Problem
Probable Cause(s)
Suggested Remedy
Hydraulic lock in the manifold.
Loosen cartridge valve S5 or S8 to relieve pressure and
retighten. DO NOT OVERTIGHTEN!
Solenoid cartridge valve may be contaminated.
Remove any foreign objects that may be obstructing
proper valve operation. Replace if not operating properly
after cleaning.
Wing will not stay angled when plowing.
The wing pressure relief valve is set too low.
Test the wing pressure relief. Attach a T-fitting with a
NOTE: Increasing the pressure relief valve will cause
fluid PSI gauge to the base end of the wing cylinder.
damage to your plow. Do not set the pressure relief
Pressure relief should not be greater than 1500 PSI.
greater than 1500 PSI.
Review the illustration below to increase the pressure
relief settings.
Plow will not stay angled when plowing.
The angle pressure relief valve is set too low.
Follow the guidelines indicated above; however, the PSI
NOTE: Increasing the pressure relief valve will cause
setting should not exceed 3000 PSI. NOTE: If the plow
damage to your plow. Do not set the pressure relief
is floating back when angled to the right, adjust the left
greater than 3000 PSI.
pressure relief valve and vice versa.
Wing will not move, pump works.
Control station, wire harness or cables may be loose or
Verify control station, wire harness and all cables are
improperly connected.
securely connected. Clean if necessary.
Hydraulic lock in manifold.
Loosen cartridge valves S9 & S10 or S1 & S2 to relieve
pressure and retighten. DO NOT OVERTIGHTEN!
No power to the solenoid.
Verify solenoids S1 & S2 (passenger’s side slide box
retract and extend) and S9 & S10 (driver’s side slide
box retract and extend) are connected properly.
Diagnose the wire harness. Review the plow wire
schematic on page 27 and the vehicle wire schematic
on pages 29-31. If power is present, review the next step.
Solenoids are not receiving power.
Verify that the solenoids are magnetizing. Position a
screwdriver inside of the solenoid. When the respective
function is activated, the screwdriver is drawn to the
side of the solenoid. If the solenoid is not drawn to the
screwdriver, replace the solenoid. If power is present,
review the next step.
Solenoid cartridge may be contaminated or damaged.
Determine a damaged cartridge valve by reversing the
A bent cartridge will not allow the valve to move freely
driver’s side and passenger’s side cartridge valves.
inside of the cartridge.
Replace valve if necessary.
Plow will not angle, pump works.
Review all probable causes above.
NOTE: Verify solenoids S3 & S4 for angle functions.
Troubleshooting Guide (2 of 2)
55
Variable Flow Control Valve
S10
RV1
RV2
S9
S4
S6
S8
S1
S2
RV5 FC
S5
S7
RV3
RV4
S3
L-WINGEXT L-SLDRET
R-WINGEXT
R-SLDRET
Right Wing Pressure Relief
Angle Pressure Relief
Left Wing Pressure Relief
Should your snowplow develop other problems not indicated in the Troubleshooting Guide, contact your local dealer for technical assistance and/or replacement parts.
Technical support can also be obtained calling our Customer Service Department at 1-888-680-8600, Monday - Friday, 8AM - 5PM EST.
www.storksplows.com
