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INSPECT SHOCK ABSORBER  WITH  ELASTOMERIC  BEARINGS
INSPECT SHOCK ABSORBER WITH ELASTOMERIC BEARINGS     (Continued) - TM-55-1520-240-23-4_550

TM-55-1520-240-23-4 CH-47D Heilcopter Manual
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TM 55-1520-240-23-4 5-87.2 INSPECT SHOCK ABSORBER WITH ELASTOMERIC BEARINGS     (Continued) 5-87.2 2. Check for oil leakage.  Static leakage at any location shall not exceed a slight wetting. Leakage shall be less than  one drop.  If more, replace shock absorber (Tasks 5-87 and 5-93). Perform operational leakage inspection (Task 1-58). 3. Remove nut (2) and bolt (3) securing shock absorber (5) to bracket (6) (Task 5-87). 4. Remove shock absorber rod end bearing (4) from bracket (6). It may be helpful to have helper push on trailing edge of the affected blade to extract rod end from bracket (6). NOTE The elastomeric bearing is bonded to the shock absorber outboard rod end.  If the bearing is found to be unacceptable, replace the entire rod end. 5. Inspect the elastomeric rod end bearing (4) as follows: a. Try to rotate ball (7) by hand.  If the ball rotates, it indicates complete unbonding. Reject the bearing. NOTE If shim is covered by elastomeric material, the bearing is acceptable. Evidence of dust-like particles of elastomeric material or evidence of small particles breaking away from the surface of the elastomeric material are not causes for rejection. b. Check if shim (8) is visible.  If it protrudes above elastomeric material (9), reject the bearing if any of the following conditions exist: (1) Protrusion of shim above plane of bearing housing (10). (2) Unbonding of shim from elastomeric material. NOTE On certain bearings, shims are installed in two pieces.   A split between the shim halves is normal. (3) Broken shim.  Check with a feeler gauge or similar tool. 6. Replace rod end if found unacceptable (Tasks 5-88 and 5-89) and adjust rod end length (Task 5-90).  Go to step 8. 7. If bearing is acceptable, reconnect rod end to blade.  Go to step 12. Change 2 5-529







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