Abnormal earbox noise
Grinding, rattling or crackle noise that did not exist before.
- Verifications
- 4
- Until
- Dismantling
- Tools
- 3
Symptoms
- Crecell noise or grinning at each cycle
- Unusual vibrations in the handle
- The sound of the shooting changed after a dismantling
Causes
Most common to rare.
- Engine height not adjustedCommon
- Shimming (definition) too loose or too tightPossible
- Used gears or padsPossible
- Lack of fatPossible
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.
It is the most frequent and simple cause to correct: small guts, shooting at once, to the most clear sound.
Simple toolsTools: Allen keysA cross engine in the handle loads the pinion on one side: asymmetric wear and noise. His holding plate must hold him without play.
Simple toolsTools: Precision screwdriverGearbox open: normal wear polishes teeth, abnormal wear breaks them. A cushion that has taken play in the hull replaces itself, often with bearings.
DismantlingTools: Precision screwdriverSide play barely perceptible, free hand rotation, thin layer of fat on teeth.
DismantlingTools: Precision screwdriver, Gearbox fat
Stop
Stop and hand over the reply to a technician if:
- The noise is accompanied by a loss of cycle: a gear may be breaking

