CAT 607-3569 Lift Cylinder Bearing

CAT 607-3569 is a Caterpillar genuine lifting cylinder bearing (heavy-duty straight sleeve bearing), suitable for the lifting cylinder cylinder and lug hinge joint of Cat 950M/966M loaders, 140M graders, etc. It is used to bear the reciprocating and eccentric loads of the cylinder, reducing wear on the pin and pin hole. It weighs approximately 2.1 kg. The following is professional structured information:

Core Technical Parameters (Professional Version)

Item Details
Basic Attributes
Model: 607-3569 Lifting Cylinder Bearing, Type: Straight Heavy-Duty Sleeve Bearing (with double lubrication grooves + double oil injection holes), Material: 4140 Chromium Molybdenum Steel, Overall Hardened (HRC 58-62, Hardened Layer 2.0-2.5 mm), Inner Diameter: φ70 mm, Outer Diameter: φ90 mm, Total Length: 100 mm, Weight: 2.1 kg, Fitting Pin: φ70 mm, Rated Load: 220 kN, operating temperature -30℃ to +120℃, compatible with NLGI 2 lithium-based grease (with EP additive), corrosion resistance IP65, with 2 axial lubrication grooves and 2 radial oil injection holes, interference fit with mounting base (0.025-0.035 mm)

Key Dimensions: Inner diameter tolerance +0.012/-0.008 mm, outer diameter tolerance +0.025/-0.015 mm, length tolerance ±0.15 mm, inner hole surface roughness Ra≤0.8 μm, outer diameter Ra≤1.6 μm, lubrication groove width 4 mm, depth 2.5 mm, oil injection hole diameter φ5 mm, chamfer at both ends 1.5×45°, end face runout ≤0.04 mm

Material and Process: 4140 alloy steel, forged and precision machined + Grinding and forming, overall induction hardening to enhance surface wear resistance, lubrication groove and oil injection hole connected, seat ring for axial positioning and load bearing, bushing body interference fit installation, inner hole and pin working clearance 0.06-0.09 mm, coaxiality ≤0.05 mm. Compatible models: Cat 950M/966M/972M loader lifting cylinder lug bearing, 140M/160M grader blade lifting cylinder hinge bearing, 950L/966L loader boom and lifting cylinder connecting pin bearing, suitable for lifting cylinder hinge parts with pin diameter φ70 mm.

Assembly fit: Press-fit pressure ≥12 t (hydraulic press + special tooling), after installation, inner hole and pin clearance 0.06-0.09 mm, seat ring end face flush with mounting base plane (deviation ≤0.1 mm). (mm), align the oil filling hole with the oil passage in the mounting hole during installation.

Installation and Maintenance Points:

Before installation, clean the mounting hole, pin, and bearing. Check for cracks and deformation, and ensure the lubrication groove and oil filling hole are unobstructed. Use a special tooling for positioning and press-fitting. Do not hammer, as this may deform or damage the bearing.

After installation, check that the hinge movement is flexible and free from jamming. Run the bearing under no-load for 30 minutes, monitoring the temperature to ≤85℃. Check every 1000 hours. Replace immediately if wear >0.25 mm or if scratches or peeling appear.

The initial grease filling amount is 1/2 of the bearing volume. Replenish grease every 800 hours. In dusty/humid conditions, shorten this to 400 hours. It is recommended to use Cat-specific lithium-based grease (containing EP additive).