CAT 237-9354 Bearing – Thrust(Debris Resistant)

CAT 237-9354 is a single-sided thrust washer with locating steps used by Caterpillar for transmissions/torque converters. It is designed for axial positioning of planetary gear sets/output shafts in equipment such as the Cat 793D mining truck and 988K loader, used to withstand unidirectional heavy axial forces and limit axial movement of the shaft system. The following is professional structured information.

Core Parameters (Professional Version)

Project Details
Basic Attributes: Model 237-9354, Single-sided thrust washer with positioning step, inner diameter φ100 mm (tolerance H7: 0–+0.035 mm), single weight 0.28 kg, axial clearance 0.05–0.12 mm, single unit usage 1 piece (planetary carrier output end / torque converter turbine shaft thrust end)

Key Dimensions: Inner diameter φ100 mm (tolerance JS6: ±0.01 mm), outer diameter φ145 mm (tolerance 0–-0.03 mm), thickness 6 mm (tolerance ±0.05 mm), positioning step diameter φ110 mm (tolerance 0–-0.02 mm), step height 2 mm (tolerance ±0.03 mm), thrust surface flatness ≤0.01 mm, chamfer at both ends 1 mm × 45°

Material and Process: Matrix is ​​42CrMo Alloy steel (quenched and tempered HB 260–300, surface induction hardened HRC 58–62, hardened layer depth 1.5–2 mm); thrust surface coated with MoS₂ solid lubricant coating (thickness 0.01–0.02 mm, coefficient of friction ≤0.08), no oil grooves/holes, positioning steps for anti-rotation and axial positioning.

Performance Parameters: Rated axial load 180 kN (linear velocity ≤1.5 m/s), coefficient of friction ≤0.08 (boundary lubrication), operating temperature -40℃ to +150℃, compatible journal hardness HRC 50–55 (hardened layer ≥2 mm), compatible mounting slot φ145 J7 (+0.01–-0.01 mm).

Compatible Models: Mining trucks 793D/797F (transmission planetary gear set), loaders 988K/992K (torque converter turbine shaft thrust end), excavators. 390F (Thrust end of output shaft of rotary gearbox), compatible with shaft diameter φ100 mm (tolerance h6: 0–-0.022 mm)

Installation and Maintenance Points: Before installation, clean the journal (surface roughness Ra≤0.8 μm, no scratches/burrs) and mounting groove. Use a special tool to align the seat ring positioning step with the groove and press it in. Do not strike the thrust surface. The journal needs to be tempered to HB 280–320 and surface hardened to HRC 50–55 (hardened layer ≥2 mm).

Clearance Control: After installation, use a plug gauge to measure the axial clearance, ensuring 0.05–0.12 mm. If the clearance exceeds the tolerance, adjust by replacing the adjusting shims with different thicknesses (0.05 mm/0.1 mm specifications). For heavy-load conditions, a clearance of 0.08–0.1 mm is recommended.

Lubrication Requirements: Apply extreme pressure lithium-based grease (NLGI Grade 2) to the thrust surface before installation. During operation, rely on system oil lubrication (flow rate ≥ 0.8 L/min). Check oil quality/quantity every 2000 hours to prevent dry friction on the thrust surface from causing coating wear.

Troubleshooting: If abnormal noise/temperature rise occurs, first check for thrust surface wear (wear > 0.1 mm requires replacement), deformation of the locating step, or insufficient lubrication. If necessary, replace the bearing race and correct the axial runout of the shaft system to ≤ 0.1 mm.