CAT 4D-2305 RETAINER

CAT 4D-2305 is a Caterpillar genuine flexible retainer ring type retainer (shaft retainer ring/external retainer). The following is purely accurate original factory information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 4D-2305 (4D2305) Shaft Flexible Retainer

Part Type: Shaft Flexible Retainer Ring (External Retainer Ring), used to fix parts on a shaft (bearings, gears, bushings) and prevent axial movement

Material: 65Mn spring steel, heat treatment HRC 47-51, surface anodized black

Key Dimensions: Inner diameter 45.00mm (shaft diameter compatible with 45mm), wire diameter 1.50mm, outer diameter 51.00mm, free opening 12.00mm

Structural Features: Standard C-shaped opening, no lugs, no mounting holes, compatible with shaft grooves

Match Clearance: Interference fit with shaft grooves, groove diameter… 45.00mm (+0.02/-0.01mm), groove width 1.60mm (+0.10/-0.05mm)
Operating temperature -40℃ to +150℃, suitable for hydraulic and transmission systems of construction machinery
Load capacity: Static axial load ≥5kN, dynamic axial load ≥2kN
Weight: 0.012kg
Compatible models and assemblies:
Excavators: CAT 320D2, 323D2, 326D2 (slewing mechanism, travel gearbox output shaft)
Loaders: CAT 950M, 962M (gearbox second shaft, drive axle half shaft)
Bulldozers: CAT D6N, D6T (idler wheel shaft, track roller shaft)
Matching parts: 4D-2305 retainer, bearings (e.g., 329-1380), bushings, gaskets
Installation and fitting points: Clean the shaft groove, free of burrs and rust, surface roughness… Ra≤1.6μm.

Use snap ring pliers to open it to an outer diameter of 51.00mm, insert it into the groove, and allow it to spring back into place, with the opening facing the non-load-bearing end.

After installation, the snap ring end face should fit snugly against the part end face, with axial movement ≤0.05mm and no jamming.

Do not strike with hard objects to prevent deformation or breakage of the snap ring.