Operator's Manual

23
3. Remove screw and replace the valve cone.
4. Inspect or replace two O-Ring's located on
Piston.
5. Replace the O-Ring's on the exterior of the
Housing.
6. Reassemble in opposite sequence.
7. Retest per inspection procedure.
FIG. 8
REPLACE VALVE CONE AND O-RING'S:
1. Disconnect 2-Pin electrical terminal.
2. Remove fork and pull the motor assembly off
the valve housing.
1
1795
3
4
7
6
10
9
2
8
MAINTENANCE
1. Fork 6. O-Rings
2. Housing 7. Screw
3. Valve Cone 8. Housing ASM
4. Fork, Motor ASM 9. Motor Unit
5. Screw 10. O-Rings
CONDITION
POSSIBLE CAUSES
HOW TO CHECK
1. Valve wont open
No electrical power to valve
Manually activate valve with
ignition switch OFF. If stem
moves freely, check and clean
electrical connections. In-
spect Electrical system. The
two-pin connector at each
valve should have 12 volts
with the ignition switch and
the Master ON/OFF Foot
Switch ON. Moving the Indi-
vidual Boom Valve Switch
should reverse the polarity.
2. Valve wont shut off
Valve Cone deteriorated
Pull fork under Individual
Boom Valve motor housing.
Pull motor and stem out of the
base. Inspect and make re-
pairs as necessary.
3. Leakage around bottom
of motor housing
O-Ring deteriorated
4. Blowing fuses
Short circuit in power
Disassemble valve and re-
place O-Ring's.
Inspect wires for worn insula-
tion and check connections.
5. Valve operating properly,
but pressure drop too high.
Obstruction in valve body Remove inlet and outlet con-
nections and inspect body.