Cracked crank threads...what do

[smcowboy1974]

If there's enough good threads left for the nut to fully thread onto the crankshaft with the flywheel installed i bet you could just run it.

That's what I'd do. It should be fine. Put it back together and run it.

 

[numnutz6383]

Could anyone tell me how pull the worm gear off the crank? Any OEM or homemade tools that can be used?

 

[Bob Hedgecutter]

Could anyone tell me how pull the worm gear off the crank? Any OEM or homemade tools that can be used?

From memory- 3/4 inch pipe fitting threads on- then you make provision for a centre bolt ground to fit the crank end- fashioned up as a puller- just like the Husqvarna ones.
Dont break the crank on that side as well though.

 

[numnutz6383]

From memory- 3/4 inch pipe fitting threads on- then you make provision for a centre bolt ground to fit the crank end- fashioned up as a puller- just like the Husqvarna ones.
Dont break the crank on that side as well though.

Searching around on the site revealed @Mattyo showing his DIY method here. I'll take great care not to crack this one too. I also confirmed that the flywheel nut threads just fine on the damaged crank.

I did obtain a crankcase, but I'm not sure about the integrity of it's bearings, so I'll try my hand with the original.

This will probably be a method I'll have to use to remove the pressed on worm on my Jonesred 910 project as well.

 

[Jay Hansen]

Searching around on the site revealed @Mattyo showing his DIY method here. I'll take great care not to crack this one too. I also confirmed that the flywheel nut threads just fine on the damaged crank.

I did obtain a crankcase, but I'm not sure about the integrity of it's bearings, so I'll try my hand with the original.

This will probably be a method I'll have to use to remove the pressed on worm on my Jonesred 910 project as well.

Searching around on the site revealed @Mattyo showing his DIY method here. I'll take great care not to crack this one too. I also confirmed that the flywheel nut threads just fine on the damaged crank.

I did obtain a crankcase, but I'm not sure about the integrity of it's bearings, so I'll try my hand with the original.

This will probably be a method I'll have to use to remove the pressed on worm on my Jonesred 910 project as well.

Here's a picture of the puller I made.

 

[Mattyo]

I think id opt for a used crank. So much easier to split the case...put new bearings in and toss in a better crank than to attempt a weld there.

 

[numnutz6383]

I think id opt for a used crank. So much easier to split the case...put new bearings in and toss in a better crank than to attempt a weld there.

Honestly, I'm a little intimated by this. I've never done it, I don't have a splitter, and I'm concerned I can't get OEM parts. I've gone as far as search for and put the AM bearings, splitting tool and case gaskets in my cart, but haven't pulled the trigger.