CAT 6E-3268 RETAINER

CAT 6E-3268 (6E3268) is a Caterpillar original equipment manufacturer (OEM) Circlip-Type Shaft Retainer, suitable for positioning shaft ends/bearings in engines and hydraulic pumps. The following is purely precise information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 6E-3268 Circlip-Type Shaft Retainer

Part Type: Circlip-Type Shaft Retainer (circlip), used for positioning rotating components such as bearings, gears, and impellers on shaft ends, bearing axial positioning loads, and preventing axial movement of components.

Material: 65Mn spring steel, quenched and tempered, hardness HRC47-54, galvanized passivation for corrosion protection.

Key Dimensions: Inner diameter 38.10 mm, outer diameter 47.63 mm, thickness 1.52 mm, opening width 3.18 mm, diameter tolerance ±0.05 mm

Structural Features: Standard open-type circlip-type retainer, no lugs/ Featuring a narrow lug structure, this machine is designed for grooved mounting on the shaft, relying on elastic tension to engage with the groove for axial fixation.

Compatible Structures: Fits engine camshaft ends, hydraulic pump drive shaft bearing positioning grooves, and small gearbox output shaft positioning areas.
Applicable Working Conditions: Suitable for low-to-medium speed (≤3000 r/min) rotating shaft systems operating at -40℃ to 120℃ without strong impacts, with a static axial positioning load ≤5 kN.
Compatible Models:
CAT 301.7CR/302.7D Mini Excavators (Hydraulic pump drive shaft end bearing fixation, swing motor shaft end positioning)
CAT C1.1/C1.5 Engines (Camshaft end fixation, oil pump gear shaft positioning)
CAT 226B3/236D Skid Steer Loaders (Hydraulic pump input shaft bearing retaining ring, gearbox two-shaft positioning circlip)
CAT 303.5E2 Mini Excavators (Stick cylinder piston rod end bearing fixation, boom pivot retaining ring)
Installation and Fitting Points: Fits the appropriate shaft groove width. The retaining ring has a diameter of 1.60-1.70 mm, a groove depth of 1.55-1.65 mm, and a groove diameter of 38.10 mm. The retaining ring should have an interference fit with the groove and should not loosen after insertion.

Use snap ring pliers to gently pry open the retaining ring and carefully insert it into the shaft groove. Do not use needle-nose pliers to pry it open, as this may deform or break the retaining ring.

Before installation, clean the shaft groove to remove burrs and oil stains. Inspect the retaining ring for cracks, deformation, and good elasticity.

After installation, the end face of the retaining ring should fit snugly against the component being fixed, with an axial clearance ≤0.03 mm and no axial movement of the component.

Apply lithium-based grease to the contact surface between the retaining ring and the shaft groove to reduce fretting wear.