CAT 383-2140 BEARING-SLV-GD

CAT 383-2140 (YM version) is a Caterpillar original high-precision cylindrical pin/locating pin, a core fastener for heavy-duty articulations and connections. YM indicates regional/process compatibility, emphasizing high strength, wear resistance, and shear resistance. It is widely used in engineering machinery for connecting rods, rocker arms, brackets, and hydraulic components.

Core Parameter Information

Item Details
Part Model: CAT 383-2140, YM Version Pin
Standard Name: PIN (Pin/Locating Pin)
Material: High-strength alloy structural steel, overall tempering + surface hardening, good core toughness, wear-resistant and impact-resistant surface
Surface Treatment: Blackening/phosphating for rust prevention, or hard chrome plating, wear-resistant, rust-proof, and friction-reducing
Key Dimensions: Nominal diameter adapted to corresponding bushing holes, length is standard assembly length, with chamfered or limiting structures at both ends for easy press-fitting/assembly
Suitable Scenarios: Heavy-duty shear stress parts such as boom/stick/rocker arm hinges, linkage connections, hydraulic cylinder lifting lugs, and bracket fixings in loaders, excavators, and bulldozers
Performance Characteristics: High shear strength, bending and fatigue resistance, suitable for frequent swinging, impact, and vibration conditions; high dimensional accuracy, compatible with bushings/ The hole fit clearance is stable, preventing jamming and abnormal noise.

Structure and Core Function

Connection and Force Transmission: As the core component of the hinge, it connects two or more moving parts, transmitting tension, pressure, and shear forces to ensure accurate movement trajectory.

Positioning and Guiding: High-precision outer diameter ensures coaxiality with bushings and lugs, limiting radial displacement and allowing only designed oscillation/rotation to prevent uneven wear.

Wear Resistance and Durability: High-hardness surface treatment, combined with lubrication and bushings, significantly reduces wear, extends the life of the entire hinge assembly, and reduces downtime maintenance.

YM Version Features: Optimized for specific regional working conditions and assembly standards, material toughness, surface finish, and dimensional tolerances are better suited to local heavy-duty operation requirements, resulting in greater consistency.

Installation and Maintenance Points
Before installation, thoroughly clean the pin, bushing, and lugs to remove burrs, rust, and dirt; otherwise, it will quickly cause scoring and jamming.

Use a press to press in smoothly; do not directly strike the pin end face to prevent deformation, bending, or damage to the surface hardened layer.

The appropriate grease/lubricating oil circuit must be used and replenished regularly to form an effective oil film and avoid dry friction.

At the same time, check the matching bushings, retaining rings, retaining rings, and seals. If any of these components show excessive wear, it is recommended to replace the entire set to prevent abnormal wear of the new pin by the old bushings.

Daily inspection focus: Check for bent or displaced pins, lubrication leaks, abnormal noises at the hinges, and increased clearance. If any of these are found, stop the machine immediately for inspection.