TM 10-3930-675-20-1
0006 00-22
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0006 00
Table 7. Boom System Troubleshooting Procedures (Non-Error Code).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Boom Will Not Lift or Lower Properly.
1. Access
maintenance
ECS
display and check for active
hydraulic or electrical system
error codes (WP 0004 00).
2. Ensure that hydraulic oil level
is within operating range (LO
10-3930-675-12).
Fill hydraulic oil as required (LO
10-3930-675-12).
3. Inspect lift cylinders for
obstructions, damage, and
signs of leakage.
a. Remove any obstructions.
b. Notify DS Maintenance to
replace damaged or leaking
lift cylinders.
4. Check lift 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).
5. Ensure that lift cylinder
emergency and float valves are
in closed position.
Close emergency and float valves
as required (TM 10-3930-675-
10).
6. Check cab position proximity
switches
for
obstructions,
damage,
and
proper
adjustment.
Clean, replace or adjust cab
position proximity switches as
required (WP 0075 00).
7. Test boom system operating
pressure (WP 0186 00, test
point
no.
8).
Operating
pressure should be 3480 psi
(240 bar).
a. Notify DS Maintenance to
replace boom and brake
system hydraulic pump if
pressure is not as specified.
b. Notify DS Maintenance to
replace main control valve
assembly.
8. Check
boom
calibration
settings (WP 0197 00).
Calibrate boom as required (WP
0197 00).
2. Boom Will Not Extend or Retract Properly.
1. Access
maintenance
ECS
display and check for active
hydraulic or electrical system
error codes (WP 0004 00).
Perform troubleshooting proce-
dures to clear diagnostic code(s)
(WP 0005 00).
2. Ensure that hydraulic oil level
is within operating range (LO
10-3930-675-12).
Fill hydraulic oil as required (LO
10-3930-675-12).
NOTE
Extension cylinder leaks appear to be coming from inside boom assembly.
3. Inspect extension cylinder for
damage and signs of leakage.
Notify SRA.
