Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

McCulloch m3616 clutch won't release


Knuckles's Avatar
Member

Join Date: May 2011
Posts: 39
VT

07-10-11, 05:33 PM   #1  
McCulloch m3616 clutch won't release

The centrifugal clutch is stuck in the ON position. The chainsaw is only 2 years old and has been carefully used.

The weights don't moved with judicious rapping and tapping. There's no evidence of abnormal wear on the visible contact area inside the clutch drum, and can't see any rust or overheating.

I'm wondering if the central 2 eared cam has bound where it sits inside the weights, or if the bearing inside the drum has seized.

Don't want to pull this clutch apart unnecessarily. It all looks rather dry, should I try some penetrant first or will oiling affect the clutch ?

 
Sponsored Links
Knuckles's Avatar
Member

Join Date: May 2011
Posts: 39
VT

07-10-11, 05:37 PM   #2  
It's a chainsaw BTW - doh

 
Tolyn Ironhand's Avatar
Group Moderator

Join Date: Nov 2007
Posts: 11,819
MN

07-10-11, 07:21 PM   #3  
Does this run fine? If the clutch was locked up then the chain will spin all the time at all speeds, is this what it is doing?
If the chin will not spin then check the anti kickback guard and make sure it is not on.


Electrical AC/DC and lighting Moderator
Professional Electrician, Handyman, all around swell guy!
40,000 people die in auto accidents per year in the US. We should ban cars.

 
hopkinsr2's Avatar
Member

Join Date: Feb 2005
Posts: 1,561
Non-US

07-10-11, 11:46 PM   #4  
If the needle bearing siezes, the clutch will drive all the time.... You should pull the clutch apart to inspect it & if it is damaged, check the area of the crank where it rides for damage as well... Roger

 
Knuckles's Avatar
Member

Join Date: May 2011
Posts: 39
VT

07-13-11, 06:05 AM   #5  
Thanks for the replies. Yes the chain is always moving when the motor is turning, the CS runs and works fine otherwise , but dangerous.

No, not run with the brake on.

I won't be at the property where the CS lives for a month or so, have finished cutting and splitting for this Sthn Hemisphere winter, will pull the clutch apart later.

 
Knuckles's Avatar
Member

Join Date: May 2011
Posts: 39
VT

08-23-11, 04:36 AM   #6  
Got the clutch off with a little persuasion - the needle bearing had siezed onto the crank, fortunately no great damage to the needles or the shaft. After a good cleanout and a bit of grease the clutch is working perfectly.

Didn't see anything in the manual about oiling the bearing. Lesson learned.

 
Search this Thread