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 TM 10-3930-660-24-2
CONNECTING RODS AND BEARINGS MAINTENANCE - CONTINUED
0277 00
INSPECTION
1.
Visually inspect connecting rods (6) for damage or obvious wear.
2.
Check I-beam section (9) of connecting rods (6) for dents or other damage. Any damage in this area can cause stress
which will lead to breakage.
3.
Measure I.D. of piston pin bore in connecting rod (6), at four points as shown, to check for wear. Take average of all
readings. Average reading must not exceed range from 1.5769 to 1.5784 in. (40.0532 to 40.0913 mm).
6
6
9
409-997
409-996
4.
Assemble connecting rod (6), rod bearings (5) and rod bearing cap (2).
5.
Install new capscrews (4) and tighten to 73 lb-ft (99 Nm).
6.
Record smallest diameter measured at various points around bore.
7.
Measure and record mean diameter of rod journal on crankshaft (10). Take four readings on each journal at points noted.
8.
Subtract rod journal mean diameter, step 8, from smallest rod bearing diameter, step 6, to determine rod bearing clear-
ance.
NOTE
Maximum allowable rod bearing clearance is 0.0035 in. (0.0889 mm). Select required undersized bearing set
to compensate for excessive rod bearing clearance.
4
2
4
5
10
6
409-998
409-999
0277 00-4
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