CAT 436-2368 20mm Outer Diameter Front Fender Collar

CAT 436-2368 is a steel positioning bushing (spacer bushing) specifically designed for the connection between the front fender and the chassis/axle of Caterpillar wheeled construction machinery. It is used to fix the fender’s mounting position, absorb vibration, and prevent bolt loosening. It is suitable for light to medium load conditions. The following are the core information:

Core Parameters
Item Details
Basic Attributes
Model 436-2368, 20mm outer diameter steel front fender bushing, function is positioning + vibration isolation + anti-loosening, suitable for the front fender and chassis/axle mounting position, withstands axial pressure + slight radial vibration load, suitable for static/low-speed conditions with linear speed ≤0.1m/s

Compatible Models
CAT 416, 420, 424, 426, 430, 436 series backhoe loaders (reverse loaders), suitable for the connection between the front fender and the front axle/steering knuckle, 2-4 of these bushings are required for each front fender

Material and Manufacturing Process
Material is… Q235 carbon steel, galvanized and passivated surface (corrosion resistance ≥96 hours salt spray test), oil-free design, operating temperature -40℃ to +80℃, no additional lubrication required, suitable for bolt fastening installation.

Key Dimensions: Outer diameter 20.00mm (0.787in), inner diameter 12.00mm (suitable for M12×1.75 bolts), length 15.00mm (0.591in), wall thickness 4.00mm, weight approx. 0.02kg, installation clearance 0.02-0.05mm.

Functional Parameters: Axial rated load 5kN, radial rated load 1kN, clearance fit installation (bolt tolerance h6, collar inner diameter tolerance H7), suitable bolt surface roughness Ra≤3.2μm.

Matching Components: Suitable for M12×1.75 mounting bolts, 12mm flat washers, spring washers. 12mm diameter. A special socket wrench is required for installation. Recommended bolt tightening torque is 45-55 N·m.

Preparation before installation: Clean the inner and outer surfaces of the collar, mounting bolts, and mounting holes, removing burrs, oil, and rust. Check the collar for deformation, cracks, and peeling of the galvanized layer. Measure the bolt diameter and collar inner diameter to ensure the clearance is within specifications.

Installation steps: Place the collar onto the M12 bolt, positioning it between the fender mounting hole and the frame/axle mounting surface. Align the mounting hole, insert the bolt, and install the flat washer and spring washer in sequence. Tighten the bolt with a torque wrench to 45-55 N·m, avoiding over-tightening to prevent collar deformation.

Maintenance and replacement: Check the collar’s condition every 500 hours for deformation, loosening, and peeling of the galvanized layer. Replace the collar immediately when the outer diameter wear exceeds 0.2mm, or when cracks or deformation appear. It is recommended to replace the bolt, flat washer, and spring washer simultaneously during replacement.