Husqvarna 266 clutch

[Captain Bruce]

Looking for the correct procedure to install a clutch, on a 266. This is the coarse thread 1/2" crankshaft...the clutch is closed, with a small hole drilled in the center. It doesn't tighten past the end of the crankshaft, it bottoms out. Piston stop in place, I tighten with a socket and handle. I have tightened it twice, and it has come off twice....... LOCTITE? Torque wrench?

 

[Bob Hedgecutter]

So, threads are worn stretched- or you just aint tight enough yet.
Tried the old up to full RPM and engage the chain brake method yet?

 

[Captain Bruce]

So, threads are worn stretched- or you just aint tight enough yet.
Tried the old up to full RPM and engage the chain brake method yet?

I was expecting an engineer with the proper torque value.......but this fellow tinker named it....al the same, I'd enjoy some other suggestions. I'm thinking the clutch to tightened as far as the crank will allow, yet not enough?

 

[singinwoodwackr]

All of here that I’ve seen are pooched out and cracked from being torqued down hard. I have several here…
Design flaw?

 

[Captain Bruce]

So, threads are worn stretched- or you just aint tight enough yet.
Tried the old up to full RPM and engage the chain brake method yet?

The threads are OEM. This is a new/2nd clutch. Wear/stretch requires extended stresses. The clutch threads, and crank threads have been cleaned, and Loctite applied. The clutch was held against a piston stop, and tightened with the proper tool. Lets see how that works out, tomorrow. Happy Beaver Moon

 

[ballisticdoughnut]

Looking for the correct procedure to install a clutch, on a 266. This is the coarse thread 1/2" crankshaft...the clutch is closed, with a small hole drilled in the center. It doesn't tighten past the end of the crankshaft, it bottoms out. Piston stop in place, I tighten with a socket and handle. I have tightened it twice, and it has come off twice....... LOCTITE? Torque wrench?

As I recall (I’ll double check service manual tomorrow at work) max torque on clutch is 29 foot pounds. Same for flywheel nut. If the hub is cracked it needs to be replaced. The threads on hub and crank must be absolutely clean and free of any debris/oil.

 

[singinwoodwackr]

As I recall (I’ll double check service manual tomorrow at work) max torque on clutch is 29 foot pounds. Same for flywheel nut. If the hub is cracked it needs to be replaced. The threads on hub and crank must be absolutely clean and free of any debris/oil.

I’ve always wondered about grinding 20-30 thousandths (or more) off the end of the crank to see it it would help.

 

[Bob Hedgecutter]

I was expecting an engineer with the proper torque value.......but this fellow tinker named it....al the same, I'd enjoy some other suggestions. I'm thinking the clutch to tightened as far as the crank will allow, yet not enough?

Clutch hub = 22-29ft-lb's if you need specific values.