TM 55-1520-240-23-5
6-107
INSTALL ENGINE TRANSMISSION
6-107
INITIAL SETUP
Applicable Configurations:
All
Tools:
Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692
Torque Wrench, 100 to 750 Inch-pounds
Sling (T34)
Hoist
Open End Wrench, 1-1/4 Inches
Open End Wrench, 1-1/2 Inches
Rope Guide Line
Materials:
Oil (E254)
Epoxy Primer (E292)
Parts:
Packing
Personnel Required:
Medium Helicopter Repairer (2)
Inspector
References:
TM 55-1520-240-23P
Equipment Condition:
Engine Transmission Quill Shaft Inspected (Task
6-101)
Do not install engine transmissions
that have a prefix letter of ‘P’ in the
input pinion spiral bevel gearshaft
(145D6301) and spiral bevel gearshaft
(145D6302) serial numbers. These
transmissions are considered
unserviceable.
If bolts are not removed from locations
(2 or 3) on engine, damage to
components can result. Modified
engines have cover plates or internal
wrenching plugs installed at locations
(2 and 3).
NOTE
Procedure is similar to install left or
right transmission. Right transmission
is shown here. Differences are notes
in steps.
Ensure there is a coating of epoxy
primer (E292) between the mounting
holes of the engine transmission and
the mounting hardware (8 studs and
washers). A coating of epoxy primer
(E292) shall exist in the mounting
holes and the recessed washer area
of the engine transmission, over the
surface of the eight washers and over
the unthreaded surface of the studs.
No parts shall be installed while
primer is wet.
6-423
