CAT 597-4239 Straight Sleeve Bearing

CAT 597-4239 (5974239) is a Caterpillar genuine straight sleeve bearing, suitable for rocker arm shaft supports in engines such as the C7.1. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 597-4239 Straight Sleeve Bearing

Part Type: Straight sleeve bearing for rocker arm shaft support, used to reduce friction between the rocker arm shaft and the rocker arm, ensuring smooth rocker arm movement

Material: Steel-backed bronze; steel back ensures strength, bronze layer reduces friction, surface without internal/external lubrication grooves or intersecting oil holes

Key Dimensions: Inner diameter 57.00 mm (2.244 in), outer diameter 65.00 mm (2.559 in), total length 25.00 mm (0.984 in), wall thickness 4.00 mm

Structural Features Flanged straight-tube structure, suitable for clearance fit between rocker arm shaft and rocker arm, lubricated by oil splash, requiring no additional lubrication maintenance after installation.

Compatible Structure: Matches C7.1 engine rocker arm shaft and rocker arm mounting holes, used for rocker arm support.

Applicable Working Conditions: Medium to high speed, medium load, suitable for high-temperature, vibration, and oil mist lubrication environments in engine compartments.

Compatible Models:
CAT 320GC/323GC Excavators (C7.1 engine rocker arm shaft support)
CAT 420F2/430F2 Backhoe Loaders (C7.1 engine valve train rocker arm area)
CAT 924K/926M Wheel Loaders (C7.1 engine rocker arm shaft sleeve bearing mounting end)
CAT 299D3 Compact Tracked Loader (C7.1 engine rocker arm assembly)

Installation and Fitting Points: The bearing and rocker arm mounting hole are interference fit (interference 0.010–0.020). The bearing (0.030–0.050 mm) is clearance-fitted with the rocker arm shaft to ensure smooth, unobstructed operation.

Use a dedicated press to press the bearing smoothly, avoiding striking the bearing end face. After installation, check that the bearing end face is flush with the rocker arm plane and not skewed.

Before installation, clean the bearing, rocker arm mounting holes, and rocker arm shaft, checking for cracks, deformation, and peeling of the anti-friction layer.

The bearing is positioned radially by the rocker arm mounting holes, with no axial constraints to allow for free thermal expansion and contraction. After installation, check that the rocker arm swings freely without jamming or abnormal noise, and that the oil passages are unobstructed.

As per the machine manual, check the clearance between the rocker arm shaft and bearing every 1000 working hours. Replace the bearing if the clearance exceeds 0.10 mm.