TM10-4320-315-24
4-9.
MAINTENANCE OF CONNECTING RODS
This task covers:
a.
Remove
c.
Install
b.
Inspect
INITIAL SETUP:
Tools
Equipment Conditions
General Mechanics Tool Kit
Pistons removed (para. 4-6).
(Item 1, Appendix B)
Oil pan removed (para. 4-7).
Angle-of-Turn Indicator
(Item 4, Appendix B)
Inside and Outside Micrometer
(Item 3, Appendix B)
Bushing Insert Device Fixture
(Item 11, Appendix B)
Materials/Parts
Oil, Lubricating
(Item 10, Appendix C)
a.
REMOVE. (Figure 4-11)
(1)
Remove connecting rod capscrews (1).
CAUTION
Connecting rod, caps, and bearing shells are matched and must not be mixed. Bearings could
be damaged.
(2)
Remove rod caps (2) with bearing shells (3). Tag caps and bearing shells.
(3)
Remove and tag connecting rod (4) and bearing shells (5).
b.
INSPFCT.
(1)
Check connecting rod for straightness and visible damage. Replace defective connecting rod.
(2)
Using micrometer, measure inside diameter of piston pin bushing at points 1 and 2 in the planes of a
and b. Correct measurement is 1.577-1.579 in. (40.040-40.084 mm).
(3)
Remove any worn bushing (6, Figure 4-11) and press in new bushing. Make sure oil holes are aligned.
(4)
Install rod cap (2) on connecting rod (4).
(5)
Install connecting rod capscrews (1). Torque screws to 22 ft • lbs (29.8 N•m).
(6)
Using angle-of-turn indicator, tighten rod capscrews 30°, then 60°.
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