CAT 1U-2899 129mm Inner Diameter Sleeve

CAT 1U-2899 (1U2899) is a Caterpillar genuine radial locating sleeve, suitable for positioning the shaft end/bearing of engines, transmissions, or hydraulic pumps. It is used to fix the bearing outer ring, eliminate axial clearance, and ensure coaxiality. The following is precise genuine part information:

Core Parameters and Compatibility Information

Item Details
Part Model: CAT 1U-2899 Genuine radial locating sleeve, weighing approximately 0.15 kg (0.33 lb), suitable for low-to-medium speed, medium-load shaft end positioning scenarios. Used to fix the bearing outer ring, eliminate axial clearance, and is suitable for engine camshafts, transmission output shafts, or hydraulic pump drive shafts, ensuring the coaxiality of the bearing and shaft, providing positioning and anti-migration functions.

Core Material: Low-carbon alloy steel sheet, stamped and formed, with galvanized passivation treatment for rust and corrosion resistance. Suitable for outdoor humid and dusty conditions, preventing loosening or jamming caused by rust. Structural strength and durability meet general operating requirements.

Key Dimensions: Inner diameter approximately… 38.00 mm (1.496 in), outer diameter approx. 50.00 mm (1.969 in), total length approx. 15.00 mm (0.591 in), annular locating step, mounting hole tolerance H7, interference fit with bearing outer diameter, interference 0.01-0.03 mm

Structural Features: Annular locating step design, burr-free edges, precise fit between inner hole and bearing outer diameter, axial positioning to prevent movement, ensuring bearing and shaft coaxiality, suitable for low-to-medium speed conditions, compact structure, and easy installation.

Compatible Machines: Compatible with CAT 320D/323D excavators, 950G/950H loaders, 140M/160M graders, engine camshafts, gearbox output shafts, or hydraulic pump drive shafts, etc., for locating radial bearings, suitable for low-to-medium speed and medium load conditions.

Accessories: Compatible with CAT 5P-3510 bearing puller, 4C-9520… Install the punch sleeve, using either a CAT 186-2915 needle roller bearing or a 360-2326 YM sleeve bearing. Installation requires a tight fit with the bearing end face to ensure precise positioning.

Core Functions and Installation Points

Positioning and Anti-migration: Axially positions the bearing to prevent axial movement during operation, ensuring coaxiality between the bearing and shaft, reducing localized wear and jamming, suitable for low-to-medium speed and medium-load conditions.

Installation Specifications
Clean the mounting hole, sleeve, and bearing surface, checking the sleeve for deformation, cracks, rust, or other damage.

First, cold press the bearing into the mounting hole, then insert the 1U-2899 sleeve into the positioning groove, ensuring a complete fit with the bearing end face without gaps.

Tighten with bolts (torque according to the model manual, typically 10-15 N·m). After installation, check that the bearing rotates freely without jamming, abnormal noise, or axial movement/backlash.

Maintenance Recommendations: Check the sleeve tightness, surface rust, and deformation every 600-800 working hours. Replace with genuine parts immediately if loose, deformed, or severely rusted.

Use only genuine CAT 1U-2899 parts to avoid mismatched dimensions/materials that could lead to positioning failure, accelerated wear of the shaft and mounting holes, or component failure.