chain keeps falling off chainsaw?

mengele

I have an oleo mac that's about 10 years old. the chain lately keeps falling off it. I would be cutting lengths of timber and the chain could fall off and I end up taking it back to the dealer.

what could be up with it?

chuckyarelaw

Sounds like a loose rupture nut- or nuts.

rje66

mengele wrote: »

I have an oleo mac that's about 10 years old. the chain lately keeps falling off it. I would be cutting lengths of timber and the chain could fall off and I end up taking it back to the dealer.

what could be up with it?

Wear on the bar guides. Worn sproket. Too loose on bar.

rje66

mengele wrote: »

I have an oleo mac that's about 10 years old. the chain lately keeps falling off it. I would be cutting lengths of timber and the chain could fall off and I end up taking it back to the dealer.

what could be up with it?

Wear on the bar guides. Worn sproket. Too loose on bar.

My Potatoes

rje66 wrote: »

Wear on the bar guides. Worn sproket. Too loose on bar.

+1

monkeynuz

You have been taking it back to the dealer and he hasn't sorted it? Find another dealer.

CJhaughey

Check the chain tightness. When it is tight you should be able to pull it out of the bar to the height of the drive links.
Can you rock the chain side to side?
If it moves more than a few mm each way the bar groove is likely worn.
What do the drive links look like? are they all straight and not bent or nicked?
What does the bar nose look like? Running freely or not?
Does it need greasing? There is usually a hole for grease in the bar nose.
Post some pics if you can.

Mike83

Hope you have it sorted by now but might be worth having a look at the chain tensioner, had to replace one on a husky a while back.