CAT 327-4053 CENTERING BU

CAT 327-4053 is a Caterpillar genuine bucket centering and positioning block (centering seat). It’s used on incomplete buckets, at the connection point between the bucket and boom/stick on loaders, excavators, and other equipment. It enables quick centering and precise positioning during bucket installation, ensuring coaxiality of the pin assembly and improving operational stability and maintenance efficiency. Cat®… The following is key information.

Core Technical Parameters

Item Details
Part Model: CAT 327-4053 (Bucket Center Positioning Block / Centering Seat, Single Unit)
Material: Q345B low-alloy high-strength steel, integrally quenched, hardness HRC 32-38, surface sandblasted and rust-removed + epoxy primer, corrosion-resistant and wear-resistant

Key Dimensions: Length approx. 120mm, width approx. 80mm, height approx. 60mm, positioning groove diameter approx. 50mm, compatible with φ50mm bucket pin, mounting hole spacing approx. 100mm

Single Weight: Approx. 1.8kg (3.97 lbs)

Compatible Models: Bucket connecting lugs and boom/stick hinges of CAT 950H/966H loaders, 320D/323D excavators, D6N bulldozers, etc.

Performance Characteristics: Operating temperature -30℃ to +80℃, rated load ≥50kN, positioning accuracy… ±0.1mm, impact and vibration resistant, suitable for frequent loading and unloading conditions.

Structure and Core Functions

Precise Positioning: The positioning groove and pin fit precisely, enabling quick centering during bucket installation, ensuring pin coaxiality, and preventing pin wear and abnormal noise caused by assembly deviations.

Load Bearing and Buffering: Made of low-alloy high-strength steel, it can withstand impact loads during bucket operation, buffering the force on the hinge joint, protecting the connecting ear plate and pin, and extending the service life of components.

Assembly Assistance: Simplifies the bucket installation process, eliminating the need for repeated position adjustments, improving maintenance efficiency, and meeting the needs of rapid on-site repairs.

Corrosion Resistance Design: Epoxy primer coating enhances corrosion resistance, suitable for harsh outdoor conditions, and reduces the impact of rust on positioning accuracy.

Suitable Scenarios and Installation/Maintenance Points

Suitable Scenarios: Used for the bucket and boom/stick hinge joints of loaders, excavators, and other equipment, suitable for frequent bucket changes or hinge joint maintenance, ensuring equipment operational stability.

Installation Specifications:
Clean the positioning block and mounting surface, ensuring they are free of burrs, oil, and rust. Check that the positioning groove dimensions match the pin shaft to ensure reliable positioning after installation.

Use bolts for fastening. The torque should be as specified in the equipment manual (typically approximately 80-100 N·m). After installation, check the positioning block for looseness to ensure alignment accuracy.

Maintenance Recommendations:
Check the wear of the positioning block after each bucket disassembly. Replace the block if the positioning groove wear exceeds 0.2mm to prevent positioning failure.

Regularly check the bolt tightness. Tighten any loose bolts promptly to prevent the positioning block from falling off and causing safety accidents.

When storing the equipment for extended periods, apply anti-rust grease to protect the positioning block and extend its service life.