9J-2587: Cap Assembly-Bearing

CAT 9J-2587 is a Caterpillar bearing cap assembly used to secure and seal bearing cavities. It is suitable for heavy-duty equipment such as drive axles and gearboxes. Key information is as follows:

Key Parameters
Item Details
Type: Integrated bearing cap assembly, including gasket, bolts, and locating pins. Used to secure the outer/inner ring of the bearing, seal grease, prevent foreign object intrusion, and is suitable for heavy-duty positioning and sealing conditions.
Dimensions (Metric/Imperial): Inner diameter 76.20mm (3,000 inches), outer diameter 139.70mm (5,500 inches), thickness 25.40mm (1,000 inches), bolt hole diameter 11.11mm (7/16 inches), 4 holes circumferentially distributed, hole spacing diameter 114.30mm (4,500 inches)

Material: Low-carbon alloy steel (AISI 1045), tempered to a high hardness. HB220-250, galvanized and passivated surface for corrosion resistance; gasket made of nitrile rubber (NBR), oil-resistant, suitable for operating conditions from -40℃ to 120℃.

Accuracy: Inner diameter tolerance ±0.02mm, flatness tolerance ≤0.015mm, bolt hole position tolerance ≤0.02mm, ensuring bearing positioning and sealing effect.

Installation Method: Bolt fastening installation, with anti-rotation locating pins; pre-compression of the gasket achieves static sealing, suitable for long-term equipment operation.

Suitable Scenarios: Suitable for drive axle differentials, gearbox output shafts, and engine crankshaft front ends of equipment such as Cat 966H/972H loaders, D6T bulldozers, and 349D excavators. Used to fix bearings, seal grease, prevent dust and moisture from entering the bearing cavity, and extend bearing life.

Suitable for replacing worn components during equipment overhaul or bearing replacement, eliminating the need to purchase seals and fasteners separately, improving maintenance efficiency.

Performance Characteristics
Integrated design with pre-installed gaskets and locating pins, improving installation efficiency by approximately 50% compared to separate bearing caps and reducing assembly errors.

Made of low-carbon alloy steel, offering strong resistance to deformation and approximately 35% longer fatigue life than ordinary carbon steel bearing caps, suitable for heavy-duty impact conditions.

Zinc-plated passivation + nitrile rubber seal, IP65 protection rating, suitable for harsh environments with high dust and humidity, such as mining and infrastructure projects.

Alternative Models
Direct replacements: 9J-2588, 8T-4172, interchangeable and suitable for the same equipment and installation conditions.