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TM 5-2420-222-34
3-8.
CRANKSHAFT MAINTENANCE (Con’t).
Table 3-1. Main Bearing and Journal Dimensions.
Connecting Rod Journal
Main Bearing Journal
Bearing Size In Inches (mm)
Diameter In Inches (mm)
Diameter In Inches (mm)
Standard
2.7480-2.7490
3.1230-3.1240
(69.7792-69.8246)
(79.3242-79.3496)
0.002 (0.0508)
2.7480-2.7490
3.1230-3.1240
Undersize
(69.7992-69.8246)
(79.3242-79.3496)
0.010 (0.254)
2.7470-2.7480
3.1220-3.1230
Undersize
(69.7738-69.7992)
(79.2988-79.3242)
0.020 (0.508)
2.7460-2.7470
3.1210-3.1220
Undersize
(69.7484-69.7738)
(79.2734-79.2988)
0.030 (0.762)
2.7450-2.7460
3.1200-3.1210
Undersize
(69.7230-69.7484)
(79.2480-79.2734)
CAUTION
Ensure that connecting rod bearing cap is installed on same connecting rod from
which it was removed. Failure to do this may cause Incorrect inside diameter
measurement and damage to parts.
21.
Slide upper sleeve bearing half (10) into position on connecting rod (11). Ensure that tang on upper sleeve
bearing half fits in locking groove in connecting rod.
22.
Slide lower sleeve bearing half (4) into position in connecting rod bearing cap (5). Ensure that stampings line up
as noted during removal.
23.
Position connecting rod bearing cap (5) and assembled lower sleeve bearing half (4) in place on connecting rod
(11).
24.
Coat threads of two bolts (7) with engine oil. Install two bolts and washers (6) in connecting rod bearing cap (5)
and connecting rod (11). Torque bolts to 65 lb.-ft. (88 N.m).
25.
Using rod measuring kit, measure inside diameter of upper and lower sleeve bearing halves (10 and 4). Diameter
must be 2.7502-2.7522 in. (69.8551-69.9059 mm).
26.
Subtract largest measurement for connecting rod bearing journal taken in step 7 from measurement taken in step
25. Difference is clearance.
NOTE
If one connecting rod bearing Is replaced, all connecting rod bearings must be
replaced.
27.
Clearance must be 0.0012-0.0062 in. (0.0305-0.1575 mm). If clearance is not within specification and mating
Journal is within specification, replace upper and lower sleeve bearing halves (10 and 4) in accordance with Table
3-1.
3-52
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