Motorhome Electric Step Gear Repair

Step a bit clunky?

Recently while I was investigating a faulty step warning buzzer I discovered a number of the teeth on the gear that actuates the step were very worn, which explains the rattly operation and occasional jumping of the step as it goes up and down. Here’s how I repaired the gear for free with a mig welder and an angle grinder…..

For reference this is the type of electric step we have on our 1999 Hymer B544 mechanism, it is a simple unit that folds out from the trim under the habitation door:-

This is the worn gear, you can see the section where the teeth have almost completely worn away:-


First step was to build up the worn area with the mig welder (I am by no means an expert welder, so please forgive the state of the weld!):-

Next it is just a case of re-cutting the teeth with a plasma disc in an angle grinder. The step is not a precision piece of equipment so it doesn’t need to be especially accurate!

Then just a case of putting the step back together, as a Haynes manual would say ‘reassembly is the reverse of removal’ – good as new 🙂


UPDATE – Ron Bentham who runs the ‘Classic Hymers Technical’ Facebook group has been in touch to let us know that the Motor used on these steps is a part used on Land Rovers, if your motor fails and needs replacing you should be able to find a new one by searching for part number RTC 6640 – You can find Ron’s facebook group here:-


  1. If anybody needs to replace the whole motor, it is a window motor from Landrover (and many others) passenger side (RHD) – there are many part numbers but RTC 6640 usually brings up the most hits online. Cost from £25 s/h up to £70+ new(ish).

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