CAT 083-5020 RING ADJ

CAT 083-5020 (0835020) is a Caterpillar genuine bearing clearance adjusting ring (adjusting shim/axial locating ring), compatible with 259D3/279D3 skid steer loaders and 906H/907H mini excavators. It is used in conjunction with the 083-3296 double-row angular contact ball bearing assembly to precisely control the bearing axial clearance (0.03-0.08mm), ensuring smooth rotation and preventing vibration wear.

Core Parameters and Information

Item Details
Part Model: CAT 083-5020 (0835020) Bearing Clearance Adjusting Ring

Type: Axial clearance adjusting ring (adjusting shim) for construction machinery bearings

Material: 65Mn spring steel, galvanized and passivated for corrosion protection, hardness HRC42-48

Key Dimensions: Inner diameter 25mm, outer diameter 45mm, thickness 1.5mm, flatness ≤0.02mm, parallelism ≤0.03mm

Performance Parameters: Radial stiffness ≥3.2kN/mm, axial load capacity ≥8.5kN, temperature resistance -40℃ to +120℃, suitable speed ≤8000rpm

Compatible Models: 259D3/279D3 skid steer loaders, 906H/907H mini excavators

Matching Relationship: Compatible with 083-3296 double row angular contact ball bearing assembly, 083-5018 Matching elastic retaining rings for axle, precisely controlling bearing axial clearance.

Suitable for:

Compatible parts: Core transmission components such as connecting rod pins and boom joints in the working device of 259D3/279D3 skid steer loaders and 906H/907H mini excavators. Used with 083-3296 double-row angular contact ball bearing assemblies to precisely control bearing axial clearance, ensuring smooth rotation and preventing vibration wear.

Application scenarios: Suitable for frequent load-changing operations such as excavation and loading, including continuous excavation and shoveling operations. Ensures stable axial clearance of the bearing assembly under vibration conditions, preventing component loosening and wear, reducing the risk of failure, and improving operational safety and reliability.

Compatible usage: Used with 083-3296 double-row angular contact ball bearing assemblies and 083-5018 elastic retaining rings for axle. The adjusting ring provides precise axial clearance control, the bearing assembly provides rotational support, and the elastic retaining ring provides axial positioning, suitable for long-term high-frequency vibration operations, preventing component fatigue damage.

Installation and Maintenance Points

Installation: Clean the adjusting ring, bearing end face, and pin groove. Check the adjusting ring surface for scratches and deformation. Install the adjusting ring between the bearing end face and the retaining ring, ensuring a good fit without warping or looseness. After installation, measure the bearing axial clearance, ensuring it is within the range of 0.03-0.08mm. Otherwise, replace with an adjusting ring of a different thickness (1.2mm/1.5mm/1.8mm are optional).

Maintenance: Check the adjusting ring every 200 hours for deformation, rust, or breakage. Replace immediately if any abnormalities are found. Avoid using sharp tools to pry the adjusting ring to prevent deformation or damage, which could affect clearance control.

Replacement: When removing the old adjusting ring, take care to protect the bearing and pin to prevent damage. Before installing the new adjusting ring, check its dimensions, flatness, and parallelism to ensure it matches the original specifications. After installation, test that the component rotates smoothly without abnormal noise and that the axial clearance meets the standard.