SWIVEL LOCKS SYSTEM VISUAL CHECK (Continued)

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 7-4.3 SWIVEL LOCKS SYSTEM VISUAL CHECK (Continued) 7-4.3 TASK RESULT 1. 2. 3. 4. 5. 6. 7. 8. Lift switch guard (1). Check BRAKE STEER switch (2). Close switch guard (1). Check power steering and swivel lock module (3). Check swivel lock control valve (4). Check wheel brake control valve (5). Check swivel lock actuator (6) on right, landing gear (7). Repeat step 6. for actuator (6) on left landing gear (10). Check power steering module accumula- tor gage (11) for pressure indication. If switch guard (1) or switch (2) is loose or dam- aged, tighten or replace it as required. If module (3) is loose or damaged, tighten or replace it as required. If tubing to module is loose or dam- aged, tighten or replace it as required. If valve (4) is loose or damaged, tighten or replace it as required. If wiring or electrical connector to valve is damaged, repair or replace it as required. If valve (5) is loose or damaged, tighten or replace it as required. If wiring or electrical connector to valve is damaged, repair or replace it as required. If actuator (6) is loose or damaged, tighten or re- place it as required. If hydraulic hose or tube to actu- ator is loose or damaged, tighten or replace it as required. If swivel lock actuator rod (8) is extended between swivel lock pins (9), landing gear-locked, replace actuator (6). Accumulator gage (11) should indicate 3,000 psi or 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: None END OF TASK Change 4 7-143

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