TM 10-3950-672-10
HYDRAULIC SYSTEM
Hard to steer left and right .................................... ..............................................................
Slow or erratic operation of outrigger cylinders ...................... .............................................
Outrigger system will not activate ............................... ........................................................
Outrigger system activates, but selected outrigger will not retract
or extend and lower as desired ............................ .........................................................
Boom raises or lowers erratically ................................ ........................................................
Boom raises or lowers slowly .................................. ...........................................................
Boom will not raise or lower ................................... .............................................................
Erratic operation of telescope cylinder ............................ ....................................................
Telescope cylinder will not extend or retract ........................ ...............................................
Hoist will not raise load ...................................... ................................................................
Hoist will not lower load ...................................... ................................................................
Slow or erratic hoist operation .............................................................................................
Boom swing operations erratic in either direction ................... .. .........................................
Swing brake system will not operate ............................. ......................................................
Table 6-1 lists the common malfunctions which you may find during the operation or maintenance of the crane or
its components. You should perform the tests/inspections and corrective actions in the order listed.
This manual cannot list all malfunctions that may occur, nor all test or inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.
Table 6-1. Operator Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ENGINE WILL NOT CRANK OR CRANKS SLOWLY.
Step 1.
Starting circuit connections loose or corroded.
a.
Inspect connections at starting motor. If tight and
corrosion free, do step 2.
b.
Contact Organizational Maintenance to clean and tighten
connections.
Step 2.
Battery charge low.
a.
Contact Organizational Maintenance to charge/service
batteries.
6-13
