CAT 422-9523 BEARING-SLV-GD

CAT 422-9523 YM is a genuine Caterpillar wear-resistant sleeve, compatible with the boom/stick joints of Cat 320D2/323D2 excavators and other models. It provides radial support and wear protection under heavy-duty conditions. The following data is raw and does not include information on replacement parts (Cat® Parts).

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 422-9523 YM, Type: Single-row oil-free self-lubricating wear-resistant sleeve (outer diameter wear-resistant layer + inner diameter liner composite structure), Material: Outer layer 42CrMo alloy steel + inner layer copper-lead alloy (CuPb10Sn10), Surface Treatment: Nitriding + Hard chrome plating (wear-resistant layer thickness 0.15-0.20 mm, hardness HV 900-1100), Single Weight 1.85 kg, Applicable Pin Diameter φ65 mm, Rated Radial Load ≥120 kN, Working Temperature -30℃ to +150℃, Protection Rating IP65, Lubrication Method: Lifetime self-lubrication (apply lithium-based grease before assembly for auxiliary starting)

Key Dimensions
Outer Diameter φ85 mm (tolerance 0-0.03 mm), Inner Diameter φ65 mm (tolerance +0.02/+0.01 mm), Length 75 mm (tolerance…) ±0.15 mm), wall thickness 10 mm (tolerance ±0.05 mm), chamfer at both ends C2 mm, cylindricity ≤0.015 mm, roundness ≤0.01 mm, end face parallelism ≤0.02 mm

Performance Parameters: Coefficient of friction ≤0.12 (dry friction, with 42CrMo pins), wear rate ≤0.005 mm/1000 hours (full load condition), impact toughness ≥30 J/cm² (-20℃), fatigue life ≥8000 hours (rated load cycles), suitable pin surface hardness HRC 45-50, installation interference 0.02-0.04 mm

Structural and Performance Advantages:
Composite material design: outer alloy steel ensures structural strength, inner copper-lead alloy provides low friction and self-lubricating properties, suitable for heavy-load, low-speed oscillating conditions.

Nitriding + hard chrome plating: the wear-resistant layer significantly improves surface hardness and wear resistance, reducing the wear rate between the pin and the sleeve.

Precision Dimension Control: Strict tolerances and geometric tolerances ensure assembly accuracy, preventing abnormal noises and loosening caused by pin wear and excessive clearance.

Lifetime Self-Lubrication: No need for periodic lubrication, reducing maintenance frequency and suitable for long-term stable operation under harsh conditions.

Installation and Maintenance Points (Original Data)

Installation: Clean the pin and mounting hole (free from oil/rust/impurities). Use the cold-fit method (cool the sleeve in a -20℃ environment for 30 minutes before pressing it into the mounting hole). The pressing force should be ≤50 kN. After pressing, check that the sleeve end face is ≤0.1 mm flush with the mounting surface. Welding or gas cutting is prohibited. Do not strike the sleeve body.

Maintenance: Check the clearance between the sleeve and pin every 1000 hours (≤0.3 mm is normal, >0.5 mm requires replacement); check surface wear every 2000 hours (wear-resistant layer thickness <0.05 mm requires replacement). Avoid prolonged axial loads (axial load ≤20% of radial load) to prevent localized wear of the sleeve caused by pin bending.

Troubleshooting: Excessive clearance is usually due to excessive wear; replace the sleeve directly. Surface scratches are usually due to assembly impurities; replace the sleeve and clean the mounting surface. Abnormal overheating is usually due to excessive interference fit; select a new sleeve and control the interference fit.