Stihl 029 unwanted chain tightening

[TylerFarmallH]

Hey Guys,

I have a stihl 029 saw, the chain is tightening after about 4-6 cuts and I have do dissamble the bar and chain and re adjust. I have replaced the bearing and sprocket and still no change. The bar and chain look fine but I guess I'll replace that next? any thoughts?
 

[Zachary Hoyt]

Does your saw have a screw to adjust tension or is it one of those
new auto-tension devices?
Zach
 

[TylerFarmallH]

It has a screw so I will adjust it to pull loose but still in bar and after some cuts it has no slack at all.
 

[oldhippy]

your oiler isnt working right
 

[t.r.k.]

I think your oiler is not working too.

Our old McCullochs used to do that a lot, but it was insufficient oil, the bar would overheat and expand, binding the chain.
 

[Zachary Hoyt]

To check if it is getting oil point the bar at a cut log end or other
white surface and run at full speed. Within 5 seconds you should
start to see oil splatter, within 15 seconds you should have a nice
dark line of oil.
Zach
 

[Jack345]

On bottom of saw you will see a hole for adjusting oil flow-arrow points to direction of max flow.
1.Adjust for max flow (check manual)
2.With bar and chain off saw start saw rev up and and you should have oil flow.If not check oil pump.
3.Make sure clutch drum is in place when running engine.Clutch drum drives oil pump ( the long wire fits in the notch on clutch drum which drives oil pump.Oil pumps do go bad.
4.If you have oil the bar oil port hole could be plugged.Clean.
 

[onefarmer]

When I saw the title of this post I was going to say the sprocket needs replaced. But you say that was done. So I'm thinking lack of lube.
 

[timcasbolt]

Yea, no doubt about it, you've got an oiling problem.
 

[36 Coupe]

Take the bar and chain off and check oil flow.Why would you replace the bar and chain?Did you put oil in the oil tank?
 

[Bret4207]

Okay, how are you adjusting the chain? You say, "the chain is tightening after about 4-6 cuts and I have do dissamble the bar and chain and re adjust." Are you taking the saw apart to adjust the chain? All you do is loosen the bar nuts slightly, just enough to let the bar move a tiny bit, PULL UP ON THE BAR and adjust so the chain is properly tightened. If you pull up n the bar and adjust so the chain is free moving but with no real slack you should be good to go. I've seen a lot of rigs with the chain running way too loose and way too tight. And if you don't pull up on the bar a bit and tighten the bar nuts good it'll move on you. It'll get tighter if you didn't pull up on the bar and get the nuts tight.

Also, if all this is correctly done and you still have the issue it can certainly be oiling. Some times you need to enlarge the oil hole in the bar a size or 2. And you are cleaning the bar groove and oil hole, right? All common issues.
 

[Ellis Kinney]

Most chain saws also have a small hole to grease the roller nose. Ellis
 

[TylerFarmallH]