Cummins 6.250″ Bore Piston Ring Compressor.


1 in stock


Caterpillar 7M3977 Piston Ring Compressor 5.4″ Very Good Condition. Machine Shop machined from K series liner. We used this tool to rebuild  between 15-18 Cummins KT, C19 Engines and Never had any issues !  Tool is heavenly coated with grease.

Additional information

Weight 10 lbs
Dimensions 13.625 × 3.375 × 11.875 in