Normally Closed (NC) Release Valve Test 27
NORMALLY CLOSED (NC) RELEASE VALVE TEST
WARNING: This procedure requires
that the plow be raised and/or low-
ered. Stand clear of plow when it is
raised and/or lowered. FAILURE TO HEED
THIS WARNING CAN RESULT IN SERIOUS
PERSONAL INJURY.
WARNING: Never disconnect any hy-
draulic line or fitting with the unit in
the raised position. Always lower the
unit and relieve pressure before removing
any lines or caps. Allow the system to cool
down before draining oil or handling system
components. Serious burns can result from
contact with hot oil.
NOTE:
There are three possible failures that
could cause the NC Release Valve Solenoid not
to operate. They are joystick, or associated wir-
ing, solenoid coil or cartridge valve.
PHOTO NO. 1000296B
1. Hold the metal end of a screwdriver about
1/8” from the coil nut.
2. Move joystick to the Down position. The met-
al end of the screwdriver should be pulled to
the coil nut.
3. If not, use a voltmeter to test for battery volt-
age at the coil terminal when joystick is in
Down position. See page 23.
4. If battery voltage if present, replace the coil.
See page 15.
5. If no voltage is indicated, check wiring, joy-
stick and grounds, repair or replace as nec-
essary.
6. If above tests are satisfactory, replace car-
tridge valve. See page 15.
