KNOWLEDGE BASE · 11 ARTICLES
Mechanical & electrical
Squeaks, springs, dampers, EMI and power — diagnosed from real tickets.
Mechanical
Squeaks, springs, dampers and wobbles.
PurrPRO FORMULA PEDALS
- Throttle squeaks / creaksTwo solutions fix nearly every case (in this order):
- A little play in the throttle damper — is it a problem?No. A small amount of play in the throttle damper is normal — even brand-new units have it, and it is not noticeable while driving. If the play feels…
- Magnetic Quick Pin (locking pin) keeps coming loose + squeakingApply PTFE Dry Lube on the pin and on the black bushing inside its socket. That restores smooth seating and stops the squeak-and-walk behaviour.
- Brake preload lock nut undoes itself / lost preloadThe shiny nut surfaces have little friction between them. Put a rubber o-ring (or rubber washer/band) between the two nuts to add internal pressure — they…
- A brake spring brokeExtremely rare (a single customer to date, diagnosed as fatigue failure — verified with photos of the crack and the spring stack). Support ships replacement…
- Damper knob / body is oilySome dampers arrive slightly oily from the factory (they ship in sealed bags from the supplier) — it does not mean a leak. Procedure from support: pull the…
- Pedal face wobbles more than it shouldCheck the small bearing in the ERGO-LINK rod end. A faulty rod-end bearing translates to increased wobble at the pedal face — easy to replace, and covered.…
- Throttle travel screw slips or sits crookedThe travel-adjustment screw mechanism needs the M4 snugged to 3 Nm with the slider square in its track, and the bolt head positioned outside the pedal…
Electronics & connectivity
Signal, power and interference.
PurrPRO FORMULA PEDALS
- Pedal signal jitters / oscillates in PurrOSWorked example from a real ticket: brake values oscillating wildly on the customer's PC but rock-solid on three of ours. Diagnosis path:
- One pedal completely dead (often after a power outage)Each pedal has its own 15 V DC adapter, and a surge can kill one silently. Checks:
- Which USB port should I use?USB 2.0, directly on the motherboard. Official guidance after several PurrOS 2.0 settings-sync reports: "make sure you are connecting pedals to a regular…
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