ARMY TM 9-6115-670-14&P
6-66
6.26. CRANKSHAFT.
This task covers: a. Test
b. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Dial Indicator
(Item 36, Appendix B)
Equipment Conditions
Bearing case cover removed (para 6.25.).
Piston removed (para 6.22.).
Materials/Parts
Crankshaft
Bearing Case Gasket
(Item 19, Appendix J)
TEST
a. Test end clearance.
(1) Set tip of dial indicator on the end of the crankshaft.
(2) Measure end clearance by moving the crankshaft front and rear. Side clearance should be
between 0.0059 and 0.0122 in. (0.15 and 0.31 mm).
(3) If end clearance exceeds 0.020 in. (0.5 mm), replace thrust bearing (perform steps c and
e of REPLACE). Refer to Appendix C and replace with an oversize bearing if necessary.
b. Test alignment.
(1) Remove crankshaft from engine (perform steps a - d of REPLACE).
(2) Support the crankshaft on suitable supports.
(3) Place tip of dial indicator at a right angle on middle journal.
(4) Check for misalignment by rotating crankshaft. If misalignment exceeds 0.0008 in. (0.02
mm), replace crankshaft.
NOTE
When performing this procedure, check camshaft
bearing (para 6.28. and/or 6.29.).
