CAT 374-8355 BEARING-SLV-GD

CAT 374-8355 is a Caterpillar genuine YM straight sleeve bearing, suitable for low-to-medium speed, medium-load articulated/pin supports in excavators, loaders, and other machines. The following is precise information on the genuine part:

Core Parameters and Compatibility Information

Item Details
Part Model: CAT 374-8355 (3748355) Genuine YM Straight Sleeve Bearing, weighing approximately 0.56 kg (1.23 lb), suitable for articulated/linkage supports with a pin diameter of 60 mm, used for load bearing and friction reduction in rotary motion.

Core Materials: Steel backing + bronze alloy + PTFE filler layer. The steel backing ensures structural strength, the bronze layer bears load and conducts heat, and the PTFE layer reduces the coefficient of friction. Suitable for outdoor dusty and vibrating conditions, wear-resistant, impact-resistant, and with excellent thermal conductivity.

Key Dimensions: Inner diameter approximately 60.00 mm (2.362 in), outer diameter approximately… 65.00 mm (2.559 in), total length approximately 50.80 mm (2.000 in), straight flangeless structure, smooth inner bore, interference fit press-fit mounting hole, compatible with 60 mm pins, mounting hole diameter 65 mm.

Structural Features: Straight cylindrical integral structure, precision machined inner and outer circles, surface roughness Ra≤0.8μm, interference fit installation without loosening, suitable for continuous rotation/oscillation conditions, wears synchronously with the pin to ensure fitting accuracy.

Compatible Models: Compatible with boom, stick, or connecting rod hinge pins of CAT 336D/336E/349D excavators, 966M/972M loaders, and 140M/160M graders. Commonly used with 374-8356 pins, 585-1503 YM sleeve bearings, etc.

Accessories: Compatible with CAT 4C-9520 Install the punch and 5P-3510 bearing puller. Mounting hole tolerance H7, interference fit 0.03-0.06 mm. Cold press into place to avoid heating deformation.

Core Functions and Installation Points

Load Bearing and Friction Reduction: Supports the pin and reduces friction between it and the mounting hole, reducing component wear and ensuring flexible movement; evenly distributes the load to prevent localized stress concentration leading to deformation and damage.

Installation Specifications
Clean the mounting hole and bearing surface, checking for cracks and rust damage.

Cold press the pin into the mounting hole using a dedicated punch, ensuring the end face is flush with the mounting hole plane without tilting.

After installation, check the clearance between the pin and bearing (0.01-0.03 mm). Ensure smooth rotation without jamming, abnormal noise, or grease leakage. Tighten the relevant fasteners according to the model manual (usually 12-18 N·m).

Maintenance Recommendations: Inspect bearing wear, clearance, and surface condition every 600-800 operating hours. Replace with genuine parts immediately if clearance > 0.10 mm, surface peeling, or cracks are found.

Use only genuine CAT 374-8355 parts to avoid material/size mismatches that could lead to accelerated wear of the pin and mounting hole, jamming, or component failure.