Mcculloch crank bolts socket

[Honest John]

How the heck do I get these things off ? I think this is a usable piston an cylinder for an SP125 but I can't get these off to check. I tried a 6mm socket and it strips. Same thing with the standard equivalent.

 

[Rob Stafari]

Looks like you need a spline socket of sorts.

 

[Adirondackstihl]

@Lee H

 

[Adirondackstihl]

@heimannm

 

[Honest John]

Got pissed and got the cutting wheel out. I win b**tch !

 

[Chainsaw Jim]

John I wish I had seen this sooner because I have one.
What are your plans with that thing? I'm interested if you're not planning on keeping it.

 

[WOODS]

I hope you don't need the rod bolts. It is easier to find the proper wrench or socket than the bolts. In fact, I have never seen any of these bolts listed for sale. McCulloch spline wrenches and sockets come up fairly frequently though I didn't find any moments ago. I think they are commercially available as well if you know the right size. Ron

 

[Honest John]

I hope you don't need the rod bolts. It is easier to find the proper wrench or socket than the bolts. In fact, I have never seen any of these bolts listed for sale. McCulloch spline wrenches and sockets come up fairly frequently though I didn't find any moments ago. I think they are commercially available as well if you know the right size. Ron

All the guys I've talked to replace them with Allen head screws or something easier.

 

[Honest John]

John I wish I had seen this sooner because I have one.
What are your plans with that thing? I'm interested if you're not planning on keeping it.

'tis for sale Jim.

 

[WOODS]

All the guys I've talked to replace them with Allen head screws or something easier.

Don't know the details but am told these have higher torque values than grade 8 socket heads which is why MAC specified them. Also read that MAC says not to reuse but since NOS are unobtainable, they are reused. Ron

 

[Chainsaw Jim]

'tis for sale Jim.

PM sent

 

[Lee H]

You do need the special socket for the original Mac bolts. New nos bolts can be had as I have
found a few on ebay and keep a couple sets in stock. Terry Ives in Ca. uses allen head screws
with what he says better results as they don't break like the Mac bolts, But he is in the karting
world not the chainsaw world we are in. Not sure which screws he uses as I have never needed
them.

 

[Al Smith]

A socket head grade 8 will hit the stuffer .It's a 10-32 bolt by 5/8" .

I thinned grade 8 socket heads in the lathe so they would fit .A low head or button head has a one size smaller allen wrench size and would strip out about the the time you got it to torque .for me it worked but I now have a splined socket .I'm not so certain a good grade of sockets heads have less strength than the McCulloch bolts .I used Hollow Chrome brand which I think is 120 thousand PSI .Where the idea ever came from that McCulloch had super bolts I'll never know .Another urban legion perhaps ?

 

[Al Smith]

More on that .What I did was thread a piece of 3/4" rod stock to thread the bolt in to be able to turn it .Then I cut the head down to the size of the spline bolt and left a flange at the bottom .I used these on one model 125 and sent a set to a guy in Mississippi .