TM 55-1520-240-23-45-61.1REPLACE INBOARD DAMPNER UPPER LUG BUSHING(Continued)5-61.11.Using heat gun heat the upper lug (2) on thepitch housing assembly (1) for a maximum of 30minutes.2.Remove bushing (3) from lug (2) discard bushing.NOTEDo not use petroleum based cleaningsolvent.3.Using a clean cloth (E120) wet with acetone(E20), clean upper lug bushing bore (4).4.Inspect the upper lug bore (4) for fretting andcleanliness.NOTEDo not use petroleum based cleaningsolvent.5.Using scotch-brite (E2) wet with acetone (E20)lightly polish upper lug bushing bore (4) toremove debris or fretting.6.Touch-up reworked area with brush alodize(Chemical Film Coating) (E113).7.Measure the upper lug bushing bore (4) at twopoints 90º apart. One reading shall be takenparallel to blade. Maximum dimension for bore(4) is 0.9362 inch maximum.NOTEDo not use petroleum based cleaningsolvent.8.Clean bushing (5) outside diameter and bolt/bushing (6) using a clean cloth (E120) wet withacetone (E20).Wear protective gloves when handlingfrozen or heated parts.NOTEAir dry primer/activator for 5 minutesprior to application of lockingcompound.5-266
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