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
1. Boom Will Not Lift or Lower Properly -
c. If test point 8 pressure is not
Continued.
normal, replace boom and
brake system hydraulic pump
(WP 0246 00).
2. Boom Will Not Extend or Retract Properly.
1. Check for active boom system Perform troubleshooting
procedures to clear error code(s)
2. Ensure hydraulic oil level is Fill hydraulic oil as required (WP
within operating range (WP 0050 00).
NOTE
Extension cylinder leaks appear to be coming from
inside boom assembly.
3. Inspect extension cylinder for Notify SRA to replace damaged
damage and signs of leakage. or leaking extension cylinder.
4. Check extension cylinder a. Tighten loose connections.
hydraulic lines and hoses for b. Replace damaged or leaking
damage and signs of leakage.
lines and hoses (WP 0182 00).
5. Check boom wear plates for Replace worn or damaged boom
wear or damage.
wear plates (WP 0146 00).
6. Check boom and tophandler Calibrate boom and tophandler as
required (WP 0259 00).
7. Test boom control system. a. If boom system operates
Operate the auxiliary pump
normally, the boom control
using the procedure "Lower
system is not at fault, check
boom (Extended or Loaded
boom and brake pump
with a Container)" (TM 10-
pressure (WP 0188 00).
3930-675-10) to test boom b. If boom system does not
control system. (The boom
operate normally, check boom
movements will be extremely
control system.
slow).
8. Test boom system operating a. If test point 9 pressure is not
pressures, test points 8 and 9
normal, replace servo pressure
(WP 0188 00).
reducing valve first, then the
servo control valve (WP 0250
00) if needed.
0007 00-75