TM 9-2350-256-34
0010 00
CORRECTIVE ACTION Continued
b.
Replace restricted or damaged hose (TM 9-2350-256-20).
5.
Inspect for broken mechanical transmission and main hydraulic pump shaft coupling.
a.
Remove mechanical transmission and main hydraulic pump assembly (WP 0065 00).
b.
Repair or replace shaft coupling (WP 0065 00).
6.
Test for low hydraulic pressure to mechanical transmission clutch. 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 should be 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).
7.
Inspect mechanical transmission for low oil level.
a.
Add oil to bring to proper level (TM 9-2350-256-20).
8.
Test for faulty mechanical transmission lubrication pump. Remove pipe plug from mechanical
transmission test gage port and install pressure gage. For location of test gage port, refer to TM
9-2350-256-20. With engine operating at 1800 rpm, normal operating pressure is 1015 psi (69103
kPa).
a.
Remove mechanical transmission and main hydraulic pump assembly (WP 0065 00).
b.
Replace mechanical transmission (WP 0065 00).
9.
Test for low hydraulic pressure to mechanical transmission clutch. 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 should be 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).
10. Test for low hydraulic pressure to mechanical transmission clutch. 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 should be 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).
11. Test for hydraulic overload. Remove hose no. 66 from mechanical transmission clutch housing. If
mechanical transmission disengages with hose removed, it indicates a faulty power control valve.
a.
Replace power control valve (WP 0065 00).
12. If mechanical transmission does not disengage with hose removed, it indicates a faulty mechanical
transmission clutch assembly.
a.
Remove mechanical transmission and main hydraulic pump assembly (WP 0065 00).
b.
Replace mechanical transmission (WP 0065 00).
13. Inspect hydraulic reservoir for low oil level.
a.
Add oil to bring to proper level (TM 9-2350-256-20).
0010 00-2
