Heavy-duty trunnion (kingpin) for the steering knuckle on CAT backhoe loaders. It acts as the pivot axis in the front axle, carrying loads while ensuring precise steering. The kit includes a bearing and a seal for reliable operation in harsh job-site conditions.
| Brand | Model / Type |
|---|---|
| CAT | 414E; 416D / 416E; 420D / 420E; 422E; 424D; 428D / 428E; 430D / 430E; 432D / 432E; 434E; 442D / 442E; 444E; 450E |
For exact fitment, share your VIN/Serial and an axle tag photo (e.g., Carraro). We’ll confirm the configuration within minutes and supply the right kit.
The trunnion is the steering pivot. It ensures smooth, stable turning while carrying vertical and side loads. Wear increases play and affects steering safety.
Failure symptoms: knocking during steering, wheel play, front-end wander, uneven tyre wear, grease leak at the knuckle.
GX-AFTER is a quality aftermarket option engineered for OEM-like fit and durability — consistent tolerances, robust materials, reliable sealing.
Best confirmed by VIN/Serial and axle tag (e.g., Carraro). We’ll match the correct kit.
What’s included in the kit?Trunnion (kingpin) and bearing & seal.
When should I replace it?Knocking while steering, wheel play, front-end wander, grease leaks, or uneven tyre wear indicate trunnion/bearing wear.
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Load-resistant durability
Hardened steel & proper sealing
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CAT D/E fitment
OEM-like, no modifications
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Fast shipping EU/USA
Secure packing for heavy parts
Running a fleet or workshop? Send your VIN/Serial and axle tag photo — we’ll confirm fitment and prepare a trade offer today. Call us now.
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Swivel mounting pin complete with bearing and seal, suitable for CAT machines.

















