Used Front Axle Bevel Gear Set

Role of the Bevel Gear in a Tractor's Front Axle

The bevel gear set combines a pinion and a crown gear. It operates as a right-angle drive: it redirects the driveshaft's rotation at a right angle while reducing rotational speed and increasing torque to the wheels. These two components are precision-cut and matched together: this is called a paired set, identifiable by its tooth count. On a four-wheel drive tractor, the front axle gear ratio is coordinated with the rear axle. A differing reduction ratio causes the front axle to either drive or resist movement, accelerating tire wear and stressing the transmission.

Used Bevel Gears Available at TMC Bejenne

• Front axle bevel gear sets for engines of Massey Ferguson, John Deere, New Holland, and Case IH tractors.
• Parts for Renault, Deutz-Fahr, Same, or Fiat tractors, depending on arrivals.
• Pinion and crown gear supplied together, always matched sets.
• Parts sourced from major suppliers, such as Dana Spicer, Carraro, or ZF, depending on the model.
• Associated parts from the same assembly: wheel shaft, wheel reducer, kingpin, and transfer case.

Signs of a Worn Bevel Gear Set

A worn bevel gear first reveals itself by noise, as it handles the full torque going to the front wheels. Whistling or growling sounds that change with ground speed, especially when front-wheel drive engages, point to gear teeth or bearing issues. Clicking when engaging four-wheel drive can indicate excessive play. Metal particles found in axle oil during draining confirm advanced wear. Act quickly in such cases: chipped teeth can damage the differential and housing. The lifespan of a bevel gear relies mainly on maintenance: timely oil changes and proper fill levels help prevent premature tooth wear.

How to Identify the Correct Bevel Gear Before Ordering

• Brand, model, and serial number of the tractor.
• Brand and reference number of the front axle, found on the label or housing.
• Tooth count of the pinion and crown gear, often stamped on the crown gear.
• Reduction ratio, which must match the original.
• Diameter and spline count of the driveshaft fitting the pinion.
• Photos of the disassembled bevel gear set and markings.

Installation and Inspection of a Used Bevel Gear Set

Reassembling a bevel gear requires precise adjustment: pinion position, backlash, and bearing preload. Poorly set tooth contact causes rapid wear within hours of operation. Entrust this task to a qualified agricultural mechanic and replace worn seals and bearings during the service. Specialist in agricultural salvage and used parts since 1945, TMC Bejenne dismantles tractors across a 11-hectare facility in Naintré, supported by a stock of 25,000 references. Our technicians verify compatibility of each bevel gear set with your front axle before shipping. Quote available at 05 86 24 00 26.