How much heat?

   / How much heat? #1  

tow653

Gold Member
Joined
Apr 27, 2012
Messages
331
Location
Gasconade County,Mo
Tractor
New Holland TC29,Ford Jubilee
Went to change the blades on a Wood RM600 rear finish mower today and couldn't break the bolts that hold blades on with a 3/4" breaker bar,socket slipped. How much heat can I apply to bolt to loosen without seals? Thanks,
 
   / How much heat? #2  
The blade bolts don't have seals so no worry there.

Heat the nuts to dull red and use a good air impact wrench. They will spin right off. But....don't pick them up right away. :fiery:
 
Last edited:
   / How much heat? #3  
Are you sure the bolts are not left hand threads ? Fought the very same problem on a finish mower until I figured it out. An impact will be a lot easier if you have one. Good luck
 
   / How much heat?
  • Thread Starter
#4  
Yes they are left hand threaded ,but knew that and was going correct direction,only have an electric impact wrench,will give it a try.
 
   / How much heat? #5  
You may not have a impact wrench strong -- My 1/2 inch snap on with a huge compressor wouldn't budge it; Moved up to a inch gun and it had to beat on it a while till it moved...
 
   / How much heat? #6  
I've always found penetrating oil overnight then heat will break most anything. Of course, unless I'm twistin' the wrong way.
 
   / How much heat? #7  
couldn't break the bolts that hold blades on with a 3/4" breaker bar,socket slipped.

What do you mean the socket slipped? Have you already rounded the corners on the bolt? Are you using a good quality 6 pt socket? Whatever is tightest fitting, standard, or metric? I've driven sockets onto badly rusted nuts or bolts before.

Are these nuts or bolts?
Wouldn't heating a bolt to red hot, then spinning it off... only spin half of it off... with very much undesired results. :confused:

Typically one turns the bolt/nut in the direction of the cut to loosen the bolts, and opposite of the direction of the cut to tighten.

Removing Mower Blade.gif

When all else fails, try a bigger wrench.
 
 

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