CAT 608-7313 BEARING-SLEE

CAT 608-7313 is a thick-walled sleeve bearing specifically designed for heavy-duty articulated joints in Caterpillar large excavators. It is suitable for core joints such as the boom-stick, stick-bucket, and lift cylinder articulations in heavy-duty excavators like the 374/395, providing radial support, wear protection, and load transfer. The following is the structured core information:

Core Parameters
Item Details
Basic Attributes
Model 608-7313, heavy-duty thick-walled sleeve bearing, no oil groove/hole, press-fit/interference fit installation method, forms a precision fit with the pin and bearing housing bore, withstands strong impacts and heavy loads, suitable for low-speed oscillating conditions (≤300rpm)

Compatible Models
Caterpillar 374/374F/395/395F large excavators, suitable for heavy-duty holes in boom-stick articulations, stick-bucket articulations, lift cylinder lower articulations, and frame connecting rod joints.

Material and Manufacturing Process Low-carbon alloy steel (20CrMnTi) base material, surface carburized and quenched, hardness HRC 58-62, wear-resistant layer thickness 1.5-2.0mm, surface roughness Ra 0.8μm, dimensional tolerance GB/T 1804-f

Key Dimensions: Inner diameter 140mm (5.512in), outer diameter 160mm (6.299in), length 100mm (3.937in), wall thickness 10mm, single-sided chamfer 2×45°, weight approx. 8.2kg

Functional Parameters: Radial load ≤120MPa, operating temperature -40℃ to +150℃, compatible with lithium-based grease (Cat DEO-ULS), clearance with pin 0.10-0.15mm, ultimate impact load ≤250kN

Matching Components: Compatible pin diameter 140mm, matching bearing housing inner diameter 160H7, mating seal ring 4T-0520, mounting retaining ring 6V-0812, bolt 8T-4120 Installation and Maintenance Points

Preparation before installation: Clean the bearing housing bore and sleeve surface, removing burrs, oil, and rust; check the roundness of the bore ≤0.03mm, and control the interference fit between the sleeve outer diameter and the bore 0.02-0.04mm to avoid excessive interference that could cause sleeve deformation or damage to the housing bore.

Pressure fitting steps: Use a hydraulic press + special tooling to press vertically and smoothly, with a pressing speed ≤5mm/s, avoiding skewing; after pressure fitting, check the end face flatness ≤0.05mm and the coaxiality with the mating parts ≤0.08mm; before installing the pin, evenly apply lithium-based grease to the mating surfaces to ensure sufficient lubrication.

Maintenance and Replacement: Check the sleeve for wear and looseness every 200 hours. Replace it when the inner diameter wear exceeds 0.3mm or cracks/peeling appear on the surface. Avoid dry friction and overload impact. Tighten the surrounding bolts regularly to prevent sleeve displacement. Add grease every 500 hours.