C4983253 XCMG GR2605 motor grader bushing

C4983253 (4983253) is a specialized bushing designed for Cummins ISB, ISDe, and QSB series engines. It serves as a critical wear-resistant component within the engine’s transmission and suspension systems, also known as a sleeve bearing or sliding bushing. Precision-machined from tin bronze (ZCuSn10Pb1) and featuring a polished surface finish, it exhibits exceptional wear resistance, low friction properties, and impact resistance. Its primary function is to minimize frictional wear between shaft components and bore components; furthermore, it positions and supports shaft rotation, absorbs vibrations, compensates for assembly deviations, and prevents component wear and seizing—thereby ensuring the smooth and flexible operation of the engine’s associated transmission mechanisms. Suitable for demanding operating conditions—including heavy-duty loads and high-frequency reciprocating motions—it offers ease of installation and a long service life.

Technical Specifications

– Part Number: C4983253 (4983253)
– Brand: Dongfeng Cummins (DCEC)
– Type: Engine Bushing (Sliding Bushing / Sleeve Bearing)
– Material: Tin Bronze (ZCuSn10Pb1); select specifications available in Brass Alloy
– Compatible Engines: Cummins ISB6.7, ISDe4.5, ISDe6.7, QSB6.7, and B5.9 Series
– Structure: Cylindrical hollow structure with a smooth inner wall and no oil grooves (select specifications feature lubrication grooves); includes locating shoulders at both ends
– Key Dimensions: Outer Diameter φ35mm, Inner Diameter φ28mm, Length 42mm (sized to fit corresponding shaft and bore dimensions)
– Surface Treatment: Polished inner wall; phosphating anti-rust treatment applied to the exterior surface to reduce the coefficient of friction
– Installation Method: Interference fit (press-fit); grease may be applied during installation for enhanced lubrication
– Alternative Models: 3926803, 4932298, 3900957 (Fully interchangeable)
– Weight: Approx. 0.12 kg/unit
– Application Areas: Shaft-to-bore interface points within engine connecting rods, rocker arms, brackets, drive shafts, etc.

Application Scenarios

Primarily designed for Cummins series engines installed in Dongfeng commercial vehicles and heavy-duty construction machinery. As a critical wear-resistant component for shaft-to-bore interfaces, it is widely utilized in various heavy-load and high-frequency motion operating conditions:

– Dongfeng Vehicle Models: Tianlong, Tianjin, Hercules, Auman, and other medium-to-heavy-duty trucks and buses equipped with ISDe/ISB/QSB series engines
– Construction Machinery: 18–26 ton wheel loaders, graders, bulldozers, and excavators (equipped with QSB6.7 or B5.9 engines); as well as forklifts, cranes, and other heavy equipment
– Operating Conditions: Harsh environments involving long-distance heavy hauling, mining sites, high-altitude/extreme-cold regions, high-temperature/high-humidity climates, frequent start-stop cycles, and high-frequency reciprocating motion – Installation Locations: The small end of the engine connecting rod, rocker arm shaft bores, bracket bores, transmission shaft support areas, and other mating interfaces between shaft-type and bore-type components; utilized for friction reduction, positioning, and support.
– Core Functions: Minimizes frictional wear between shafts and bores; supports the stable operation of shaft components; absorbs vibrations; compensates for assembly tolerances; prevents component seizing and abrasion; and extends the service life of related engine components.