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TM 5-4320-308-13
5-3. REPAIR/REPLACE CONNECTING ROD (Continued)
7 Disassemble connecting rod and carefully insert bearing halves (8). The bottom half has a hole which fits into
connecting rod cup. Reassemble connecting rod with two Allen screws. Tighten screws following procedures
described in preceding step 5.
8 Measure inside diameter of bearing. Measure at points 1 and 2
along axes A and B. Measurements should be 1. 6541 to 1. 6525
inches (42.016 to 41. 974 mm).
9 If any measurement is outside the tolerance limits, replace the
bearing. Make sure that measurements at points 1 and 2 are not
different nor outside the tolerance limits, indicating that bearing is
wearing in a conical shape.
10 Make sure measurements along axes A and B are not different nor
outside the tolerance limits, indicating the bearing is wearing in an oval shape.
11 If bearing is out-of-round, replace it. Follow procedure described in paragraph 5-7. Also check cylinder and
piston for unusual wear. Follow procedures described in paragraphs 4-18 and 4-19.
REPAIR:
WARNING
Dry cleaning solvent P-D-680 (safety or Stoddard's Solvent) is
potentially dangerous. Avoid repeated and prolonged breathing
of vapors and skin contact with the liquid. Do not use near open
flame, arcing equipment, or other ignition sources. Always wear
eye protection and protective clothing. The flash point of P-D-
680 is 100° to 138°F (38° to 59°C).
Death or serious injury could occur if compressed air is directed
against the skin. Do not use compressed air for cleaning or
drying unless the pressure is/has been reduced to 30 psi (2. 06
bar) or less. When working with compressed air, always use chip
guards, eye protection, and other personal protective equipment.
1 Clean rod bushing (9) and connecting rod (7) bore with dry cleaning solvent
and dry with compressed air.
5-8
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