TM 5-3805-281-24-2
Crankshaft, Main Bearings, and Flywheel
REMOVE AND CLEAN PISTON COOLING
ORIFICES
1. Remove all six (four shown) piston cooling orifices (A)
and inspect each cooling orifice to make sure it is not
plugged or damaged.
2. Use a soft wire and compressed air to clean orifice.
Replace if condition is questionable.
IMPORTANT: A piston cooling orifice failure could
cause damage to pistons, piston pins,
Piston Cooling Orifices in Block
rod pin bushings, and liners. If a piston
cooling orifice is left out, low or no oil
pressure will result.
3. Install orifices and tighten to 11 Nm (97 lb-in.).
RG,RG34710,1180
1923OCT971/1