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REPLACE SWASHPLATE  LOWER SEAL  (AVIM)     (Continued) INSTALL LOWER  SEAL
REPLACE SWASHPLATE LOWER SEAL (AVIM)

TM-55-1520-240-23-4 CH-47D Heilcopter Manual
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TM 55-1520-240-23-4 5-126.1 REPLACE SWASHPLATE LOWER SEAL (AVIM)     (Continued) 5-126.1 11. Coat lip of seal (11) and running surface (12) on stationary ring (3) with grease (E190). 12. Install rotating ring assembly (4) on stationary ring (3).  Use a mallet, if needed. 13. Install upper retainer (2) and seal (1) on stationary ring (3) (Task 5-125). CAUTION A bolt that is too long can damage the stationary ring. 14. Check that clearance between end of bolt (8) and stationary ring (3) is at least  0.180 inch. Check that clearance between seals (1 and 10) is  0.005 to 0.070 inch. NOTE Upon reassembly if the 114R3428 seal becomes distorted because of the torque applied to the fasteners then it is permissible to use a phenolic block and hammer to tap the seal down to achieve the correct gap, the 114R3428 seal may still have distortion after achieving the gap tolerance which is acceptable.  The swashplate is to be rotated to ensure the 114R3428 and the 114R3427 are not chafing. 15. Lubricate bearing (13) through fitting (14).  Use grease (E190).  Turn rotating ring (4) while greasing until a fillet of grease appears between grease seals (1 and 10). FOLLOW-ON MAINTENANCE: None END OF TASK Change 2 5-701







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