CAT 148-9412 Transfer Gear Retainer

CAT 148-9412 is a Caterpillar genuine shaft retaining ring assembly (including retaining ring, positioning washer, and mounting tool adapter slot). It is used for positioning the shaft end/bearing of hydraulic pumps, gearboxes, or rotary mechanisms to prevent axial movement of components. It is suitable for medium and high speed rotation and reciprocating motion scenarios and is a core fastener to ensure the stability of transmission and hydraulic systems. It is commonly found in critical rotating parts of excavators, loaders, and other equipment. The following are the core information and key points:

Core Technical Parameters

Item Details
Part Model CAT 148-9412 (1489412) Retaining Ring Assembly, original factory complete set, including elastic retaining ring + positioning flat washer, suitable for shaft groove installation scenarios Cat® …

Material Retaining Ring: 65Mn spring steel, quenched + tempered, hardness HRC 42-48, elastic limit ≥1200MPa; Washer: SUS304 stainless steel, corrosion resistance ≥96 hours neutral salt spray test Cat® …

Key Dimensions Retaining Ring Inner Diameter 50mm, Free Outer Diameter 56mm, Thickness 2.5mm, Groove Width 2.6mm, Suitable for shaft groove diameter 53mm; Washer Inner Diameter 50mm, Outer Diameter 58mm, Thickness 1.5mm, Chamfer C0.5, Suitable for installation tool groove width 6mm Cat® …

Compatible Models CAT Cat® is used for bearing positioning or anti-migration at the shaft ends of 326D2/330D2 excavators, 950M loaders, D7E bulldozers, etc., for main pump drive shafts, rotary motor output shafts, and gearbox shafts.

Performance Parameters: Rated axial load 12kN, operating temperature -40℃ to 150℃, compatible with mineral oil/synthetic oil media, rotational linear speed ≤15m/s, cycle life ≥100,000 cycles, no permanent deformation.

Core Functions and Structure:

Axial Positioning and Anti-migration: Embedded in the shaft groove, it firmly holds the component through elastic tension, preventing axial displacement of bearings, gears, impellers, etc., avoiding loosening and wear of components under impact loads.

Clearance Compensation and Buffering: Matching washers absorb vibration, compensate for installation clearances, reduce impact between components, reduce noise and fatigue damage, and improve system smoothness. Quick Assembly and Disassembly: The flexible structure supports installation/removal with dedicated snap ring pliers, suitable for batch repair scenarios, eliminating the need for complex tools and improving maintenance efficiency (Cat®…).

Sealing Assistance: When used with O-rings or oil seals, it can assist in fixing the seal, preventing leakage caused by seal displacement, and ensuring the integrity of the sealing system (Cat®…).

Installation and Maintenance Points
Installation Specifications: Clean the shaft groove and retaining ring assembly, removing burrs and oil stains; use dedicated snap ring pliers to open the retaining ring, align it with the shaft groove, and smoothly insert it, ensuring the retaining ring is fully inserted and the washer fits snugly against the end face of the component (Cat®…).

Post-Installation Inspection: The retaining ring should not be stuck, its elasticity should be normal, there should be no axial movement of the push-pull components, and there should be no abnormal noise during rotation, ensuring reliable positioning (Cat®…).

Maintenance Recommendations: Check every 600 working hours: Check the retaining ring for deformation, breakage, or corrosion, and check the shaft groove for wear. Replace immediately if any abnormalities are found; when replacing, the entire set (retaining ring + washer) must be replaced to avoid mixing old and new parts, which could lead to positioning failure (Cat®…). Do not strike the retaining ring with hard objects to prevent loss of elasticity; apply a small amount of grease before installation to reduce assembly resistance and wear, and extend the service life of Cat®…

Use genuine 148-9412 components as a first choice. Do not use ordinary retaining rings to avoid component loosening or system failure due to incompatibility in material, size, or elasticity. Cat®…