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TM 5-4320-308-13
5-3. REPAIR/REPLACE CONNECTING ROD (Continued)
2 Inspect rod bushing for scoring, overheating, or other damage. Replace if damaged.
3 Measure outside diameter of rod bushing. Measurement should be 1. 1042 to 1. 1037 inches (28. 048 to 28.
035 mm). If measurement is outside specified limits, replace rod bushing.
4 Measure inside diameter of connecting rod bushing bore. Measurement should be 1. 1028 to 1. 1024 inches
(28. 013 to 28. 000 mm). If measurement is outside specified limits, replace connecting rod.
CAUTION
Be certain that the numbers on both halves of the connecting rod match.
NOTE
Clean rust preventive from replacement connecting rod. Also make sure bearing bore is
thoroughly cleaned to prevent trapped contaminants from adversely affecting bearings.
5 If required, clamp connecting rod in a padded vise and install new rod bushing (9) into connecting rod bushing
bore.
CAUTION
Be certain that bearing halves are installed correctly. The bottom bearing half (8) has a hole which
fits into lower connecting rod half (6).
1 Carefully insert bearing halves (8) into connecting rod.
CAUTION
Be certain that the numbers on both halves of the connecting rod match. When installing
connecting rod, make sure it does not knock against crankcase. This could result in serious
damage to connecting rod.
2 Install top half of connecting rod (7) on crankshaft.
3 Install bottom half of connecting rod (6) (with dipper opening to dipstick side) and Allen screws (5). Using a
torque wrench and Allen socket, tighten screws to 29. 50 foot-pounds (40 N.m).
4 Lubricate preformed packing (4) with lubricating oil and install into cover (1).
5 Install cover (1) with four caps (2) and Allen screws (3).
5-9
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