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 TM 55-1905-219-14-3
Table 3-85. Steering Cub Hydraulic Pump - Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Erratic operation of rudder:
Step 1.
Check for defective steering control panel.
Refer to table 3-90.
Step 2
Check for dirt or foreign material in system.
Refer to Direct Support Maintenance.
2. Rudder movement in one direction.
Step 1.
Check for defective directional valve.
Step 2.
Inspect for open cabling.
Check and repair. Refer to Direct Support
Maintenance.
3. Steering system inoperative.
Step 1.
System set for manual operation.
Check steering system to see that all shut-off valves are in
position for steering electrically.
Step 2.
Check for defective pump unit motor controller.
Refer to table 3-206.
Step 3.
Inspect for cylinder by-pass valve that is open.
Close by-pass valve.
Step 4.
Check for low oil tank level.
Add hydraulic oil, type 2135th.
Step 5.
Check for air leak in pump suction line.
Tighten connections if the problem continues.
Refer to Direct Support Maintenance.
3-239
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