TM 55-1520-240-23-3
4-35
INSTALL FORWARD ENGINE MOUNT ADAPTER
(Continued)
4-35
Make sure engine weight is on aft
support link and not on firewall former.
Damage to engine and former can
occur if weight is not on support link.
6.
Install slip-fit bushing (12), shoulder outboard,
in clevis (10).
7.
Install bolt (13), two washers (14), and nut
(15). Raise or lower engine (3) as needed for
clearance.
8.
Adjust firewall former (16) (Task 4-44).
9.
Relax tension on hoist (7).
10.
Torque nut (15) to 375 inch-pounds to seat
bushing. Loosen nut and retorque to 20
inch-pounds above run-on torque. Not to be
less than 70 inch-pounds.
INSPECT
11.
Check barrel nuts (17). Breakaway torque shall
not be less than 7 inch-pounds.
12.
Push four bolts (18) up and over adapter (1).
13.
Torque bolts (18) to 20 inch-pounds above
friction torque.
NOTE
It is acceptable for clearances to vary
inboard to outboard and/or forward
to aft providing the clearance at any
point is within the defined limits.
14.
Measure gap between adapters (1) and caps (8).
Gap shall measure 0.010 to 0.070 inch.
15.
Torque bolts (18) to 105 inch-pounds.
16.
Measure gap between adapters (1) and caps (8).
Gap shall measure 0.010 to 0.070 inch.
NOTE
It is acceptable for clearances to vary
inboard to outboard and/or forward
to aft providing the clearance at any
point is within the defined limits.
17.
Check bolts (18). Bolt threads shall protrude a
minimum of two threads through barrel nuts (17),
but shall not bottom out. Add washers under bolt
head if bolt is bottoming out. Lockwire bolts. Use
lockwire (E231).
4-183
