Boss Snowplow MSC08042C Owner's Manual page 89

Troubleshooting Guide
PROBLEM
5. While trying to raise plow,
wing(s) extend prior to
raising plow and will not
retract.
6. Wings drift back when
extended.
7. Plow lowers too fast.
8. Wing(s) will not extend or
extend slowly, motor runs.
DIAGNOSTIC CHECK
Check LOWER Solenoid
Valve.
Check the pressure and
return line routing.
Check wing return solenoid
valve on manifold.
Check pressure
Check flow control valve.
Check hydraulic fluid level.
90
RESULT
Lower solenoid valve may be
stuck open. Replace.
Pressure line MUST be
connected from P on pump to
P on valve manifold. Return
line MUST be connected from
T on pump to T on valve
manifold.
If solenoid valve is
contaminated, clean or
replace.
If pressure relief valve is
contaminated, clean or
replace.
Close flow control valve to
desired drop speed.
Hydraulic fluid level should be
within ¾" from top of reservoir
when lowered and in the V-
position.