16992210 Rev A
15
SYMPTOM/DIAGNOSTIC
RESULT
FIX
PLOW WON'T ANGLE IN ONE DIRECTION
Check voltage at SC VALVE coil
If no voltage present, check cable and
connections
Replace/repair cable or connections
Confirm ORANGE wire at SC VALVE
Check SC VALVE for contamination
Spool must move freely, and seat area must be
clear of any debris
Remove SC VALVE and check free movement of
spool, clean any chips/debris from valve
Replace SC VALVE
PLOW DRIFTS WHILE PLOWING SNOW
Air in Fluid
Bleed air from system
Slightly loosen fittings to angle cylinders and angle
the plow. Tighten fittings while fluid is escaping.
Do this over an absorbent mat, or hold a rag over
fitting to absorb excess fluid.
Check ANGLE LOCK valve for contamination
Poppet must move freely, and seat and piston area
must be clear of any debris
Remove ANGLE LOCK valve and clean
Replace ANGLE LOCK valve
Check CROSS RELIEF valve for contamination
Poppet must move freely, and seat must be clear
of any debris
Remove CROSS RELIEF valve and clean
Replace CROSS RELIEF valve
OIL IS LEAKING FROM CYLINDERS
Packing is loose
Tighten until leak stops
Rods are pitted
Polish rods with fine steel wool
Replace cylinder
OIL SPRAYS OUT OF VENT PORT IN POWER UNIT
Air in Fluid
Bleed air from system
Slightly loosen fittings to angle cylinders and angle
the plow. Tighten fittings while fluid is escaping.
Do this over an absorbent mat, or hold a rag over
fitting to absorb excess fluid.
Check fluid level
Fluid should be visible in elbow fitting at end of
reservoir.
Remove fluid if necessary - in most cases the
problem will subside as entrapped air dissipates.
PLOWING TIPS
• Know the area you are plowing. Be aware of all hidden obstacles (pipes, drains, berms, etc.)
• Plow with the storm, do not let snow accumulate
• Always lower the plow blade when parking to minimize the risk of the plow dropping and to reduce the load on
the truck suspension.
• When transporting the plow – monitor coolant temperature. If the truck is running hot, adjust the plow position
to allow additional airflow to the radiator.
• Plowing at high speeds increases the potential for damage to your plow AND your truck
TROUBLESHOOTING, continued
