TM 5-3895-346-14
ENGINE OVERHAUL
CONNECTING ROD BEARINGS
CAUTION
Bearing shells are NOT rework- able from one undersize to another under any
circumstances.
Install Connecting Rod Bearing Shells
With the crankshaft and the piston and connecting rod assembly in place, in- stall the connecting rod bearings
as follows:
1.
Rotate the crankshaft until the connecting rod journal is at the bottom of its travel, then wipe the
journal clean and lubricate it with clean engine oil.
2.
Install the upper bearing shell (the one with the short groove and oil hole at each parting line) in the
connecting rod. Be sure the tang on the bearing shell fits in the groove in the connecting rod.
3.
Pull the piston and rod assembly down until the upper rod bearing seats firmly on the crankshaft
journal.
4.
Note the numbers stamped on the connecting rod and the bearing cap and install the lower bearing
shell (the one with the continuous oil groove) in the bearing cap, with the tang on the bearing shell
in the groove in the bearing cap.
5.
Install the bearing and cap and tighten the nuts on the 3/8-24 bolts to 40-45 lb ft (54-61 Nm) torque.
CAUTION
Be sure the connecting rod bolt has not turned in the connecting rod before the
torque is applied to the nut.
6.
Install the lubricating oil pump inlet tube assembly. Replace the inlet tube seal ring or elbow gasket
if hardened or broken.
7.
Install the oil pan using a new gasket.
8.
Refer to the Lubricating Oil Specifications and fill the crankcase to the proper level on the dipstick.
9.
If new bearings were installed, operate the engine on the run-in schedule as outlined in Run-In
Instructions.
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