CAT 160-6308 158mm Long Bearing Cap

CAT 160-6308 is a Caterpillar pusharm double bolt bearing cap, which is suitable for pusharm hinge bearings in bulldozers, loaders, etc. Its core function is to fix the outer ring of the bearing, seal against dust and bear radial loads. It is a key positioning component for the connection between the pusharm and the frame. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 160-6308, Type: Double-bolted bearing cover (with sealing groove + positioning step), Material: Carbon steel (Q235B, tensile strength ≥370 MPa), Surface: Electrophoretic paint (salt spray resistance ≥480 h), Single weight: Approximately 1.8 kg, Suitable temperature: -40℃ to +120℃, Sealing method: Nitrile rubber (NBR) O-ring, Installation method: Double-bolt fastening

Key Dimensions
Bearing positioning inner diameter: 100 mm (suitable for CAT 160-6303 bearing outer diameter, tolerance H7, 100.00-100.03 mm), Bolt hole diameter: 14 mm (2 symmetrically distributed, hole spacing 130 mm, tolerance ±0.1 mm), Cover thickness: 20 mm (tolerance ±0.1 mm), O-ring groove diameter: 105 mm, width: 3 mm, Positioning step height: 6 mm mm Compatible Models and Parts: Compatible with Cat D6K/D6N bulldozer push arm hinge, 906H/907H loader bucket hinge, and 140M grader scraper arm. One piece per hinge, used to fix the outer ring of the 160-6303 self-aligning roller bearing, seal the hinge gap, and withstand the radial impact load during push arm operation.

Performance Parameters: Bolt tightening torque 85-95 N・m, O-ring compatibility pressure ≤1.0 MPa, hydraulic oil compatibility (Cat HYDO 10/ISO VG 46), impact load resistance ≥30 kN, service life ≥10000 hours (normal maintenance)

Structural and Performance Advantages: Integrated positioning and sealing: Integrates positioning steps and O-ring sealing grooves, fixing the bearing outer ring to prevent axial movement. The O-ring seal is dustproof and waterproof, protecting the bearing from contaminant corrosion and extending the hinge point’s service life.

High-strength Material: Constructed of carbon steel, suitable for heavy-load and impact conditions in boom operation. Electrophoretic paint surface treatment enhances corrosion resistance, making it suitable for harsh outdoor environments.

Easy Installation: The symmetrical double-bolt design ensures high positioning accuracy. No additional adjustments are needed during installation; simply tighten the bolts to complete positioning and sealing, improving maintenance efficiency.

Stable Load Bearing: The positioning step fits tightly against the bearing outer ring, distributing radial loads, avoiding localized stress concentration, and ensuring structural stability during boom operation.

Installation and Maintenance Points: Before installation, clean the bearing cap sealing groove, positioning step, and hinge point end face, checking for burrs and cracks. Install the O-ring (model 160-6309, diameter 105 mm × cross-section 3 mm), applying a small amount of grease. Tighten the bolts symmetrically (85-95 N・m) with a torque wrench, ensuring a tight, gap-free fit.

Maintenance Every 500 Hours: Check the bolt tightening torque, the O-ring for aging or damage, and the bearing cap for deformation. If the O-ring fails, replace it promptly to prevent bearing contamination and wear. Original parts should be used preferentially. Aftermarket parts may have problems such as insufficient dimensional accuracy and insufficient material strength, which can easily lead to bearing positioning deviation, seal failure, and cause push arm jamming and malfunction.