374-4846: 53.96mm Outer Diameter Slotted Head Steel Retainer

Cat 374-4846 is a Caterpillar grooved steel retainer (also known as a grooved retainer ring/shaft retainer) used for axial positioning and anti-loosening of shafts, bearings, gears, and other components in construction machinery. It is suitable for heavy-duty vibration conditions. Below are the core parameters and application points:

Core Parameters (Precise Version)

Item Details
Basic Information
Model 374-4846, type is a flexible grooved steel retainer for shafts, suitable for shaft groove installation, used to lock the axial displacement of bearings, gears, pulleys, etc., preventing component loosening, improving transmission system stability, conforming to ISO 8936 standard, suitable for Cat 320GC/336D excavators, 950M loaders, C9.3 engine, D5 bulldozers, and other models’ transmission, hydraulic, and travel systems (Cat® Parts)

Compatible Models
Compatible with Cat 320GC/323GC/336D/349D excavators, 950M/962M Cat® Parts are commonly used in loaders, C9.3/C13 engines, 420F2 backhoe loaders, D5/D6 bulldozers, and 299D3 skid steer loaders, particularly in hydraulic pump spindles, travel motor output shafts, gearbox gear shafts, drive axle half shafts, and bearing locating slots. The material is 65Mn spring steel, hardened and tempered to a hardness of HRC 42-48, with a galvanized passivation surface for corrosion protection. It passes a salt spray test for ≥48 hours. The elastic modulus is 206 GPa, tensile strength is ≥1200 MPa, and elongation at break is ≥5%. It can withstand heavy loads and frequent vibrations without the risk of deformation or failure. Key dimensions include an outer diameter of 53.96 mm, an inner diameter of 48.0 mm, a thickness of 2.5 mm, a slot width of 2.6 mm, a slot diameter of 48.5 mm, an opening gap of 1.2 mm, and a weight of approximately [weight missing]. 0.12kg, radial runout ≤0.05mm after installation, axial load capacity ≥8kN, suitable for shaft groove installation with a shaft diameter of 48mm.

Matching Components: Compatible with Cat 10-9275 extreme pressure lithium-based grease (apply to the groove surface before installation), Cat 8T-8730 snap ring pliers (for mounting and dismounting the retainer). The matching shaft groove has a machining accuracy of H7 and a surface roughness Ra≤1.6μm to ensure a secure installation without loosening or abnormal noise.

Function, Installation, and Maintenance Points:

Core Function: Utilizes elastic snap-fit ​​into the shaft groove to achieve axial positioning of components, preventing axial movement caused by vibration and impact, protecting critical components such as bearings and gears, suitable for heavy-load and high-speed conditions, and improving the reliability of the transmission system.

Installation Points: The shaft groove must be clean and free of burrs. Use snap ring pliers to open the retainer, align it with the shaft groove, and snap it in, ensuring it is fully embedded in the bottom of the groove without tilting. After installation, check that the retainer is tightly secured and has no axial clearance. Do not hammer during installation to avoid deformation of the retainer.

Maintenance points: Check the retainer for deformation, breakage, and corrosion every 500 hours, and replace it in time if any abnormality is found; avoid contact with acid and alkali media to prevent corrosion failure; use special snap ring pliers when disassembling to avoid damaging the shaft groove and retainer.