TM 10-3930-675-20-1
0006 00-24
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0006 00
Table 7. Boom System Troubleshooting Procedures (Non-Error Code) - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Boom Locking Pin Cylinders Not Working.
NOTE
If boom locking pin cylinders will not function, raise boom folding cylinders to release pressure on
locking cylinder shafts.
1. Inspect boom locking pin
cylinders for damage and
signs of leakage.
Notify DS Maintenance to
replace damaged or leaking
boom locking pin cylinder(s).
2. Inspect boom folding control
valve for damage and signs of
leakage.
Replace damaged or leaking
boom folding control valve (WP
0170 00).
3. Check boom locking pin
cylinder hydraulic lines and
hoses for damage and signs of
leakage.
a. Tighten loose connections.
b. Replace damaged or leaking
lines and hoses (WP 0180 00).
4. Check cab position proximity
switches
for
obstructions,
damage,
and
proper
adjustment.
Clean, replace or adjust cab
position proximity switches as
required (WP 0075 00).
5. Test boom system operating
pressure (WP 0186 00, test
point no. 11). Operating
pressure should be 3045 psi
(210 bar).
a. If operating pressure is as
specified, replace over-center
control valve (WP 0180 00).
b. Notify DS Maintenance to
replace boom and brake
system hydraulic pump if
pressure is not as specified.
