The ATC 7450 Ring Compressor is a precision clamshell ring compressor engineered specifically for installing piston rings in Cummins ISC, ISC 8.3, ISL, and ISL9 engines with a 4.480″ bore. It also fits the Caterpillar 3208.
Say goodbye to fiddly spring-type compressors — the robust, USA-made clamshell design streamlines ring installation and ensures full, even compression for safe insertion.
Key Features & Benefits
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Exact fit for 4.480" bore used in Cummins ISC / ISL engines
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Clamshell design eliminates the hassle and risk of traditional spring compressors
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Simple open/close mechanism ensures consistent ring compression
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Reduces the chance of ring breakage or scuffing during installation
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Heavy-duty construction, built for shop and field use
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Made and Cast in USA
Usage Tips & Notes
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Confirm your engine bore matches 4.480" before selecting this tool.
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Ensure rings are clean, oriented correctly (gap positions), and oiled prior to compression.
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Tighten and seat the ring compressor snug around the piston until pin can be inserted, then gently insert into the bore.
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Always keep even pressure and alignment during insertion to prevent binding or damage.
The ATC 7450 offers mechanics and rebuilders a dependable and more efficient way to install piston rings on these Cummins and Cat engines.