Table 3-1. Operator/Crew Troubleshooting Table - CONT
TEST OR INSPECTION
APU - CONT
GENERAL HYDRAULIC FAILURES
Check that APU is running.
Check that hydraulic tank shut-off valve is open (para. 2-4).
If APU has run longer than 30 seconds with the hydraulic tank shut-off valve
closed, the pump may be damaged and the hydraulic system, including filters,
may be contaminated with metal particles.
If valve is closed, shut down APU and notify unit maintenance.
Check fluid level in hydraulic tank.
Fill tank as required (para. 3-3). Operate trailer and recheck fluid level. If fluid level drops, notify unit
Indicator should read in green; if not, notify unit maintenance.
Check hydraulic tank breather cap for restrictions (item 10, para. 4-11, item 10).
If cap is clogged or seal is defective, notify unit maintenance.
Check for external leaks at hydraulic fittings/joints.