108-8283: Bolt-On Trunnion

Cat 108-8283 is a Caterpillar bolt-on trunnion, primarily used for the articulation between the pusharm and chassis of heavy machinery such as bulldozers, ensuring angle adjustment and load-bearing capacity during operation. Below are the precise core information:

Core Parameters (Precise Version)

Item Details
Basic Information
Model 108-8283, type is bolt-on trunnion (also known as articulated trunnion), used to connect the bulldozer pusharm to the chassis, enabling the pusharm’s pitch and oscillation, suitable for heavy-duty, high-impact Cat® Parts

Compatible Models
Compatible with bulldozers such as Cat D8L, D8N, and D8R, installed at the articulation point between the pusharm and chassis, used to connect the pusharm to the lifting cylinder and tilting cylinder, ensuring stable operation during bulldozing.

Material and Process
Material is 42CrMo alloy steel, forged and tempered, hardness… HRC32-38, possessing high strength, high toughness, and fatigue resistance; Manufacturing process: precision CNC machining, spherical surface hardening, hardness HRC50-55, chrome plating for corrosion and wear resistance, suitable for harsh working conditions in engineering machinery.
Key dimensions: Spherical outer diameter 177.6mm (6.99 inches), total length 241.5mm (9.51 inches), mounting hole diameter 27.4mm (1.08 inches), number of bolt holes 4, hole spacing (diagonal) 180mm, weight approximately 12.5kg, dimensional tolerance ±0.05mm, ensuring hinge accuracy and fit clearance (Cat® Parts).
Compatible components: Compatible bolt type 10-3222 (M20×100mm), compatible washer type 9L-4321, recommended to use with spherical plain bearing (model…). (177-4144) Installation, improving articulation flexibility and wear resistance
Function, Installation, and Maintenance Points
Core Function: As the core articulation component between the push arm and the frame, it transmits the thrust and pull forces of the hydraulic cylinder, enabling push arm angle adjustment, ensuring efficient bulldozing operations, and simultaneously bearing impact loads during operation to maintain the structural stability of the bulldozing device.

Installation Points: Clean the mounting surface and trunnion surface. After installing the spherical bearing, tighten the bolts diagonally and evenly (torque 180-200 N·m). After installation, check the articulation clearance; radial runout ≤ 0.1 mm, ensuring flexible and smooth movement.

Maintenance Points: Regularly check the bolt tightness, trunnion spherical surface wear, and lubrication status. Add lithium-based grease every 500 hours. Replace immediately if wear, deformation, or cracks are found to prevent articulation failure and potential safety accidents.