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 wont 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 wont 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.