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Used Rear Axle Kingpin

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The rear axle kingpin is a key component of your tractor's steering system. Excessive play or difficulty turning indicates it’s time to replace it. TMC Bejenne offers a wide stock of used kingpins for tractors of all brands — Massey Ferguson, John Deere, Ford, Landini and many more — sourced from dismantled and carefully inspected tractors.

What is a tractor's rear axle kingpin?

The kingpin is the pivoting part that connects the tractor's chassis to the front wheel spindle. It serves as the rotation point around which the steering wheels turn when steering. Without it, the tractor cannot be steered.

Rear axle kingpins link the chassis to the front wheels, enabling smooth and precise movement. They play a vital role in maneuverability: the rear axle kingpins and steering rods provide accurate and responsive steering.

On 4WD tractors, the kingpin is more complex as it must allow wheel steering and transmit torque from the rear axle. It usually includes a tapered bearing, sliding bushings, and seals. On 2WD tractors, the design is simpler: the kingpin is a cylindrical shaft articulated in a housing on the front chassis, with no power transmission.

The role of the kingpin in the steering system

The kingpin is constantly under load whenever the tractor is in motion. It bears the weight of the tractor’s front (static load) and absorbs shocks and vibrations from the terrain (dynamic load). At the field edges, during tight turns under full load, the stress on the kingpin is particularly high.

Maneuverability, stability, and traction are the three functions the rear axle components must jointly ensure. Regular maintenance is essential to extend tractor lifespan and prevent failures.

Regular lubrication of the kingpins is the key to longevity. Greasing the pivot points reduces friction. A poorly lubricated kingpin wears quickly: contact surfaces become scratched, play develops, and steering loses precision.

Buying used agricultural equipment: why choose TMC Bejenne?

Buying used agricultural parts privately (ads, specialized platforms) may offer low prices but lacks guaranteed compatibility or technical inspection. For a safety-critical component like the kingpin — directly involved in tractor steering — part reliability cannot be left to chance.

At TMC Bejenne:

  • Each kingpin is taken from an identified machine (brand, model, year)
  • Systematic dimensional and visual inspection by our technicians before stocking
  • Catalog reference tracking to avoid compatibility errors
  • Stock of over 15,000 references available immediately
  • Shipment within 24 to 48 hours for available parts
  • Telephone advice: our advisors confirm compatibility with you before shipping

A subsidiary of the Dubreuil Group, TMC Bejenne brings together over 80 years of expertise in used agricultural parts.

The kingpin is the pivot component of the rear axle that enables the steering wheels to turn during steering. On 2WD tractors, it is a simple shaft. On 4WD tractors, it also includes sealing elements for torque transmission to the front wheels. Its wear manifests as play in the steering and noises when turning.

Lift the tractor front with a jack and apply lateral movement to the wheel. Play detectable at the rim (usually beyond 2-3 mm) indicates kingpin or bushing wear. Other signs include knocking noises when turning, vibrations in the steering wheel, or oil leaks near the spindle (4WD tractors).

Yes, provided it comes from an inspected machine and is identified with its manufacturer reference. For a steering part like the kingpin, dimensional and visual checks before installation are essential. At TMC Bejenne, this verification is systematic.

Provide the exact brand, model, year, and if possible the manufacturer reference or serial number. For 4WD tractors, also specify the front axle manufacturer (ZF, Carraro, Dana, etc.). Our advisors will match this information with our stock.

The kingpin is the pivot shaft that allows the steering movement. The spindle is the part where the wheel hub is mounted. They are mechanically connected but distinct and separately replaceable depending on the model.

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