Echo question

[a. palmer jr.]

I'm working on another CS4600 and am checking in with you Echo experts about a worm gear for the automatic oiler. I ordered one and assumed it would be plastic which it is not, it's brass and appears a mite too small to fit on the crank and it doesn't seem to mesh into the other gear very far. I assumed I will have to heat the brass gear to expand it. Am I correct about this? The gear part number matches the one on the IPL.

 

[Edge & Engine]

What material was the original worm gear? The bronze worm is a press fit. Echo has a special tool for installation.

 

[a. palmer jr.]

I don't know. I bought it from a shop nearby and the worm gear was missing. The owner of the shop didn't know anything about it except that it wouldn't oil. I went ahead and heated it up slightly and pressed it on and it seems okay. Haven't got the saw back together yet, still cleaning up a few things.
The only thing I can figure is that the original worm gear must have been chewed up if it was plastic and they threw it away. Other than that I can't see why it wasn't oiling. I'm cleaning all the oiling system so that won't be the problem.

 

[Giles]

I'm working on another CS4600 and am checking in with you Echo experts about a worm gear for the automatic oiler. I ordered one and assumed it would be plastic which it is not, it's brass and appears a mite too small to fit on the crank and it doesn't seem to mesh into the other gear very far. I assumed I will have to heat the brass gear to expand it. Am I correct about this? The gear part number matches the one on the IPL.

I've never had to use heat but made a special puller to remove. It would help to heat slightly to remove and reinstall, without a puller, just be sure to install the new one at the same spot on crank--don't remember if it just bottoms out.

 

[Edge & Engine]

Just make sure the gears mesh evenly. Some early saws had a different tooth count (steel worm), and when replacing the worm gear, the pump gear had to be changed as well. But most likely it was a plastic gear.

 

[WSE]

I've replaced very few of these but as I remember I think I stuck the saw in the freezer to shrink the crank down and then heated the gear with a heat gun.

 

[a. palmer jr.]

I went out to the frozen shop and finished the saw today. Started it up and it ran and oiled the bar very well. Sharpened the chain while I was out there. I think it may be a pretty good saw, I'll try it out next time I get some wood to cut that doesn't have that white stuff all over it. Supposed to snow again tonight so doubt I'll be out there. Thank you for your replies..