TM 10-3930-675-24-1
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0007 00
Table 7. Boom System Troubleshooting Procedures (Non-Error Code) - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. Boom Folding Cylinders Not Working - 5. Inspect
boom
folding a. Tighten loose connections.
Continued.
cylinders and hydraulic lines b. Replace damaged or leaking
and hoses and boom folding
lines and hoses (WP 0181 00).
control valve for damage and c. Replace damaged or leaking
signs of leakage.
boom folding control valve
(WP 0172 00).
d. Replace damaged or leaking
boom folding cylinder(s) (WP
0253 00).
e. Replace the over-center valve
(WP 0182 00).
4. Boom Locking Pin Cylinders Not Working.
1. Check operation of
all a. If no tophandler functions
tophandler functions.
operate, check tophandler
pump pressure at test point no.
11 (WP 0188 00).
b. Troubleshoot pump control
circuit (611 solenoid) (WP
50).
c. Replace
steering
and
tophandler pump assembly
(WP 0242 00).
NOTE
Raise boom folding cylinders to release pressure on
locking pins before operating locking pin cylinders.
2. Check clearance of cab Move cab closer to the frame.
proximity switch (7210) Adjust cab or proximity switch
between cab and frame. Move (7210) to correct clearance.
the cab to the transport position
(TM 10-3930-675-10).
3. Inspect boom folding control Replace damaged or leaking
valve for damage and signs of boom folding control valve(s)
leakage. Pull back on the bogie (WP 0172 00).
wheel lever and check if bogie
wheel will lift off the locking
collar.
NOTE
DO NOT adjust proximity switch (7210) beyond end of
enclosure.
0007 00-77