TM 9-4940-568-34
2-35
Table 2-7. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 3.
Check that hydraulic pressure to five valve bank assembly is correct with manual override
valve button pulled out. Refer to TM 9-4940-568-10.
While holding the TELESCOPE control lever in the RETRACT position, observe
hydraulic pressure. If hydraulic pressure is 3,000 - 3,200 psi (20,684 to 22,063
kPa), perform Electrical Troubleshooting. Refer to CRANE ELECTRIC
Troubleshooting in this manual.
If hydraulic pressure is not 3,000 - 3,200 psi (20,684 to 22,063 kPa) or override
is stuck, adjust or replace main pressure relief valve or replace manual override
valve. Refer to paragraph 3-33 or 3-42 or 3-46.
END OF TEST
MANUAL OVERRIDE
TEST PORT
TEST
METER
BAR SENSOR
(01000)
OUTRIGGER
JACK LEVERS