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Troubleshooting GuideWheel Flanges Wearing
Replacing the wheel is not a fix, it is a delay — look for the cause on the runway.
What the wear pattern tells you
If the flanges wear symmetrically, the runway span may be too narrow or too wide. If only one side and one direction is worn, the crane is consistently drifting that way; the cause is misalignment or a wheel diameter mismatch.
Wear concentrated in a particular section shows a local deviation in that part of the runway — usually at a rail joint or a settled support.
Possible causes
| Wear pattern | Likely cause |
|---|---|
| One side, one direction | Misalignment or wheel diameter mismatch |
| Both sides, inward | Span too narrow |
| Both sides, outward | Span too wide |
| Concentrated in one section | Local deviation, rail joint or settled support |
| Fast and even wear | Continuous skewing |
| Flange plus rail head | Advanced stage; runway overhaul is on the table |
Step-by-step diagnosis
- Record the wear patternWhich wheel, which direction, how much — document with photos.
- Inspect the rail surfaceLook for rail-head damage, level differences at joints.
- Measure the runwaySpan, level difference, straightness and rail slope.
- Measure the wheel diametersDetermine the diameter difference between opposite wheels.
- Check drive balanceMotor currents and brake timing.
- Draw up an alignment planDefine the scope of correction based on the measurement report.
- Plan the wheel replacementAfter alignment, assess the wheels as a set.
Why the cost grows
Continuing to run with worn flanges does not stay contained to the wheel. As friction increases, the travel gearbox and motor are strained, the rail head is damaged, and torsional stress builds up in the structure.
From that point the job shifts from a wheel change to a runway overhaul; the cost grows noticeably and the production stoppage gets longer. Early measurement is the cheapest fix.
Technical terms
| Term | What it means |
|---|---|
| Flange | The rim that keeps the wheel on the rail. |
| Rail head | The top surface of the rail that the wheel runs on. |
| Local deviation | A geometric defect in a specific section of the runway. |
| Alignment report | A document recording the measured deviations. |
Frequently asked questions
Can I switch to flangeless wheels?
Some applications use solutions with lateral guide rollers. The decision depends on the runway geometry and crane class; it is not suitable for every site.
How much wear is normal?
Some wear is unavoidable; the limit value comes from the manufacturer. What matters is the rate of wear: accelerating wear points to a geometric problem.