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 TM 9-2815-220-24
CONNECTING ROD ASSEMBLY REPAIR
0143 00
INSPECTION (Continued)
7. Inspect connecting rod (1) bearings (5, 7).
a. Visually inspect connecting rod bearing halves (5).
BASIS FOR BEARING REJECTION
ACCEPTABLE BEARING FLAWS
Separation of bearing metal, or signs of possible Fine scratches on bearing surface.
separation.
Minute pieces of metal and dirt particles
Pieces of metal or dirt particles embedded in
embedded in bearing surface with a
bearing surface with a concentration of
concentration of less than 5 per cent. (Do not
5 per cent or more of the surface area.
attempt to remove such particles.)
Pitting or any other form of destruction to
bearing surface.
Raised metal at edges of scratches.
b. Apply a thin coating of Prussian blue (item 25, WP 0173) to the backs of the connecting
rod bearing halves (5) to check contact area (after dimensional check).
c. Install bearing halves (5) in their respective connecting rods (1) and caps (4) according to
the location markings.
d. Apply lubricant (item 23, WP 0173) to rod bolt (8) threads and nut (3) seat.
e. Assemble rod (1) and cap (4) and torque-tighten progressively, first to 100-150 inch-
pounds, then to 600-650 inch-pounds (50-54 foot-pounds, or 68-73 Nm), and finally to
1250-1300 inch-pounds (104-108 foot-pounds, or 141-147 Nm).
4
3
5
5
8
1
WP 0143 00-6
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