Track rod ends on HGVs: failure, inspection, and replacement
Track rod ends are ball joint assemblies that allow the track rod to pivot as the wheels steer and the suspension moves. The ball pin runs in a socket and is pre-loaded by a spring. As the joint wears, the pre-load reduces and play develops. On HGVs, the loads through the steering system are much higher than on a car, so track rod ends wear faster and the consequences of delayed replacement are more serious.
DVSA annual test inspectors check for play in steering joints as part of the roadworthiness check. Excessive play at a track rod end is a straightforward failure. When fitting replacement track rod ends, the toe setting must be checked and adjusted afterwards. Always verify wheel alignment after track rod work on an HGV.
Frequently Asked Questions
How do I check for wear in a track rod end on an HGV?
With the front wheels on the ground, have an assistant move the steering wheel sharply left and right while you watch the joint for any visible play or lag. A better method is to raise the axle so the wheel is off the ground, grip the wheel at 9 and 3 o'clock positions, and rock it. Any play beyond the manufacturer's specified tolerance at the track rod end indicates replacement is needed.
Do I need to align the wheels after replacing a track rod end?
Yes. The toe setting must be checked after any track rod end replacement. Failure to check and adjust alignment after fitting will cause rapid tyre wear and may leave the vehicle outside roadworthiness tolerances.
Can I replace just the track rod end, or do I need to replace the full track rod?
In most cases the end can be replaced independently. Full track rod replacement is required when the rod tube is damaged, bent, or corroded beyond use, or when the assembly is supplied as a single unit.
Are track rod ends a common annual test failure point for HGVs?
Yes. DVSA inspectors check steering joints as part of the annual test. Excessive play at any steering joint, including track rod ends, is a failure reason. Regular inspection at service intervals keeps the vehicle compliant.
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