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Sprocket Replacement
Drive Sprocket Essentials
Drive sprockets are exposed to extreme heat and friction which causes extra wear to the
sprocket. A worn drive sprocket will damage and weaken the chain beyond repair, which in turn
causes loss of power and greater guide bar wear.
Victa recommends changing the drive sprocket everytime the chain is replaced.
To help avoid drive sprocket problems;
* Ensure replacement sprocket is the correct pitch.
* Keep chain correctly sharpened and tensioned.
* Ensure bearings are adequately lubricated to reduce friction.
* Keep guide bar rails well maintained.
* Ensure a good oil flow over bar and chain.
* Never fit a new chain to an old sprocket, when ever a new chain is fitted a new sprocket
should also be fitted.
Replacing the Sprocket
1. Release chain brake to allow clutch to run free from chain brake clamp - ensure spark plug cap is
removed before commencing maintenance.
2. Remove bar tension housing - remove both nuts.
3. Remove chain and bar from unit.
4. Remove clutch - using a impact drill and specialized 3 pronge socket piece - clockwise.
5. Replace sprocket - ensuring the correct pitch sprocket is used to replace old sprocket
- Inspect and replace clutch cup if drive teeth a worn.
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