replacing chain sprocket

**mikecross23** · 04-25-2003, 07:15 PM

I'm trying to put a new chain sprocket and clutch drum on an Echo CS-3450 but can't get the old one off.

The local dealer showed me how to use a flat head and hammer to tap loose the clutch assebly. I can't get it to come off. It appears to be threaded on normal (R=Tight/L=Loose). Anyone have any suggestions for me? He was to busy to do it today.

Thanks,
-Mike-

**NevadaWalrus** · 04-25-2003, 07:32 PM

(W=Wrong) Chain saw clutch's are threaded backwards.

**mikecross23** · 04-25-2003, 07:48 PM

Originally posted by NevadaWalrus
(W=Wrong) Chain saw clutch's are threaded backwards.

Woops! This should be fun.

What's the ideal tool to knock it loose?

-Mike-

**mikecross23** · 04-25-2003, 09:33 PM

Thanks Brian. That worked right away!

-Mike-

**mbopp** · 04-26-2003, 09:06 AM

(W=Wrong) Chain saw clutch's are threaded backwards.

My old Homelite is right-hand thread on both the clutch and flywheel side.

**Kneejerk Bombas** · 04-26-2003, 03:16 PM

How'd they keep the clutch from spinning off during use?

**jokers** · 04-26-2003, 06:53 PM

I`ve found that if you have compressed air available, a pnuematic impact hammer fitted with a ripping chisel held with the shank parallel to the clutch face does a pretty good job of zipping them off. I ground one of the tips on mine square for better purchase when placed in the groove.
Russ

**NevadaWalrus** · 04-26-2003, 07:26 PM

mbopp, is your clutch spider keyed to the shaft and then held on by a retaining nut?

Jokers. I make clutch tools out of old sockets. I have an assortment of old sockets, you can pick them up cheap at the swap meet, I find the right size and set them down centered on the clutch spider. Mark the area I want jaws to set into the spider and then use the grinder to notch out the un-wanted material. They aren't pretty but with the rope stuffing the cylinder it makes removal and installation a lot easier without risking damage from a hammer and punch.

**TheTreeSpyder** · 10-02-2003, 04:24 AM

Originally posted by RockyJSquirrel
stick in a piston stop. If you do not have the rubber one, a used piece of your 8mm tres cord will work fine. Then turn the clutch clockwise (the same direction as normal chain direction) until the piston stops. THEN you can use your hammer and punch to smack the edge of the clutch to spin it off. I use an old prydriver for a punch.

Pretty sliiiiiiiiiick!

**cbfarmall** · 10-02-2003, 01:17 PM

So long as the saw has compression, you can rely on that to hold the crank still while you tap on the clutch. That's the only way I've ever removed a clutch.

Chris B.