CAT piston pin 197-9327 plays a core connecting role in the engine power transmission system. It transmits gas pressure borne by the piston to the connecting rod to drive the crankshaft rotation, and its precision and strength directly affect engine operation stability. Made of high-carbon steel or alloy steel through forging, its surface is carburized and quenched, with hardness reaching HRc58-62, featuring excellent wear resistance while maintaining core toughness to avoid impact fracture.
The piston pin undergoes precision grinding, with outer diameter tolerance controlled within ±0.002mm and cylindricity ≤0.001mm. The fit clearance with piston pin hole and connecting rod small end is precise, reducing operating noise and wear. It is compatible with CAT 320D, 336D, C9, C13 and other series engines, with operating temperature range -40℃ to 300℃, and can withstand impact load above 150MPa, adapting to heavy-duty operating environments.
Original piston pins strictly follow CAT manufacturing specifications, with raw material purity and processing technology fully matching the original system, suitable for scenarios with extremely high requirements for power transmission precision; Aftermarket piston pins pass 100,000 fatigue tests, with key dimensions and hardness up to standard, priced at 60%-70% of the original, meeting replacement needs of budget-conscious customers.
As a professional supplier, Ningbo Qiuning Trading Co., Ltd. provides material testing and dimension inspection reports for each batch of products, with inventory covering mainstream models, supporting global delivery within 72 hours, and offering guidance on installation fit clearance. Welcome to consult and purchase according to actual needs:
WeChat/WhatsApp：+8615888032469
The Caterpillar original parts categories sold by our company also include:
① Engine components: turbocharger, generator, starter motor, water pump, oil pump, four matching parts, engine assembly, oil pump and nozzle;
② Chassis components (four-wheel belt): tensioning cylinder, tensioning spring, guide wheel, drive teeth, supporting wheel, idler wheel, chain rail/chain, track plate, and loose link chain;
③ Hydraulic components: hydraulic pump, rotary motor, solenoid valve, walking balance valve, central rotary joint, hydraulic cylinder;
④ Electrical components: sensors, wiring harnesses, complete machine computer board ECM, display screen, engine computer version ECM;
⑤ Maintenance parts: filter element, engine oil, hydraulic oil, butter;
⑥ Radiators: water tank, hydraulic oil radiator, intercooler;
⑦ Cabin air conditioning: compressor, air conditioning panel, warm air tank, condenser, cabin assembly;
⑧ Rotary bearings, bearings, and pin shafts.
⑨ Disassembled parts: reducer, hydraulic pump, motor, cylinder head, cylinder block, crankshaft, display, engine computer board ECM, complete machine computer board ECM.
⑩ Engine overhaul, complete machine harness replacement, hydraulic pump overhaul.
