ARMY TM 9-6115-670-14&P
6-74
6.29. CRANKSHAFT BEARINGS 2 AND 3.
This task covers: a. Test
b. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Equipment Conditions
Crankshaft bearing case 2 and 3 removed from
crankshaft (para 6.26.).
Materials/Parts
Gage, Bearing Clearance (Plastigage)
(Item 6, Appendix F)
Crankshaft Bearing 2
Crankshaft Bearing 3
TEST
a. Place a strip of Plastigage on center of crankshaft journal.
b. Install the bearing case assembly and secure with one bolt (para 6.25.). Torque between 9.4
and 11.6 ft-lbs (12.75Nm and 15.7Nm).
c. Remove bearing case (para 6.25.) and measure oil clearance by measuring amount of
Plastigage strip flattening. Oil clearance should be between 0.00134 and 0.00362 in. (0.034
and 0.092 mm).
d. If oil clearance exceeds 0.0079 in. (0.20 mm), replace bearing. Refer to Table 6-3 and
Appendix C and replace with undersize bearing if necessary.
Table 6-3. Undersize Crankshaft Bearings 2 and 3
Crankshaft Journal 2 OD
Crankshaft Journal 3 OD
Crankshaft Bearing
1.56433 to 1.56496 in.
(39.734 to 39.750 mm)
1.55646 to 1.55709 in.
(39.534 to 39.550 mm)
1.72181 to 1.72244 in.
(43.734 to 43.750 mm)
1.71394 to 1.71457 in.
(93.534 to 43.550 mm)
0.008 in.
(0.2 mm)
0.016 in.
(0.4 mm)
NOTE
Do not move crankshaft while securing bearing case
assembly.
