Nilfisk Traction Direction Control Fault

Self‑propelled machine moves only in one direction (forward or reverse) or jerks

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Faulty direction switch, Damaged traction potentiometer, Worn gearbox causing binding in one direction, Loose drive chain or belt

Safety first: Unplug the machine and secure it to prevent unintended movement.

Check direction controls: Test the forward/reverse switch or lever for positive engagement. Replace if loose or intermittent.
Inspect drive components: Check the drive belt or chain for correct tension and wear. Replace if stretched or damaged.
Test gearbox: Rotate the drive wheels by hand in both directions. If binding occurs in one direction, replace the Nilfisk traction gearbox.

Hard 4/5

Traction Gearbox

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