PT-8320 LS-8320 Caterpillar 3400 Repair Bushing Alt.

ATC-8320 PT-8320 LS-8320 Caterpillar 3400 Repair Bushing

Specifically designed for Caterpillar 3400 / 3406 / 3408 engine group

This Lower Repair Ring Finished Bore Bushing is an engineered repair insert used to restore the lower repair ring bore in Caterpillar 3400-series engines (including 3406, 3408). It serves as a finished bore, precisely machined bushing that reinstates a uniform, hardened seating surface for lower repair rings when the original bore has been worn, damaged, pitted, or over-machined.

This bushing allows rebuilders to salvage engine blocks by installing a drop-in repair collar rather than replacing the entire casting or performing extensive machining. Because it restores bore concentricity and dimensional control, the insert supports accurate sealing and long life of the lower repair ring.

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