Engine running in vacuum
The engine goes up in speed, sharp noise, but nothing cycles: it no longer drives gears.
- Verifications
- 3
- Until
- Dismantling
- Tools
- 2
Symptoms
- Acute and regular engine noise, without piston (definition) noise
- A slam or squeal preceded the breakdown
- Sometimes the cycle resumes by pressing the handle
Causes
Most common to rare.
- Too remote motor: the pinion no longer touches the bevel gear (definition)Common
- Engine sprocket loose or with worn teethPossible
- Bevel gear with teeth tornPossible
Verifications
In the order: we start with what does not require anything to disassemble. Check as you go, the list is kept in this browser.
The adjustment screw could be unscrewed. Roll up the engine in small steps until you regain the cycle, then refine to sound.
Simple toolsTools: Allen keysEngine out, sprocket teeth must be clean. A pinion rotating on the axis or with rounded teeth replaces itself; its locking screw mounts to the thread brake.
Simple toolsTools: Allen keys, Precision screwdriverGearbox open: teeth ripped from the bevel gear often sign a poor motor setting or too loose shimming (definition). Correct the cause at the same time as the play.
DismantlingTools: Precision screwdriver
Stop
Stop and hand over the reply to a technician if:
- The bevel gear is hit: the gearbox is to be opened and scaled

