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 TM5-241O-237-34
3-11.
CRANKSHAFT BEARINGS - REPLACE
This task covers:
a. Removal
b. Cleaning
c. Inspection
d. Installation
e. Place In Service
INITIAL SETUP
Applicable Configurations
Materials
All-
Plastigage
Lubricating Oil OE/HDO-30 (Refer
Common Tools
to LO5-241O-237-12)
Shop Equipment, General Purpose
Cleaning Solvent (App. B, Item 18)
Repair, Semi-Trailer Mounted
Lint-free Rags
NSN 4940-00-287-4894
Shop Equipment, Machine Shop:
Equipment Condition
Field Maintenance, Basic
Engine oilpan plate removed. See
NSN 3470-00-754-0708
Bearing Removal/Installation
Engine oil pump removed. See
Tool
NSN 5120-01-124-1906
a. Removal
NOTE
Identify main bearings with
the same number that is on the
bearing cap. When used
bearings are reinstalled, each
bearing must be installed in
its original location because
the bearing surfaces have worn
to the crankshaft journals.
(1) Use a wrench to remove capscrews
(1) and washers (2). Remove
bearing caps (3) from cylinder
block (4) for main bearings 1,
3, 5, and 7 ONLY. DO NOT
REMOVE BEARING CAPS FROM
POSITIONS 2, 4, AND 6 MAIN
BEARINGS AT THIS TIME. Remove
lower half of main bearings (5)
from bearing caps (3).
3-51
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