Lit. No. B64090, Rev. 07
37
June 15, 2010
TROUBLESHOOTING
Problem
Cause
Solution
Snowplow will not lift with
magni
fi
cation to the S6 coil.
Hydraulic lock in the manifold.
This occurs if the voltage is
too low on the coils–should be
10 volts.
Loosen cartridge valve S6 to relieve pressure and
retighten. DO NOT OVERTIGHTEN! Valves should
be torqued to a maximum of 24 ft-lb.
Solenoid cartridge valve may be
contaminated.
Remove any foreign objects that may be obstructing
proper valve operation. Replace if not operating
properly after cleaning.
Snowplow will not stay angled
when plowing.
The angle pressure relief valve is
set too low.
NOTE: Increasing the
pressure relief valve will cause
damage to your snowplow. Do not
set the pressure relief greater than
3000 psi.
Check the pressure relief by testing the valve inline
with the cylinder. Attach a tee
fi
tting to the angle
cylinder hydraulic adapter and connect the hose
and pressure gauge to the tee.
NOTE: The setting
should not exceed 3000 psi.
Snowplow will not angle, pump
works.
Review all probable causes
above.
NOTE: Verify coils S3 and S4 for angle functions.
Snowplow lowers too slowly.
Variable
fl
ow control valve is not
adjusted properly.
WARNING: Snowplow can fall suddenly. You
can die or be seriously injured. Drop snowplow
to ground before adjusting
fl
ow control.
Turn
fl
ow control valve counterclockwise in small
increments and test.
Review all probable causes for
snowplow will not lift.
Verify S5 coil (
fl
oat) or S5 and S8 coils (disconnect)
for magnetism.
Snowplow drops sporadically.
Variable
fl
ow control valve is
opened too far.
WARNING: Snowplow can fall suddenly. You
can die or be seriously injured. Drop snowplow
to ground before adjusting
fl
ow control.
Turn clockwise 1/16 turn and test.
Headlamps will not switch from
the vehicle to the snowplow.
No power or ground to the
headlamp relay.
Verify the headlamp/ground relay connector is
connected. If the connector is properly attached
replace the headlamp relay(s).
