3120xp with 36" bar makes strange noise at the sprocket

[awhitaker]

Bought a fairly new 3120Xp with no bar at a good price to use as a milling saw. Got a 36" bar and chain put them on and tried to run the saw on the mill today. After getting the bar and chain on ran it and it has a strange whining sound coming from the sprocket/clutch. Spun the chain ok so I put it on the mill. Tried to do a cut and it wouldn't turn the chain in the wood. Took it out of the mill and it wouldn't turn the chain. Tension seemed ok, not too tight nor loose. Took the chain and bar off and it would run good and clutch/sprocket turned. Upon inspecting the chain and bar, the chain has a couple of drive links blued from heat and tips slightly upturned. The bar at the bottom end shows to have gotten hot. Question is, what is going on? Not adjusted correctly? Sprocket has 7 slots so I'm assuming .404 and that's the chain I'm using. Also have a new .404 sprocket that I can put on it. But the whining noise, any ideas? I'm not a novice at chainsaw use, but never used anything this big. I'll take any help you offer!

 

[Sierradmax]

Are the bar and chain of the same gauge & pitch? Does the sprocket move freely? Does the saw run WOT when on wood but not turning the chain? Or does it bog down like it's restricted? Perhaps the "fins" on the clutch drum are worn out and the rim sprocket engages at idle but cannot under load.

 

[nstueve]

Is the bar and chain used? Check bar and chain to make sure they aren't bent or twisted making the chain bind. Also check clutch springs and drum bearing.

 

[nstueve]

Are the bar and chain of the same gauge & pitch? Does the sprocket move freely? Does the saw run WOT when on wood but not turning the chain? Or does it bog down like it's restricted? Perhaps the spurs on the clutch drum are worn out and the rim sprocket engages at idle but cannot under load.

fixed that for you.

 

[awhitaker]

Are the bar and chain of the same gauge & pitch? Does the sprocket move freely? Does the saw run WOT when on wood but not turning the chain? Or does it bog down like it's restricted? Perhaps the "fins" on the clutch drum are worn out and the rim sprocket engages at idle but cannot under load.

Yes, bar and chain same gauge and pit

Are the bar and chain of the same gauge & pitch? Does the sprocket move freely? Does the saw run WOT when on wood but not turning the chain? Or does it bog down like it's restricted? Perhaps the "fins" on the clutch drum are worn out and the rim sprocket engages at idle but cannot under load.

Same gauge and pitch. Sprocket moves freely. Didn't try on wood and the saw didn't act to bog down. I just put a new sprocket and drum on and tried it in wood and it worked but still makes the noise like the chain is too tight. Even with the chain loose, it still makes that noise. And it doesn't free-spin much when I release the throttle.

 

[awhitaker]

Is the bar and chain used? Check bar and chain to make sure they aren't bent or twisted making the chain bind. Also check clutch springs and drum bearing.

Everything is new............

 

[Marshy]

Mount the bar and chain without the sprocket cover, just use the bar nuts directly on the bar. Set the chain tension and spin the chain by hand to check for binding of the chain. If there is none after rotating through the entire chain then start the saw and blip the saw and watch. You might need something to take up the space that the clutch cover would take...

 

[tacomatrd98]

Not trying to insult your intelligence but make sure the chain is actually on the sprocket and not down beside it between the rim and the drum. I have seen this quite a few times on used saws. It will spins the chain a little bit with no load but make a weird sound but it just slips if you would actually try to cut like that.

 

[Marshy]

Not trying to insult your intelligence but make sure the chain is actually on the sprocket and not down beside it between the rim and the drum. I have seen this quite a few times on used saws. It will spins the chain a little bit with no load but make a weird sound but it just slips if you would actually try to cut like that.

And it would blue only a few links where it was slipping enough.

 

[Oleo-Mac 999]

So? the machine is already working perfectly? and some pictures of the chainsaw to help you understand the problem, it would be better?

 

[blsnelling]

Is it oiling correctly?