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
2. Boom Will Not Extend or Retract Properly -
b. If boom will extend and retract
Continued.
normally, but not lift or lower,
replace the main control valve
assembly (WP 0249 00).
c. If test point 8 pressure is not
normal, replace boom and
brake system hydraulic pump
(WP 0246 00).
3. Boom Folding 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. Troubleshooting pump control
circuit (611 solenoid) (WP
50).
c. Replace
steering
and
tophandler pump assembly
(WP 0242 00).
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).
NOTE
DO NOT adjust proximity switch (7210) beyond end of
enclosure.
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.
4. Check cab proximity switch a. Replace
damaged
or
(7210) and solenoid valve
inoperative proximity switch
(6043) operation and wiring
(WP 0076 00).
(WP 0048 00-30).
b. Replace damaged or faulty
solenoid valve (WP 0171 00).
0007 00-76
