TM 9-2320-260-34-1
3-47. PISTON AND CONNECTING ROD MAINTENANCE
THIS TASK COVERS:
a. Removal
b. Disassembly
INITIAL SETUP
APPLICABLE MODELS
MATERIALS/PARTS
All
Emery cloth (Appendix C, Item 8)
TOOLS
REFERENCES (TM)
TM 9-2320-260-34P-1
General mechanic's tool kit
(Appendix B, Item 1)
EQUIPMENT CONDITION
Arbor press (Appendix B, Item 7)
Oil pan removed (para. 3-46).
Wire brush (Appendix B, Item 107)
Cylinder heads removed (para. 3-40).
Piston ring expander (Appendix B, Item 114)
NOTE
Clean all carbon from upper inside wall of each cylinder liner
with wire brush and emery cloth before removing connecting
rods and pistons.
Connecting rods and pistons are removed the same. This task
covers the removal of one connecting rod and piston.
1.
Remove two screws ( 12) and connecting rod cap (11) from connecting rod (6) and crankshaft
journal (9).
CAUTION
Connecting rod caps are not interchangeable. Reassemble each
connecting rod cap and connecting rod after disassembly. Tape
connecting rod bearing shells together and label each pair by
cylinder number for installation.
2. Remove bearing shell (10) from connecting rod cap (11).
3. Push connecting rod (6) and piston (2) from cylinder block (13) using hammer handle. Hold piston (2)
to prevent damage from falling during removal.
4. Remove bearing shell (8) from connecting rod (6).
NOTE
Mark connecting rods, caps, and pistons with appropriate cylinder
number. Mark side of connecting rod and cap facing camshaft.
b. Disassembly
1. Remove piston rings (1) from piston (2). Discard piston rings (1).
2. Remove two retaining rings (3) from piston (2).
3. Using arbor press, remove piston pin (4) from piston (2) and connecting rod (6).
4. Using arbor press, remove piston pin bushing (5) from connecting rod (6). Discard piston pin
bushing (5).
5. Remove alinement pin (7) from connecting rod (6).
