CAT 244-1103 RETAINER

CAT 244-1103 is a Caterpillar genuine steel shaft end retainer used to secure the spindle bearings and reaction hubs in assemblies such as final drives and wheel brakes, preventing axial movement of components. It is suitable for heavy-duty equipment such as mining trucks and large loaders. The following is the original data and does not include information on replacement parts.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 244-1103, Type: Shaft End Fixer, Material: Structural Steel (Q345B grade, galvanized and passivated surface, 96h salt spray rust prevention), Single Weight: 0.85 kg, Applicable Working Conditions: Heavy Load, Vibration and Impact, Working Temperature: -30℃ to +120℃, Rated Axial Load ≥80 kN, Adaptable Spindle Diameter: φ65-70 mm, Used for Final Drive Spindle Bearing Positioning and Reaction Hub Fixing

Key Dimensions (Metric / Imperial): Overall Length: 110.40 mm (4.331 in, Tolerance ±0.2 mm), Overall Width: 58.00 mm (2.283 in, Tolerance ±0.15 mm), Thickness: 6.00 mm (0.236 in, Tolerance ±0.05 mm), Mounting Hole Diameter: 10.50 mm (0.413 in, Tolerance +0.03/-0…) Thread specification 3/8-16 UNC, hole center distance 42.00 mm (tolerance ±0.1 mm), positioning groove depth 3.00 mm (tolerance ±0.05 mm)

Performance Parameters: Tensile strength ≥510 MPa, Yield strength ≥345 MPa, Hardness HB 180-220, Zinc plating thickness 8-12 μm, Installation torque 55-65 N・m, Disassembly torque ≤70 N・m, Number of reinstallation cycles ≤3

Structure and Compatibility Characteristics:

Structural Design: Integral stamping, with positioning groove and mounting hole. The positioning groove precisely fits the step surface of the mandrel. The mounting hole is secured with bolts to prevent loosening of the retainer and axial movement of components.

Compatible Parts: Compatible with final drive assemblies and wheel brake assemblies of mining trucks (e.g., 777D), large loaders (e.g., 992K), etc., used to fix bearings, reaction hubs, and other components on the mandrel, precisely matching the original mandrel and bearing models. Rust-resistant and durable: The surface is galvanized and passivated to enhance corrosion resistance, making it suitable for harsh working conditions such as outdoor and dusty environments, and extending its service life.

Installation and Maintenance Points (Original Data)

Installation: Clean the mandrel step surface, positioning groove, and retainer surface (free of oil, rust, and burrs). Align the positioning groove with the mandrel step surface and tighten with 3/8-16 UNC bolts (Cat 12-point bolts recommended, torque 55-65 N・m). After installation, the retainer should be straight, with parallelism to the mandrel end face ≤0.05 mm, and no axial movement of the components.

Maintenance: Check the bolt tightening torque every 500 hours to ensure no loosening; check the retainer surface for rust and deformation every 1000 hours. Damaged galvanized layers require recoating with anti-rust paint. After disassembly, if the retainer is deformed or cracked, it must be replaced and cannot be repaired.