TB1--1520--238--20--104
(6) Inspect bearing for nicks, scratches none allowed.
(7) Inspect bearing for corrosion pits, no measurable pits allowed. Surface corrosion is allow-
able.
(8) Use Scotch Brite (NSN 7920--01--146--5127) to clean corrosion and debris from the bearing
surface. Clean bearing surface and teflon race using cheese cloth (NSN 8305--01--125--0725) and alcohol
(NSN 6810--00--205--6786).
(9) Install same spacer shims (11), output flange (3), two bearing retainers (12), and ball bearing
(13) onto bearing hanger (10) in same order and orientation as removed.
(10)Install six bolts (7), six self locking nuts (item 8, P/N MS21042--4), and 12 flat washers (9) with
bolt heads on the same side as the spacer shims.
(11) Torque six self--locking nuts to 65--75 INCH POUNDS above running torque and apply torque
stripes.
(12)Install bearing spacer (5) flat side in, over output flange (3) and against ball bearing (13).
(13)Install spacer shims (11), output flange (3), two bearing retainers (12), bearing spacer (5), and
ball bearing (13) onto bearing hanger (10) in same order and orientation as removed.
(14)Install pilot spacer (2) over input flange (4) with flat side facing out.
(15)Install self locking nut (1) onto threaded end of input shaft (4) and finger tighten.
(16)Ensure that self--locking nut (1), P/N NAS1022C14, has a run--on torque of at least 70 INCH--
POUNDS.
(17)Torque self--locking nut (1) to 700 to 800 INCH POUNDS above running torque and apply a
torque stripe, use a 1/2 inch breaker bar attached to the nutation tool as a torque reactor.
(18) Recheck the breakaway nutation torque IAW paragraph 8.b.
c. The following procedures shall be used to perform the forward hanger bearing cleaning. See Figure
4 for item call out numbers.
(1) Secure hanger bearing to work bench. Match mark flanges, bearing retainer, and mount.
(2) Install the nutation tool the hanger bearing.
(3) Remove self locking nut (1), pilot spacer (2), input flange (4), and bearing spacer (5) from the
hanger bearing subassembly, use a 1/2 inch breaker bar attached to the nutation tool as a torque reactor.
(4) Remove six bolts (7), six self--locking nuts (8), and 12 flat washers (9). Discard self--locking
nuts.
(5) Tag and remove spacer shims (12), output flange (3), two bearing retainers (13), and ball
bearing (14) from bearing hanger supports (10 and 11). Out put flange (3), one retainer (13), and ball bearing
(14) will come off as an assembly.
(6) Inspect bearing for nicks, scratches none allowed.
(7) Inspect bearing for corrosion pits, no measurable pits allowed. Surface corrosion is allow-
able.
(8) Use Scotch Brite (NSN 7920--01--146--5127) to clean corrosion and debris from the bearing
surface. Clean bearing surface and teflon race using cheese cloth (NSN 8305--01--125--0725) and alcohol
(NSN 6810--00--205--6786).
(9) (9). Install same spacer shims (12), output flange (3), two bearing retainers (13), and ball
bearing (14) onto bearing hangers (10 and 11) in same order and orientation as removed.
(10)Install six bolts (7), six self locking nuts (item 8, P/N MS21042--4), and 12 flat washers (9) with
bolt heads on the same side as the spacer shims.
5
