDC
at red striped wire
on Motor Power
Terminal?
Yes
No
End
Yes
No
Check red striped wire from
Motor to Starter Solenoid.
Repair or replace parts as
required.
Install jumper cable
from vehicle battery
NEG (-) terminal to
case of motor.
Does motor run?
Repair (page 12).
Replace motor (page 11).
Check black wire from motor to vehicle battery NEG
(-) terminal. Repair and/or replace parts as required.
Does plow operate correctly?
Yes
No
Yes
No
Refer to electrical troubleshooting.
Refer to electrical troubleshooting.
Refer to electrical troubleshooting.
