C3949326 XCMG GR2605 motor grader positioning ring

C3949326 is an original equipment manufacturer (OEM) locating ring/spacer for Cummins engines. A precision positioning connector used inside the engine, it is typically machined from high-strength metal with tight dimensional tolerances. It ensures coaxiality, installation accuracy, and relative positional stability of related components during assembly and operation. Prevents displacement, deflection, and subsequent abnormal noise, seal failure, or functional faults, making it a key auxiliary part for maintaining assembly precision and reliable long-term engine performance.

Part Number: C3949326 (often abbreviated as 3949326)
Product Type: Locating Ring / Locating Pin / Retaining Ring
Material: High-strength metal (wear-resistant, fatigue-resistant, subject to original equipment standards)
Core Function: Precise positioning and limiting of gears, shafts, accessory drive components, etc.
Application Fitment: Compatible with various Cummins engine series, commonly used in gear chambers, front crankshaft positions, steering wheel shafts, and other assembly points
Superseded Part Numbers: No authoritative public replacement records (refer to the latest Cummins parts catalog for replacements)
Weight: Approx. 0.01-0.05kg per piece (subject to actual)

Applicable Engines: Cummins ISB3.9/5.9, ISD4.5/6.7, ISF2.8/3.8, QSB3.9/5.9/6.7, G5.9 and other electronic/mechanical diesel engine series

Equipment: Commercial vehicles (Dongfeng Tianlong, Tianjin, Foton Auman, etc.), construction machinery (Komatsu, Sany, XCMG excavators/loaders/motor graders), forklifts, Cummins industrial generator sets, and marine power systems

Installation Location: Typically at key assembly sites such as gear chamber end faces, steering wheel shaft holes, front crankshaft locating cylinders, and accessory drive brackets, used for positioning and limiting between shafts, gears, gear chambers, and shock absorbers