Blizzard Power Plow 8611 Assembly & Operation Manual page 40

Problem
Plow will not lift. Pump works properly.
(Continued from page 37.)
Plow will not lift with magnification to the
S6 coil.
Plow will not stay angled when plowing.
Plow will not angle, pump works.
Wing will not stay angled when plowing.
Wing will not move, pump works.
Plow lowers too slow.
38 Troubleshooting Guide (2 of 3)
Probable Cause(s)
Coils on the manifold may be damaged.
Hydraulic lock in the manifold. This occurs if the voltage is
too low on the coils – should be 10 volts.
Solenoid cartridge valve may be contaminated.
The angle pressure relief valve is set too low.
NOTE: Increasing the pressure relief valve will cause
damage to your plow. Do not set the pressure relief
greater than 3000 PSI (See illustration on page 39.).
Review all probable causes above.
The angle pressure relief valve is set too low.
Note: Increasing the pressure relief valve will cause
damage to your plow. Do not set the pressure relief
greater than 2650 PSI.
Control station, wire harness or cables may be loose
or improperly connected.
Hydraulic lock in the manifold has occurred.
No power to the coils.
Coils are receiving power.
Solenoid cartridge may be contaminated or damaged.
A bent cartridge will not allow the valve to move freely
inside of the cartridge.
Variable flow control valve is not adjusted properly.
(See illustration on page 39)
Suggested Remedy
Remove the S6 coil from the cartridge valve. Position a
screwdriver inside of the coil and push the draw latch
connect/disconnect toggle switch upward. The screw-
driver should be magnetically drawn to the coil. Replace
the coil if there is no action.
Loosen cartridge valve S6 to relieve pressure and re-
tighten. DO NOT OVERTIGHTEN! Valves should be
torqued to a maximum of 24 ft. lbs.
Remove any foreign objects that may be obstructing
proper valve operation. Replace if not operating properly
after cleaning.
Check the pressure relief by testing the valve inline with
the cylinder. Attach a tee fitting to the angle cylinder
hydraulic adapter and connect the hose and pressure
gauge to the tee. Push the plow against a solid object
and record the pressure reading. Note: The setting should
not exceed 3000 PSI.
NOTE: Verify solenoids S3 & S4 for angle functions.
Test the wing pressure relief. Attach a fluid PSI gauge to
the quick connect fitting on the manifold. The pressure
relief should not be greater than 2650 PSI. Review the
illustration on page 39 to increase the pressure relief
settings.
Verify control station, wire harness and all cables are
securely connected. Clean if necessary.
Loosen cartridge valves S9 & S10 or S1 & S2 to relieve
pressure and retighten. DO NOT OVERTIGHTEN! Valves
should be torqued to a maximum of 24 ft. lbs.
Verify coils S1 & S2 (pass. side slide box retract and
extend) and S9 & S10 (drive. side slide box retract and
extend) are grounded, connected properly and receiving
power. If no power is available, diagnose the wire harness.
Review the plow wire harness schematic on page 31 and
the vehicle wire schematic on pages 33 & 35. If power is
present, review the next step.
Verify that the coils are magnetizing. Position a screwdriver
inside of the coil. When the respective function is activated,
the screwdriver is drawn to the side of the coil. If the coil is
not drawn to the screwdriver, replace the coil. If power is
present, review the next step.
Determine a damaged cartridge valve by reversing the
driver's side and passenger's side cartridge valves.
Replace valve if necessary.
Turn flow control valve counterclockwise in small incre-
ments and test. NOTE: Never make adjustments when
the plow is in the raised position! Fluid pressure will make
the valve difficult to adjust and serious injury or death can
occur from a falling plow.