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TM 10-3930-638-24&P
4-2. ENGINE MAINTENANCE (cont)
d. Crankshaft and Main Bearings.
This task covers:
a. Removal
b. Cleaning
INITIAL SETUP
TOOLS
Gear and Bearing Heater
Dial Indicator
Plasti Gage
Micrometer, zero to five inches
Universal Gear Puller
No. 1 Common Organiza-
tional Maintenance Tool Kit
Bore Cage, zero to 5 inches
MATERIALS/PARTS
c. Inspection
d. Installation
EQUIPMENT CONDITION
Paragraph
Condition Description
3-5k
Oil pan removed.
3-5g
Cylinder head assembly removed.
4-2h
Timing gear cover removed.
NSN 5120-00-3784293
4-2i
Oil pump removed.
NSN 4910-00-754-0654
4-2e
Flywheel and flywheel housing removed.
4-2
Crankshaft oil seal retainer removed.
Cleaning solvent P-D-680
Asbestos gloves
Clean cloths
Oil, No. 30
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
1
Cylinder
a. Eight connecting
Remove
block
rod nuts (1)
NOTE
Bearing liners are locked in groove of connecting rod bearing cap.
Remove with cap as an assembly.
b. Four connecting
Check, remove,
Check that cap (2) and connecting rods are
rod bearing
and set aside
numbered as to location in block. Number
caps (2)
cap and rod if necessary
c. 10 cap screws (3)
Remove
NOTE
Main bearing liners are locked in groove of main
bearing caps. Remove with cap as an assembly.
Check that main bearing caps are numbered for
location in cylinder
d. Front main bearing
cap (4)
e. Two intermediate
block. If necessary, number,
Remove and
set aside
Remove and
main bearing caps (5) set aside
Change
1
4-25
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