Used Caterpillar Wheel Reducer

Caterpillar Wheel Reducer: Function and Operation

The wheel reducer receives motion from the wheel shaft, itself driven by the differential and driveshaft. It multiplies torque through a planetary gearset: planetary gears, satellites, and an internal gear ring. This setup reduces rotational speed while increasing torque available at the wheel, easing stress on the rest of the axle. It is found on most wheeled construction equipment. On many Caterpillar wheeled excavators and loaders, the reducer and brake combine into a single wheel assembly, which affects the part reference to order.

Caterpillar Wheel Reducers in Stock

• Wheeled excavators: M312, M315, M316C, M318C, M318D, M320, M320F, M322C, and M325C.
• Wheeled loaders: from 906H to 988G, including 924G, 938G, 938H, 950G, 950H, 950K, 966H, 972K, 980G, and 980K.
• Dump trucks: articulated 725 to 740, including 735B, and rigid 769C to 775B.
• Tool carriers and telehandlers: IT12B, IT14G, IT28B, TH220B, and TH330B.
• Other equipment: compactors 826G and CB535B, backhoe loader 438B.

From Reducer to Axle: Related Parts

The wheel reducer works in conjunction with the entire axle. Before replacing it, check the wheel hub and its bearings, the wheel shaft and its splines, as well as the axle nose. Upstream, an unbalanced driveshaft causes vibrations that strain the entire driveline. For the whole drivetrain, see our Caterpillar transmission page. Do not confuse this with the Caterpillar swing reducer, which drives an excavator’s turret and requires different part numbers.

Ordering the Correct Wheel Reducer

• Machine: model, year, and serial number, including prefix.
• Position: front or rear, left or right side.
• Caterpillar part number for the full wheel assembly or reducer alone.
• Brake: reducer with or without integrated brake.
• Photos of the installed reducer and its nameplate.

Fitting a Used Wheel Reducer

Clean the bearing surfaces and replace seals if their condition is doubtful. Fill the reducer with the oil type and quantity recommended by Caterpillar for your model, then check the level after a few hours of operation. For assemblies with brakes, bleed the brake circuit. Finally, inspect the driveshaft and its universal joints: any play upstream transfers to the reducer. An original reducer installed on a healthy axle will perform as intended by the manufacturer.

Codimatra, Your Caterpillar Reducers

• Over 40 years of experience dismantling construction equipment.
• About 17,000 part references in stock, and our range of wheel reducers for all brands.
• Workshop inspection: rotation, play, condition of drained oil, and sealing.
• Expert advice from construction machinery technicians based on your serial number.
• Shipping on pallets from Castelculier, near Agen. Quotes at 05 53 96 16 43.