Measure the diameter including the tin. It should measure a minimum of 4.8318 in. (12.27277 cm) and a
maximum of 4.8340 in. (12.27836 cm) Replace damaged parts.
b. Measure the diameter of the seal ring bore. It should measure a minimum of 4.5000 in. (11.4300 cm) and a
maximum of 4.5030 in. (11.43762 cm) Replace damaged parts.
Measure the inside diameter of the piston pin bore. It should be minimum of 1.5025 in. (3.81635 cm) and a
maximum of 1.5035 in. (3.81889 cm) Replace damaged parts.
Inspect the liners (2) for cracks, excessive scoring or flange irregularities. If found, replace the piston liners (2).
Inspect the liners (2) for poor contact on the outer surfaces.
Fretting is a build-up of block material on the outside surface of the liner from movement of the liner
in the block during operation.
a. Check the outside diameter for fretting below the ports. If found, a coarse stone or file may be used to remove
Compound may cause irritation to eyes or skin. In case compound comes in contact with eyes or
skin, immediately flush eyes with water, wash skin with soap and water. Wear protective goggles,
gloves, and clothing. Failure to comply may result in personnel injury or death.
Check the outside diameter of liners (2) for corrosion. If found, a wire brush and cleaner HA-777 can be used
to remove the corrosion.
END OF TASK
HONE THE CYLINDER LINER
Hone old cylinder liners before reuse. Failure to comply will result in damage to pistons, piston
rings or increased time to seat the piston rings.
The engine will need to be completely disassembled and thoroughly cleaned after honing.
Failure to comply may result in damage to engine.
If a new cylinder liner is to be used, do not hone the new liner if it has a factory honed surface
Secure the liners (2) in a suitable fixture.