Cummins engine spare parts Water Pump core repair kit C5680293

Designed as a complete repair package for water pump core failures, this kit integrates 18 critical components to address common wear issues. The core parts include a high-strength alloy steel shaft (42CrMo), a precision-cast aluminum impeller, a double-row sealed bearing, a silicon carbide/carbon mechanical seal, and a set of HNBR rubber gaskets/O-rings. It also features auxiliary items: a shaft key, lock nuts, and anti-seize lubricant—eliminating the hassle of sourcing individual parts. This all-in-one design reduces repair setup time by 65% compared to piecemeal purchases, allowing technicians to complete a full pump core overhaul in 4 hours, down from 10 hours with scattered components

Each component in the kit uses Cummins-approved premium materials to match the original pump’s lifespan and performance. The main shaft undergoes quenching and tempering treatment, achieving HRC 52-55 surface hardness and 900MPa tensile strength to resist bending and wear. The impeller is crafted from heat-resistant A380 aluminum alloy, with precision-machined vanes to maintain 150L/min coolant flow rate. The mechanical seal combines silicon carbide (stationary ring) and carbon (rotating ring) for exceptional wear resistance, while the bearing uses high-temperature fluoroelastomer seals to withstand 135℃ operating temperatures. These materials ensure the repaired pump delivers a service life of ≥250,000km, identical to a new OE pump

All parts in the kit undergo ultra-precision machining to guarantee optimal performance after repair. The shaft features a polished surface (Ra ≤0.1μm) and strict runout tolerance (≤0.02mm) to prevent bearing wear and seal leakage. The impeller’s vanes are CNC-machined with a 45° pitch angle, ensuring consistent coolant flow and minimizing hydraulic resistance. The mechanical seal’s mating surfaces are lapped to a flatness of ≤0.005mm, achieving a leakage rate of ≤0.008g/h—far below industry standards. The gasket set includes pre-formed seals with precise compression ratios, eliminating the risk of coolant leaks that cause engine overheating or corrosion. This precision restores the pump’s cooling efficiency to 100% of factory levels

The C5680293 repair kit offers significant cost advantages over replacing the entire water pump, reducing repair expenses by 70% (from $800 for a new pump to $240 for the kit). Its user-friendly design includes clear labeling for each component and a detailed instruction manual with torque specifications (e.g., 25N·m for lock nuts) and installation steps, making it accessible even for novice technicians. The kit’s compatibility with original pump housings reduces waste by reusing viable components, aligning with sustainable maintenance practices. By restoring pump performance, it prevents overheating-related engine damage (costing up to $5,000) and unplanned downtime. Backed by a 1-year Cummins warranty, the kit provides reliable, cost-effective support for fleet and construction equipment maintenance