New Member from SE PA with a 124.

[David Middleton]

Mic'd the bore... 3.5166"on the high side. Other parts of the bore were 3.5132". So it exceeds max out of round, max taper and overall bore for 10 over.

Looks like I'll be going 20 over...

 

[RAllison]

Yep

 

[David Middleton]

I win...



Ended up drilling them out. I got an 1/8" and 3/16" left hand bit but they just ended up drilling through and never grabbing. So I went through with the #7 and retapped the holes. Well two anyway. I was able to knock it off without drilling the last one all the way out and now I'm going to put it in the drill press to drill out and tap just like the others.

Does the end of the crank look funny? It looks like someone put the pto together wrong and it was hitting the crank and it's just galled up, but it's really rough.

 

[RAllison]

Almost looks mushroomed like it was beat on

 

[RAllison]

Or a puller

 

[David Middleton]

Almost looks mushroomed like it was beat on

You know what? I think you're right.

I got the bearing off and the crank looks like someone "smoothed" it out with a grinding wheel... Oh well... It should still be serviceable.

My next thing is the bearing in the case is stuck to the crank and I can't get it out with the cam in there and the cam can't come out with the crank in there.

I think I'm going to bring out the oxy-acl torch tomorrow and see if I can heat the race up to get it to expand.

 

[RAllison]

If it will tap back towards the motor,see if you can clean any burrs off the end of the shaft

 

[mgwin]

I second what Kraig said.
Also, make sure you have good crisp edges on the allen wrenches. Any rounded edges on the allen wrench will be sure to strip out the head in the set screw.

 

[jkoenig]

Good job David!

 

[PACub100]

If it will tap back towards the motor,see if you can clean any burrs off the end of the shaft

Yes, definitely try this first.
I tried finding some info on the cranks but couldn't find anything quick about hardness. Using a torch to heat up the area could weaken the crank...

 

[RAllison]

Ohhhhhh,I see he got the pto bearing off,he's working on a seized up crankshaft bearing. Seems to me if I remember right I got that camshaft out first,maybe I'm wrong

 

[RAllison]

Yeah,I think I'm wrong