Problem
Possible Cause
Corrective Action
1. The hydraulic-fluid level is low.
1. Check the hydraulic-fluid level; refer
to the Checking the Hydraulic Fluid
section.
2. The power/ground cables or the control
cable are not connected.
2. Connect the cables.
3. The wiring on the valve block is not
connected.
3. Refer to the wiring schematic.
4. The battery is weak or needs replacing.
4. Load a test battery and replace it if
necessary.
5. The motor brushes are bad.
5. Check the motor brushes and replace
them if necessary.
6. The pump pressure relief valve is
set to less than 172 bar (2,500 psi),
contaminated, or damaged.
6. Ensure that the pressure is set to 172
bar (2,500 psi). Check the pressure
again. If it is less than 172 bar (2,500
psi) at the end of the lift, clean or
replace the pressure relief valve.
7. The pump is worn
7. Replace the pump.
8. The Raise control solenoid valve is not
opening completely.
8. Replace the valve.
The plow does not raise or raises slowly.
9. The Lower control solenoid valve is
stuck open.
9. Replace the valve.
1. The A
NGLE
control solenoid valve is
contaminated or damaged.
1. Clean or replace the A
NGLE
control
solenoid valve.
2. The pressure relief valve is
contaminated or damaged.
2. Clean or replace the pressure relief
valve.
The plow angles while plowing.
3. The pressure relief valve is set
incorrectly.
3. Contact your authorized BOSS dealer.
1. The hydraulic-fluid level is incorrect.
1. Ensure that the hydraulic-fluid level
should is within 2 cm (3/4 inch) of the
top of the reservoir when the plow is
lowered.
2. The power/ground cables and/or the
control cables are not connected
properly.
2. Connect the cables if they are not
connected.
3. The wiring connections on the valve
block are not connected properly.
3. Refer to the manifold wiring schematic
included with your
Owner’s Manual
.
4. The battery is damaged or depleted.
4. Load a test battery and replace it if
necessary.
The plow does not angle or angles slowly.
5. The A
NGLE
control solenoid valve does
not open completely.
5. Replace the A
NGLE
control solenoid
valve.
1. The fittings are loose or the O-rings
are damaged.
1. Tighten loose fittings. See your
authorized BOSS dealer for a seal kit.
Fluid leaks from the lift cylinders.
2. The rods are pitted or rough.
2. Polish them with a copus cloth or extra
fine steel wool.
The vehicle battery dies when the vehicle
is turned off.
1. The wire harness isn’t connected to a
keyed fuse source.
1. Connect the wire harness to a
keyed fuse source; refer to the wire
schematic.
1. There is a short in the controller wiring.
1. Repair or replace the controller.
2. There is a short in the wire harness.
2. Repair or replace the wire harness.
The vehicle battery dies when all of the
switches are in the Neutral position.
3. There is a short in the valve coils.
3. Replace the valve coils.
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