TM 9-2815-225-34&P
3-39. PISTON, CONNECTING ROD, AND BEARING REPAIR
THIS TASK COVERS:
a. Disassembly
c. Inspection
b. Cleaning
d. Assembly
INITIAL SETUP:
APPLICABLE MODELS
Automotive repairman MOS 63H
All
REFERENCES (TM)
SPECIAL TOOLS
None
Connecting rod bushing driver (15434) ST-1242
Connecting rod checking fixture (15434) ST-
TROUBLESHOOTING REFERENCES
561
Para. 2-8
Connecting rod locating mandrel (15434)
ST-563
EQUIPMENT CONDITION
Piston ring groove gauge (15434) ST-560
Piston, connecting rod, and bearings removed
(para. 3-69).
TEST EQUIPMENT
SPECIAL ENVIRONMENTAL CONDITIONS
None
Work area clean and away from blowing dirt and
dust.
MATERIALS/PARTS
Cloth, crocus (Appendix C, Item 4)
GENERAL SAFETY INSTRUCTIONS
PERSONNEL REQUIRED
LOCATION/ITEM
ACTION
REMARKS
Wear rubber gloves when removing piston pin to prevent burns from boiling water or hot piston.
NOTE
Use this procedure to repair any one of six piston, connecting rod, and bearing assemblies.
Quantities shown in legend are for one piston, connecting rod, and bearing assembly.
a. Disassembly
1.
Two piston pin retaining
Remove from piston (1).
rings (3)
WARNING
Wear rubber gloves when removing piston pin to prevent burns from boiling water or hot
piston. Failure to comply may result in injury to personnel.
CAUTION
To avoid damage to piston, do not use hammer or any other tool to remove piston pin.
2.
Piston pin (2) and
a. Heat piston (1) 210°F (98.9°C)
Use tongs or hook to remove
connecting rod (5)
for 10 minutes in boiling water or
piston from hot water.
oven.
b. Push piston pin (2) from piston
(1) and connecting rod (5) with
3-174
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