7040 Piston Ring Compressor Tool Adapter Anti-Polishing Ring for Cummins ISX/QSX 15, Compatible with Caterpillar 3400 C-15 5.4" Bore - Replaces PT-7040 5394454 5299448 5299447 5299339

7040 Piston Ring Compressor Tool

• 【All-in-One Engine Rebuilding Set for Cummins and Caterpillar Engines】 This 7040 Piston Ring Compressor Tool combines a compressor body, adapter ring, and anti-polishing ring into one set. Designed specifically for Cummins ISX/QSX engines and compatible with Caterpillar 3406 C-15 5.4-inch bore engines, the set supports professional-grade compression results and faster installation during heavy-duty engine repairs.
• 【Direct Solution for Ring Binding and Misalignment】 Uneven compression or poor fit often leads to ring binding and misalignment during piston ring installation. This set includes a smooth-action compressor, a dedicated deep-bore adapter, and an anti-polishing ring that helps reduce cylinder wall glazing. The design lowers the risk of ring misalignment and promotes a more consistent seal for Cummins ISX and compatible Caterpillar 5.4-inch bore engines.
• 【Hardened Steel Construction with Corrosion-Resistant Coating】 The tool is made of high-grade hardened steel and finished with a black corrosion-resistant coating. The set includes a compressor body fitting 4.40- to 5.40-inch bores, an adapter ring, an anti-polishing ring, and a storage case. It replaces OEM numbers PT-7040, 5299448, 5299447, and 5299339.
• 【Practical for Diesel Mechanics and DIY Engine Work】 This tool set suits DIY mechanics, diesel technicians, and shop owners working on heavy-duty engine repairs. It performs reliably in professional garages and home workshops for in-frame overhauls, complete engine rebuilds, or cylinder kit replacements on engines compatible with Cummins ISX/QSX and Caterpillar 3400 series & C-15.
• 【Easy Cleaning and One-Year Warranty】After use, the tool can be wiped clean of oil and stored directly. The set comes with a 1-year warranty,