Track shoes are replaced when grouser height or plate thickness reaches the wear limit for the machine class. Measure the wear on a schedule, and plan replacement around downtime before the shoes damage the chain. The measurement trend, not the hour meter alone, schedules the change, because ground conditions decide how fast a shoe wears.
Related reading: for shoe types, see our track shoe types guide, and for chain and shoe wear, see our chain and shoe guide.
How Grouser Height Wears and What Remains
Grouser height wears with every pass, and the bar that once gripped soft ground becomes a flat ridge. The remaining height is the measure of shoe life, and it is the first number to record at service.
In New Brunswick forestry and construction, abrasive ground wears grousers faster than the plate. Measuring height at service shows the real condition, and it separates a shoe that looks fine from a shoe that is nearly done.
Measuring Grouser and Plate Thickness
Measure grouser height and plate thickness with a gauge or caliper at the same points each time. Record the readings with the machine hours, because the trend between readings is what schedules the replacement.
Choose the measurement points once and write them down, so every service compares like with like. A measurement taken on a muddy shoe cannot be compared with one taken on a cleaned shoe.
Mark the measurement points on the shoe with paint or a scratch where the manual allows, so the next service finds them without a search. The marking makes the trend trustworthy and the reading fast.
Wear Limits by Machine Class
Wear limits vary by machine class and shoe size. Use the limits from the machine's service literature or the supplier's specification for your model, because a universal number will either replace shoes early or leave them on too long.
The limit is usually stated for both grouser height and plate thickness. Whichever number the shoe reaches first is the one that decides the replacement.
The Hour Meter vs the Measurement: Why Hours Alone Lie
Two machines with the same hours can wear shoes at very different rates, because ground conditions, speed, and turning habits do the wearing. The hour meter records time in service; the measurement records what the ground did to the shoe.
The measurement is the number to order from. A machine on abrasive fill can burn through a shoe set in a fraction of the hours that a soft-ground machine needs, and only the gauge knows the difference.
Consequences of Over-Worn Shoes
An over-worn shoe loses traction, and a worn-through plate can damage the chain link beneath it. Running past the limit turns a shoe replacement into a chain repair, and the machine loses the grip that keeps the work safe on slopes.
The visible warning is the shoe itself: a flat grouser, a thin plate, or a shoe that spins on hard ground. The invisible cost is the chain damage that starts under the worn plate.
The chain damage under a worn shoe is hidden until the shoe comes off, which is why the plate thickness reading is the one that protects the chain. A shoe measured at the limit is a shoe changed in the shop; a shoe measured after the chain jumps is a repair on site.
Replacing Shoes vs Full Undercarriage
Replace shoes alone when the chain, rollers, and sprocket are healthy. If the undercarriage is near the end of its life, replace the set together, because new shoes on a worn chain seat poorly and wear early.
The decision comes from the four-part inspection: chain pitch, roller readings, sprocket profile, and shoe wear. When three of four are near the limit, the full set is the cheaper job.
The set decision also belongs on the order sheet: a full undercarriage order with one serial number and one delivery window is a single planning event, while separate orders become separate stops. The planning saving is part of the cost comparison.
Planning Shoe Replacement Around Downtime
Order replacement shoes with the part numbers confirmed before the wear limit, and schedule the change for a maintenance stop. A planned shoe change takes hours; an on-site failure takes a day.
For a New Brunswick forestry machine, the shoe order should land before the wet season raises the wear rate. The trend tells you the month, and the parts confirmation tells you the delivery window.
Confirm the shoe count and hardware with the order, because a partial set discovered at the stop costs the same day as a failure. The complete order is what makes the planned stop a plan.
A Shoe Wear Log: Readings That Schedule the Replacement
A shoe wear log is a two-column record that turns measurements into a replacement date. The table below shows the fields to keep per machine, and the trend column is what the next service reads.
| Log field | What it records |
|---|---|
| Date and machine hours | Puts the reading on a timeline |
| Grouser height | The traction measurement |
| Plate thickness | The structure measurement |
| Measurement points | Keeps readings comparable |
| Next-service note | Schedules the follow-up check |
The log works because it is read, not just kept: the next service starts with the previous readings and compares against them. A machine with three readings on the sheet is a machine whose replacement date is already known.
Forestry vs Construction Wear: Reading the Site in the Shoe
Forestry work wears shoes differently from construction: stumps and slash hammer the grouser, while abrasive fill wears the plate and the bar together. Reading the shoe tells you which site pattern is driving the wear.
A forestry shoe shows chipped grousers and impact marks; a construction shoe shows a smooth, worn plate. The pattern decides both the replacement timing and whether the shoe specification suits the site.
AFT Parts Expert Views
"Shoe wear is the most visible part of the undercarriage and the easiest to measure. Across the machines we support, those that run shoes past the limit lose traction first and damage the chain later — a worn-through plate is a chain repair waiting to happen. Measure grouser height and plate thickness at every service, record the readings with the hours, and order from the trend. Replace the shoes before they damage the chain, and plan the change around downtime." — AFT Parts Technical Team
Conclusion
Track shoes are replaced when grouser height or plate thickness reaches the limit. Measure on a schedule, order from the trend, and plan replacement around downtime before the shoes damage the chain.
Key Takeaways for Canadian Operators
- Measure grouser height and plate thickness at every service.
- Use the wear limits for your machine class.
- Order replacement shoes before the limit is reached.
- Plan the change for a maintenance stop, not a failure.
See the Track Shoe collection and the 1V4615 track shoe for your machine.
Frequently Asked Questions
How do I measure track shoe wear?
Measure grouser height and plate thickness with a gauge or caliper at the same points, and record the readings with the machine hours.
What happens if shoes are worn too thin?
An over-worn shoe loses traction and a worn-through plate can damage the chain link beneath it. Replace before the limit.
How long do track shoes last?
Life depends on ground conditions and machine weight. Abrasive ground and heavy loads shorten life; measure the trend rather than relying on hours alone.