CAT 526-9327 BEARING-SLV-GD

CAT 526-9327 is a Caterpillar genuine YM series straight-tube sleeve bearing (shoulder sleeve), suitable for articulated pins and light-to-medium load swing parts of mini excavators and loaders. Its main features are wear resistance and ease of assembly. The following are its key information.

Core Technical Parameters

Item Details
Part Model: CAT 526-9327 (YM Sleeve Bearing, Straight Cylinder, Flangeless, with Axial Lubrication Groove)

Material: Base 4140 Chromium-Molybdenum Steel, inner bore surface hardened (HRC 58-62), hardened layer thickness 0.6-1.0 mm, suitable for -40℃ to +120℃ operating conditions, compatible with oil/grease lubrication

Key Dimensions: Inner diameter 35 mm (1.378 in), outer diameter 42 mm (1.654 in), length 32 mm (1.260 in), wall thickness 3.5 mm, chamfer 0.8 mm

Unit Weight: Approx. 0.065 kg (0.143 lbs)

Tolerances and Clearances: Inner diameter tolerance H7 (+0.025/0 mm), outer diameter tolerance g6 (0/-0.016 mm), recommended clearance with pin 0.025-0.05 mm mm
Load Capacity: Radial rated load 52 kN, static allowable load 75 kN, coefficient of friction 0.09-0.12 (grease lubrication)
Structure and Core Functions
Wear-resistant and Durable: 4140 steel base with surface hardening layer, strong wear resistance, suitable for repeated swinging friction conditions of boom, stick, and other hinge points.

Highly Efficient Lubrication: Inner bore axial lubrication grooves ensure even distribution of grease, reducing dry friction, suitable for intermittently operating hinge parts, extending the life of pins and bearings.

Easy Assembly: Thin-walled straight cylindrical structure, cold press-fitting is possible, no complex tooling required, suitable for batch maintenance scenarios, reducing assembly time.

Clearance Adaptability: Precise tolerance control and reasonable fit clearance ensure flexible rotation of hinge parts, avoiding jamming and abnormal wear.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 303.5E2/304E2 mini excavator, 903M/904M mini loader, 416F backhoe loader, etc. Core Applications: Used for boom pin bushings, stick cylinder clevis bushings, connecting rod hinge points, steering mechanism pivots, etc., providing radial support and suitable for light to medium loads and low to medium speed swing conditions.

Installation and Maintenance Points

Installation: Clean the mounting holes and bearing surfaces, ensuring they are free of burrs and scratches; apply a pressing force of 5-8 kN, using a dedicated press head to press evenly, avoiding striking the end face to prevent damage to the hardened layer.

After installation, the coaxiality should be ≤ 0.05 mm, and the clearance should be controlled between 0.025-0.05 mm, ensuring smooth rotation.

Maintenance:
Lubrication: Add NLGI Grade 2 lithium-based grease every 300-500 hours, until overflowing; for oil lubrication, use CAT HYDO 10 hydraulic oil.

Inspection: Regularly monitor the clearance. If it exceeds 0.12 mm or abnormal noise occurs, replace the bearing immediately and check the pin wear.