POWER STEERING SYSTEM VISUAL CHECK (Continued)

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 7-5.3 POWER STEERING SYSTEM VISUAL CHECK (Continued) 7-5.3 TASK RESULT 1. Check STEERING CONTROL knob (1). If knob (1) is loose or broken, tighten or replace it as required. If knob (1) is binding or does not return to center, replace steering control box. 2. Check SWIVEL switch (2). If switch (2) is loose or damaged, tighten switch or replace box as required. 3. Check power steering swivel lock module If module (3) is loose or damaged, tighten or replace (3). fault components as required. If hydraulic tubes to module are loose or damaged, tighten or repair them as required. 4. Check power steering control valve (4). If valve (4) is loose or damaged, tighten or replace it as required. If connector (5) is loose or damaged, tighten or re- place it as required. If wires to connector are dam- aged, repair or replace them as required. 5. Check swivel lock control valve (6). If valve (6) is loose or damaged, tighten or replace it as required. If connector (7) is loose or damaged, tighten or re- place it as required. If wires to connector are dam- aged, repair or replace them as required. 6. Check power steering assembly (8). If assembly (8) is loose or damaged, tighten or re- place it as required. If hydraulic tubes to assembly are loose or damaged, tighten or replace them as required. If connector (9) is loose or damaged, tighten or re- place it as required. TASK RESULT 7. Check out-of-phase switch (10). If switch (10) is loose or damaged, tighten or replace it as required. If connector (11) is loose or damaged, tighten or replace it as required. If harness (12) is damaged, repair or replace it as required. 8. Check swivel lock actuator (13). If actuator (13) is loose or damaged, tighten or re- place it as required. If swivel lock actuator rod (14) is extended between swivel lock pins (15) (landing gear-locked), replace actuator (13). 9. Repeat step 8 for actuator (13) on left landing gear. 10. Check power steering module accumulator Accumulator gage (16) should indicate 3,000 psi or gage (16) for pressure indication. utility hydraulic system pressure as indicated on maintenance panel. If pressure is not correct, check accumulator precharge; service if necessary and pressurize to 3,000 psi. If power steering module does not maintain pressure, go to task 7-5.9. FOLLOW-ON MAINTENANCE: Close Right Aft Landing Gear Access Panel END OF TASK Change 4 7-159

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