442-2826: Sleeve Bearing (Bushing)

Cat 442-2826 is a Caterpillar shaft positioning/support sleeve, primarily used for shaft positioning, adjusting bearing clearance, and isolating components. It is suitable for low-to-medium speed, low-impact applications. Below are the structured authoritative parameters and application highlights:

Core Parameters (Precise Version)

Item Details
Basic Attributes
Model 442-2826, steel positioning sleeve/spacer, non-rotating component, suitable for hydraulic pump drive shafts, gearbox secondary shafts, differential side covers, fan clutches, steering pump support seats, etc. in Cat C13/C15/C18 engines, 950M/966M loaders, 320GC/336GC excavators, 777F mining trucks, etc.

Suitable Models
950M/966M/972M loaders, 320GC/336GC/349GC excavators, C13/C15/C18 engines, 777F/785C Mining trucks, D8T bulldozers, and 420F2/432E backhoe loaders use this material for hydraulic pump spindle positioning, gearbox gear spacing, differential bearing preload, power steering pump support, fan pulley positioning, and drive shaft intermediate support.

Material and Process: 42CrMo alloy steel, quenched and tempered (HRC 28-32), surface anodized black/galvanized passivation for corrosion protection. Tensile strength ≥1000MPa, yield strength ≥800MPa, parallelism of both end faces ≤0.01mm, inner hole roughness Ra 0.8μm, outer circle roughness Ra 1.6μm.

Key Dimensions: Inner diameter 50mm (1.969in), outer diameter 65mm (2.559in), length 30mm (1.181in), chamfer R1mm, weight approx. 0.22kg. Tolerances: Inner diameter H7 (+0.030/-0), outer diameter h6 (0/-0.019), length… ±0.1mm, compatible journal tolerance h6, installation clearance 0.01-0.03mm

Functional parameters: Axial load ≥50kN, radial positioning accuracy ≤0.02mm, operating temperature -40℃ to +120℃, compatible with mineral oil/synthetic oil media, no lubrication required, compatible bearings (379-2185, 5P-9209), seals (5P-9210), installation tool (8T-8730)

Compatible components: Compatible bearings 379-2185/5P-9209, seals 5P-9210/379-2188, installation tool 8T-8730, extreme pressure lithium-based grease 10-9275, compatible journal machining accuracy h6, bearing housing bore accuracy H7, installation axial clearance control 0.02-0.05mm Functions, Installation, and Maintenance Points

Core Functions: Axial positioning of the shaft system to prevent movement; adjustment of bearing preload to improve rotational accuracy; isolation of adjacent components to prevent friction and wear; transmission of minor axial loads, suitable for low-speed, low-impact shaft positioning and support scenarios in engineering machinery.

Installation Points: Clean the journal and sleeve inner hole to remove burrs and oil stains; press-fit using a press, do not strike; ensure the sleeve end face fits snugly against the shaft shoulder, with an axial clearance ≤0.02mm; after installation, check for radial runout ≤0.02mm, no jamming, and abnormal noise.

Maintenance Points: Check the sleeve for loosening, deformation, and corrosion every 2000 hours; disassemble and check for wear on the mating surfaces every 6000 hours; replace promptly if deformation, rust, or excessive clearance occurs to avoid affecting the shaft positioning accuracy.