C5255204 (5255204) is a core front-end transmission component for Cummins ISDE/ISBE/QSB series engines, also known as crankshaft belt pulley. It transfers crankshaft power to accessories such as generators, water pumps, and steering pumps, and integrates a signal gear ring to provide speed and position signals for the engine electronic control system. Made of high-strength gray cast iron or cast steel through precision casting, CNC machining and dynamic balance treatment, it has a stable structure and precise transmission, suitable for harsh working conditions of construction machinery and commercial vehicles, and is a key basic component of the engine accessory drive system.
Technical Parameters
- Part Number: C5255204 (5255204)
- Brand: DCEC Cummins
- Type: Crankshaft Pulley (Integrated Signal Gear Ring)
- Compatible Engine: Cummins ISDE, ISBE, QSB4.5/6.7 series diesel engines
- Material: High-strength cast iron/cast steel, with aging treatment and precision machining, good strength and wear resistance
- Structure: Multi-groove pulley design, with built-in high-precision signal gear ring, central hole and keyway for precise positioning, dynamic balance grade G2.5
- Key Dimensions: Outer diameter approx. 220mm, 6 belt grooves, central hole diameter φ45mm, keyway 12mm×8mm (subject to original factory drawings)
- Surface Treatment: Phosphating/electrophoretic anti-rust, oil resistance and high temperature resistance, suitable for -40℃~120℃ working environment of engine compartment
- Installation Method: Key connection + bolt fastening, torque 80~95N·m. Clean interface impurities before installation
- Cross Reference: 3954949, 5365943 (interchangeable, compatible with the same series of engines)
- Weight: Approx. 3.2kg per piece
- Applicable Position: Front end of engine crankshaft, located at the integrated position of pulley and signal wheel
Application Scenarios
Designed specifically for Cummins ISDE/ISBE/QSB series engines, covering full-scenario operation of construction machinery and commercial vehicles:
- Compatible Equipment: Loaders, excavators, graders of XCMG, SANY, LG and other brands, as well as light/medium trucks and buses with Cummins power
- Construction Machinery Working Conditions: Suitable for mine, infrastructure, farmland renovation and other scenarios, resistant to high temperature, high humidity, dust and continuous heavy load environment, stable transmission without slipping
- Core Functions: Transfer power to accessories such as generators, water pumps and air conditioning compressors to ensure the operation of engine accessory systems; provide accurate speed/position signals to support precise fuel injection and ignition of the electronic control system, improve engine operation stability and fuel economy
- Installation Position: Outside the front cylinder block of the engine, matched with the front end of the crankshaft, driving various accessories through belts without interfering with other moving parts