CAT 607-3568 Lift Arm Cylinder Bearing

CAT 607-3568 is a Caterpillar original equipment manufacturer (OEM) boom cylinder joint bearing (suitable for the hinge joint between the boom cylinder and the frame/boom of loaders/bulldozers, bearing radial and bidirectional axial combined loads, suitable for low-speed oscillating conditions). The following is the original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 607-3568, Type: Self-lubricating radial spherical plain bearing (GE…ES type), Material: Outer ring (bearing steel GCr15) + Inner ring (carburized steel 20CrMnTi) + Solid lubricant (PTFE + bronze powder), Single weight 1.8 kg, Operating temperature: -40℃ to +150℃, Rated dynamic load: 150 kN, Rated static load: 450 kN, Limiting oscillation angle: ±15°, Limiting speed: ≤100 rpm (oscillation condition), Lubrication method: Self-lubricating (maintenance-free), Clearance group: C4, Rust prevention grade: IP65, Service life: ≥12000 hours

Key Dimensions Inner diameter: 70 mm (2.756 in), Outer diameter: 105 mm (4.134 in), Width: 35 mm (1.378 in), Chamfer: 2 mm × 45°, Inner diameter tolerance: 0/-0.015 mm, outer diameter tolerance 0/-0.021 mm, width tolerance ±0.20 mm, radial clearance 0.030-0.050 mm, surface roughness Ra 0.4 μm, outer ring hardness HRC 60-64, inner ring hardness HRC 58-62, cage material bronze, liner thickness 2 mm, preload 0.5-1.0 kN

Compatible Models and Parts: Compatible with Cat 966M/972M loaders and D6T/D7E bulldozer lifting arm cylinder upper/lower hinge points, one piece on each side, used to absorb the combined load during cylinder swing, reduce friction at the hinge, and ensure smooth lifting action.

Performance Parameters: Rated axial load 80 kN (bidirectional), friction coefficient μ≤0.08 (dry friction), impact load capacity 200 kN (instantaneous), liner wear rate ≤0.01 mm/100 Excellent oil resistance (compatible with hydraulic oil), excellent corrosion resistance, suitable for pins with a diameter of 70 mm (tolerance h7), and a seat bore tolerance of H8.
Structural and Performance Advantages:
Self-lubricating gasket design: PTFE + bronze powder solid lubricant, suitable for harsh working conditions such as dust and mud, requiring no additional lubrication, reducing maintenance costs, and avoiding wear caused by insufficient lubrication.

Complex load adaptability: The radial joint structure can simultaneously withstand radial loads and bidirectional axial loads, adapting to the complex forces during the swing of the lifting arm cylinder, preventing bearing seizure or damage.

High-hardness inner and outer rings: Outer ring GCr15 bearing steel + inner ring carburized steel, possessing high wear resistance and impact resistance, extending the bearing’s service life under heavy load conditions.

Installation and Maintenance Points (Original Data)

Installation: Clean the pin and bearing housing (free from oil and impurities). Use cold-press installation with an installation pressure ≤80 kN. After installation, radial runout should be ≤0.06 mm. The interference fit should be controlled between 0.05-0.08 mm. Do not strike the bearing end face to prevent damage to the gasket and inner/outer rings.

Maintenance: Check for wear every 1500 hours. Replace the bearing when wear exceeds 0.8 mm. Avoid prolonged overload (≤120% of rated load) to prevent bearing deformation and failure.

Troubleshooting: Increased oscillation resistance is often due to gasket wear or excessive clearance, requiring bearing replacement. Abnormal noise is often due to improper fit between the pin and bearing, requiring checking and adjusting the fit tolerances.