TM 9-2350-256-34
0011 00
CORRECTIVE ACTION Continued
6.
Inspect main hydraulic pump for broken or damaged shaft coupling.
a.
Remove mechanical transmission and main hydraulic pump assembly (WP 0065 00).
b.
Repair or replace shaft coupling (WP 0065 00).
WARNING
Test components must be capable of withstanding a working pressure of 19502050 psi (13,44514,135
kPa) (step 7 only).
NOTE
After performing main hydraulic pump test, return all plumbing to original configuration.
7.
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 port 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).
8.
Test for improperly adjusted pilot-operated relief and unloading valve. Install test gage in valve gage
port. With engine operating at 1800 rpm, and spade in stowed position, place spade combination
control valve lever in RAISE position and adjust relief valve.
a.
Adjust relief pressure to 19502050 psi (13,44514,135 kPa). For location of valve gage port and
adjusting screw, refer to WP 0065 00.
9.
Inspect all hydraulic hoses and connections for visible indication of oil leaks.
a.
Repair leaks or replace hydraulic hose (TM 9-2350-256-20).
10. Inspect system selector valve lever for improper position.
a.
Place system selector valve lever in MAIN position.
0011 00-2
