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 TM 55-1905-223-24-5
3-25. Replace/Repair Connecting Rod and Piston Group.
This task covers:
a. Removal
b. Replacement
INITIAL SETUP:
Tools
Equipment Condition
Tool kit, general mechanic's
Oil pan removed (para. 2-44).
rail and marine diesel engines,
Cylinder heads removed (para. 2-41).
Piston ring compressor P/N 3822736
Piston ring expander P/N ST-763
Connecting rod guide pins P/N 3375601
Torque wrench kit P/N 3377216
Piston ring compressor P/N 3375167
Materials/Parts
Lubricating oil, Item 1, Appendix C
Lubriplate 105 or equivalent,
Item 11, Appendix C
Connecting rod P/N 3013930
Engine piston set P/N 3801770
REMOVAL
a. Rotate the crankshaft to position two connecting rods at bottom dead center (BDC) (FIGURE 3-73) .
b. Loosen, but do not remove, the connecting rod capscrews (5, FIGURE 3-74) .
c. Use a rubber hammer to hit the connecting rod capscrews (5) to loosen the cap (6) from the dowel (4)
in the connecting rod (7).
d. Check to see if the connecting rod (7) and the cap ('6) have matching numbers stamped on them and
that they are in the correct cylinder location.
e. Remove the connecting rod capscrews (5) and cap (6).
f. Remove the lower rod bearings (3).
g. Mark the cylinder number and the letter "L" in the flat surface of the bearing tang.
h. Push the rod away from the crankshaft, until piston rings are outside cylinder.
i. Remove the piston and rod assembly.
Change 1
3-113
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