TM 9-4940-568-34
2-34
Table 2-7. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. CRANE FUNCTIONS DO NOT OPERATE OR OPERATE SLOWLY (Continued).
Test 2.
Install hydraulic pressure test meter on test port. Start FRS. Observe hydraulic pressure.
Have assistant operate either outrigger jack control lever to attempt to raise or lower jack.
Check that hydraulic pressure to five valve bank assembly is 3,000 - 3,200 psi (20,684 to
22,063 kPa).
If hydraulic pressure is not correct, repair shuttle valve circuit(s). Refer to
paragraph 3-37 in this manual.
If hydraulic pressure is correct, go to Test 3.
MANUAL OVERRIDE
TEST PORT
TEST
METER
BAR SENSOR
(0–1000)
OUTRIGGER
JACK LEVERS
