TM 9-2350-256-34
0009 00
CORRECTIVE ACTION Continued
a.
Adjust hoist winch brake (WP 0058 00).
23. Remove hoist winch brake cover and inspect for worn brake lining.
a.
Replace brake lining (WP 0059 00).
24. Defective counterbalance valve.
a.
Replace counterbalance valve (WP 0053 00).
25. Test mechanical transmission clutch pressure. Install pressure gage in mechanical transmission clutch
pressure hose. For location, refer to TM 9-2350-256-20. With engine operating at 1800 rpm, and power
control valve lever in ON position, normal operating pressure is 150 10 psi (1034 69 kPa).
a.
Remove mechanical transmission and main hydraulic pump assembly (WP 0065 00).
b.
Replace mechanical transmission (WP 0065 00).
WARNING
Test components must be capable of withstanding a working pressure of 19502050 psi (13,44514,135
kPa) (step 26 only).
NOTE
After performing main hydraulic pump test, return all plumbing to original configuration.
26. Test main hydraulic pump. Remove check valve and tee between hose no. 4A and hose no. 4B. Install
main hydraulic pump pressure tester kit between hose no. 4A and hose no. 4B. Install test pressure
gage in tee.
CAUTION
Make sure that the load valve is in full open position before performing test. When performing main
hydraulic pump pressure test, do not restrict oil flow beyond operating pressure.
With main engine operating at 1800 rpm, operating pressure should be 19502050 psi (13,44514,135
kPa) when restricting flow using load valve.
After testing, remove hose no. 4B from pump no. 1. Remove pilot-operated relief and unloading valve
assembly from pump port no. 44. Install hose no. 4B on pump port no. 44.
With main engine operating at 1800 rpm, operating pressure should be 19502050 psi (13,44514,135
kPa) when restricting flow using load valve.
a.
Remove mechanical transmission and main hydraulic pump assembly (WP 0065 00).
b.
Replace main hydraulic pump (WP 0065 00).
27. Inspect system selector valve for improper position.
a.
Place system selector valve lever in MAIN position.
END OF WORK PACKAGE
0009 00-4
