The ATC-7115 Piston Ring Compressor is a heavy-duty, precision-machined installation tool engineered for use on Caterpillar C9.3 diesel engines with 115 mm cylinder bores. Designed as a direct alternative to the OEM CAT 5P-3524 compressor, this tool ensures smooth, damage-free piston and ring installation during in-frame or out-of-frame engine service. MADE IN USA
Built for professional rebuild shops, fleet maintenance operations, and diesel engine technicians, the ATC-7115 delivers consistent clamping force to properly compress piston rings—preventing ring breakage, scuffing, or bore damage. Its robust, shop-grade construction and precise internal taper guide the piston cleanly into the liner, supporting OEM-spec performance and long-term engine reliability.
Whether replacing pistons, performing a major overhaul, or refreshing a workhorse C9.3 power unit, this tool provides the accuracy and durability required for high-volume diesel service environments.
Key Features & Benefits
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Designed specifically for CAT C9.3 engines with 115 mm bore.
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Direct functional replacement for Caterpillar 5P-3524 ring compressor.
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Ensures uniform ring compression and safe piston insertion without distortion or ring damage.
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Heavy-duty steel construction suitable for repeated shop use.
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Essential for engine rebuilds, liner replacement, piston service, and full overhauls.
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Supports OEM-level installation accuracy to maintain compression, sealing, and engine longevity.