Why Does My Excavator Keep Throwing a Rubber Track?

A rubber track that repeatedly comes off is not simply an inconvenience. It usually points to a problem with tension, undercarriage condition, trapped material, operating technique, track damage or fitment. Putting the track back on without dealing with the cause can lead to another failure and may damage the sprocket, rollers, idler or track itself.

If replacement is required, PartsForMachines offers over 30,000 rubber track references. Customers can search by machine model or by track dimensions, including width, pitch and link count. When identification is uncertain, photographs of the machine plate, track markings and undercarriage can help the team narrow the options.

Start with the Track Tension

Track tension controls how the belt sits around the sprocket, rollers and front idler. If the track has too much slack, it can move sideways or climb away from the running gear during a turn or when the machine reverses. Making the track excessively tight is not a safe correction because the additional load can accelerate wear throughout the undercarriage.

The correct sag and the way it is measured vary by machine. Use the operator or service manual for the exact model and serial range. Do not copy a measurement from another excavator or set tension by appearance alone.

Look for Material Packed into the Undercarriage

Mud, clay, gravel, wire and broken stone can collect around the sprocket, rollers, idler and track frame. As the track moves, this material can alter the way the belt runs and interfere with sprocket engagement. Hard objects can also damage the internal lugs or edges of the track.

Clean the undercarriage regularly when working in sticky soil, rocky ground, demolition material or freezing conditions. If material is firmly lodged, stop the machine and remove it safely rather than trying to drive it out.

Check the Sprocket, Rollers and Idler

A rubber track relies on the rest of the undercarriage to keep it aligned. Hooked sprocket teeth can engage poorly. A seized, loose or badly worn roller may stop supporting the track correctly. Problems with the front idler, tensioner or track frame can also let the belt wander.

Inspect the system as a complete assembly. A replacement track fitted to defective running gear can wear quickly and may come off for the same reason as the previous one. Relevant replacement components are available through the PartsForMachines Under Carriage category.

Review How and Where the Machine Is Turning

A tight turn applies sideways force to the track. On concrete, asphalt or other high-grip surfaces, a pivot turn can make the belt scrub heavily while the machine rotates. On broken ground, the same manoeuvre can push the belt away from the rollers or idler.

Use smoother, wider turns where the working area allows. Pay particular attention when changing direction across a slope or when moving between sloping and level ground, because the undercarriage may not be supported evenly.

Inspect the Rubber Track for Structural Damage

Examine the outer tread, both edges and the internal lugs. Torn or missing guide lugs, exposed reinforcement, deep cuts, separation of rubber layers or a distorted carcass can prevent the track from running correctly. A damaged track should be assessed before it is refitted.

Confirm That the Track Is the Correct Fit

Tracks that look similar are not necessarily interchangeable. Width, pitch and link count must match, but the internal guide arrangement and any directional tread also matter. Check the machine details and the markings on the original track before ordering.

What Should Be Checked After a Track Comes Off?

Before the machine returns to work, inspect:

• the tread, edges, carcass and internal guide lugs
• sprocket teeth and the way they engage with the track
• top and bottom rollers for seizure, play or visible damage
• the front idler and the movement available to the tensioning system
• the track frame for damage or misalignment
• mud, stones, wire and other material trapped in the undercarriage
• the opposite track for useful wear and tension comparisons
• the replacement track’s dimensions and running direction

If the reason is still unclear, tightening the track further is not a diagnosis. Arrange a proper inspection before continuing to operate the machine.

Can I Put a Thrown Track Back On Myself?

Track refitting can involve supporting heavy equipment, handling a heavy flexible belt and working with a pressurised tensioning system. Use the manufacturer’s instructions and suitable equipment for the exact machine. General online advice should not replace the approved service procedure.

How Do I Find the Correct Replacement?

Record the machine manufacturer, full model and serial details. Then locate the track marking or measure the width, pitch and total number of links. Also photograph the complete track, tread pattern, internal lugs, sprocket and machine identification plate.

Browse the Rubber Track range, or contact the PartsForMachines team by WhatsApp, telephone or email for additional identification support. PartsForMachines can use the machine information and track dimensions to search over 30,000 rubber track references.

Rubber Track Applications

The range covers supported compact plant and tracked equipment. Examples include replacement-track listings for the Kubota KX016-4 and Takeuchi TB235. Always confirm the exact machine and track specification before ordering.

Eligible purchases are supported by the PartsForMachines Fit Guarantee and hassle-free returns. Delivery is available across the UK and Europe, with international shipping to supported destinations. Check the relevant product page for the applicable manufacturer warranty and delivery details.

Frequently Asked Questions

Is it normal for an excavator to lose a rubber track?

No. Difficult ground can contribute to an isolated incident, but a track that comes off repeatedly needs investigation. Check track tension, trapped material, undercarriage wear, track damage, alignment and fitment.

Can low track tension cause de-tracking?

Yes. Too much slack can reduce the track’s control around the sprocket, rollers and idler. Set tension only by the procedure and measurement specified for the exact machine.

Can mud or stones make a rubber track come off?

Yes. Material packed into the undercarriage can disrupt alignment and sprocket engagement. Stop the machine safely and remove the obstruction before resuming work.

Why does a rubber track come off when turning?

Tight turns push the track sideways and make it scrub against the ground. De-tracking becomes more likely when the track is loose, damaged, incorrectly fitted or running on worn undercarriage components.

Does a thrown rubber track always need replacing?

No. Replacement depends on the track’s condition. Inspect the carcass, edges, reinforcement and internal lugs, and check the complete undercarriage before deciding whether the track can return to service.