TM 9-4940-568-34
2-33
Table 2-7. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Unless called for in the test being done, all pressure tests will be done with FRS
24 V MASTER switch in the ON position, and hydraulic oil temperature at
130-150 F (54-66 C).
Unless advised otherwise, the crane MAIN POWER switch must be in the ON
position for all checks.
Crane manual override valve is in “normal” position (turned in and locked).
Before performing troubleshooting procedures, make sure there are no restrictions
in pressure or return lines.
Test 1.
Check hydraulic pressure to crane. Refer to paragraph 4-3 in this manual.
If hydraulic pressure is correct, go to Test 2.
If hydraulic pressure is not correct, adjust or replace hydraulic pump. Refer to
paragraph 4-2 or 4-3 in this manual.
MAIN POWER
PRESSURE
LINES
RETURN
LINES
