ARMY TM 5-5420-212-23
MARINE CORPS TM 08676A-23/3
CHAPTER 3
DIRECT SUPPORT MAINTENANCE
Section I. DIRECT SUPPORT TROUBLESHOOTING
3-1.
GENERAL
Table 3-1 contains malfunctions (or defects) tests/inspection and corrective actions only for those components within the
scope of Direct Support Maintenance repair as authorized by the Maintenance Allocation Chart, Appendix B. The
malfunctions (or defects) are followed by a list of tests or inspections to help to determine probable causes and corrective
actions to take. The tests/inspections and corrective actions should be performed in the order listed.
TABLE 3-1. Direct Support Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(1)
HYDRAULIC JACK 15T & 20T- NOISY PUMP (Paras. 2-26 and 2-33, 3-9 and 3-10).
a.
Check suction valve delivery for dirt.
Clean suction valve seat and oil way.
b.
Check whether fluid has become aerated.
Replace pump plunger seal.
c.
Check for blocked filter.
Clean and flush system and refill with fresh clean fluid.
d.
Check pump for loose, worn or damaged parts.
Replace as necessary.
e.
Check for foreign body (e.g. lint or cotton waste) in system.
Clean system thoroughly.
(2)
HYDRAULIC JACK 15T & 20T - IRREGULAR ACTION.
a.
Check whether fluid has become aerated.
Replace pump plunger seal.
b.
Check whether valves have become blocked.
Clean as necessary.
c.
Check for air pockets in system.
Bleed system thoroughly; add fluid.
3-1
