TM 9-2350-277-20-2
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING
LUBRICATION INSTRUCTIONS Continued
0155 00
ITEM
NO.
INTERVAL
MAN-
HOUR
ITEM TO BE
CHECKED OR
SERVICED
CREWMEMBER
PROCEDURE
EQUIPMENT
NOT READY/
AVAILABLE
IF:
d. Place a small breaker bar, about 2 or 3 feet long,
across the two bolts to check backlash on the
spline drive coupling.
NOTE
Although you can turn the engine by
applying constant pressure, the idea is to
detect any backlash generated between the
engine and transmission mating splines.
e. As with the power method, a good spline drive
coupling will produce a muffled sound, while a
bad spline drive coupling will produce a
distinctive metallic clanking sound.
c
Semi-
Annual
Transmission/
Engine Spline
Drive
a. The third type of inspection is the visual method.
Studs and nuts
are not
centered
(approximately
1/4 inch) in
flywheel
clearance
holes.
WARNING
Fuel cut-off control at drivers position
must be pulled all the way out to prevent
engine from starting. Personnel could be
injured or killed if engine starts during
this PMCS check.
b. Two people are required to perform the visual
method. One will be inside the vehicle manually
jerking the engine. Meanwhile the second will
be under the vehicle observing the relative
motion between the flywheels clearance holes
and the spline drive rings studs and nuts.
0155 00-171