CAT 153-7551 RETAINER

CAT 153-7551 (1537551) is a Caterpillar original bearing locator/retainer used for axial positioning and anti-migration of bearings in rotating components such as hydraulic pumps and gearboxes. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 153-7551 Bearing Locator/Retainer (Snap Ring Type, Shaft Elastic Retaining Ring Assembly)

Part Type: Shaft Elastic Retaining Ring (Open Type), used to fix the axial position of bearings/gears/bushings, etc., to prevent movement during operation, suitable for low to medium speed and medium load conditions

Material: 65Mn spring steel, hardened to HRC48-52, surface anodized blackened, rust-proof and wear-resistant, suitable for operating conditions from -40℃ to 150℃

Key Dimensions: Inner diameter 60.00 mm (2.3622 in), outer diameter 70.00 mm (2.7559 in), thickness 2.00 mm (0.0787 mm) 4.00 mm (0.1575 in) opening width, slot diameter adapted to 60.00 mm (2.3622 in), slot width adapted to 2.00 mm (0.0787 in)

Structural Features: Open-type elastic structure. During installation, it is expanded and embedded into the slot on the shaft using a special tool. Axial positioning is achieved by elastic tension. The structure is compact, easy to install and disassemble, suitable for low and medium speed conditions, and allows for a small amount of radial runout compensation.

Compatible Structures: Hydraulic pump drive shaft bearing positioning, gearbox second shaft gear positioning, swing mechanism pinion shaft bearing anti-runaway, fan drive shaft bushing fixing.

Applicable Working Conditions: Suitable for axial load ≤8.5 kN, speed ≤6000 rpm, no strong impact conditions. Used for axial positioning of light to medium load rotating parts to ensure smooth operation.

Compatible Models and Assemblies:
Excavators: CAT 307E2, 308E2 (hydraulic pump bearing positioning assembly, swing mechanism pinion shaft fixing assembly)
Loaders: CAT 908M, 909M (Gearbox Second Shaft Gear Positioning Assembly, Fan Drive Shaft Fixing Assembly)
Small Road Roller: CAT CB22B, CB23B (Vibration Shaft Bearing Positioning Assembly, Travel Drive Axle Fixing Assembly)
Compatible Assemblies: 307E2 Hydraulic Pump Bearing Positioning Assembly, 908M Gearbox Second Shaft Positioning Assembly, CB22B Vibration Shaft Bearing Fixing Assembly
Installation and Fitting Points
Before installation, clean the shaft retaining groove, ensuring it is free of burrs, oil, and rust. The groove width is 2.00 mm (+0.02/-0.00 mm), and the groove depth is 1.00 mm (+0.01/-0.00 mm). Ensure the retaining ring fits snugly in the groove.

Use a retaining ring expander to evenly widen the opening. After inserting the retaining ring into the groove, release the tool and check that the retaining ring is fully engaged, without looseness or misalignment, ensuring reliable axial positioning.

After installation, it should fit snugly against the bearing/gear end face, with an axial clearance ≤0.10 mm. Operation should be free of abnormal vibration and noise to prevent axial movement of the component.

During disassembly, use special snap ring pliers to clamp the open end and expand it for removal. Do not pry forcefully to avoid deformation of the shaft retaining groove and retaining ring. Before reuse, check the elasticity and deformation; replace if it does not meet requirements.