TM 5-4310-386-14
5-44. Engine Connecting Rod (Cont).
b.
Repair. (figure 5-67)
(1)
Remove connecting rod (para. a. above).
WARNING
Dry cleaning solvent PD-680 used to clean parts is potentially dangerous to personnel and
property. Avoid repeated and prolonged skin contact. Do not use near open flame or excessive
heat. Flash point of solvent is 138°F (60°C).
(2)
Clean all items with dry cleaning solvent, and dry thoroughly.
(3)
Inspect bushing (1) and bearing shell (2) for excessive wear or damage.
(4)
Measure inside diameter of piston pin bushing (1) (small end of connecting rod) with inside
micrometer. Measure at points 1 and 2 in planes a and b. Should measure maximum 1.3835 inches
(35.19 mm). If measurement is greater than specified, replace bushing.
(5)
Pull out piston pin bushing (1) with fixture.
(6)
Pull in piston pin bushing with same fixture making sure oil bores in bushing and connecting rod are
perfectly aligned.
(7)
Position big-end bearing cap (2) on connecting rod (3) making sure they bear same identification
number.
(8)
Install two bolts (4) and tighten per Appendix F.
(9)
Measure inside diameter of big-end bore at points 1 and 2 in planes a and b using inside micrometer.
(10)
If measurement is less than 2.3047 inches (58.539 mm) replace connecting rod (3) and big-end caps
(2).
NOTE
The big-end bearings are available in six sizes (in increments of .0098 inches (0.25 mm) and
cannot be reconditioned.
(11)
If measurement is between 2.3046 to 2.3538 inches (58.539 to 59.789 mm) install new big-end
bearings.
(12)
Remove bearing cap, install new big-end bearings and retighten per Appendix F.
(13)
Remeasure inside diameter of big-end bore with inside micrometer. Should measure not greater than
2.3637 inches (60. 039 mm).
(14)
Remove big-end caps and bearings.
5-186
