Main bolt replacement

   / Main bolt replacement #1  

TomIre

Gold Member
Joined
Apr 5, 2018
Messages
326
Location
College Grove, TN
Tractor
Branson 3725
Is the "bolt" (it's threaded anyway) that supports the main weight bearing arm of the three point linkage or the back hoe a stock item somewhere or is it Brandon/model specific?
I went to put on my bush hog and noticed something was off. Turns out the lock washer and nut we're gone from one of the bolts. The threads were buggered from rubbing so I can't just replace the nut. Checked TSC and they didn't seem to have anything. I can check the local co-op and there is a general tractor repair shop nearby but neither will be open until tomorrow.
Photos show the messed up one near the intact one that is in place.
TIA for any assistance!
IMG_20181014_171852509.jpg
IMG_20181014_171905862.jpg
 
   / Main bolt replacement #2  
I doubt that would be an "off the shelf" bolt anywhere. That being said, a local machinist should be able to make you one, since you have the old one for a pattern.
 
   / Main bolt replacement #3  
It looks like those threads might roll back with a thread chaser, even compromised the application doesn't rely on tension, it's pretty much just to keep it in place.
A big fastener store might be able to chase it, or at least you could get another nut to file grooves in to make a chaser.
That's if the special bolt is ridiculously expensive or continents away, of course.
 
   / Main bolt replacement
  • Thread Starter
#4  
It's definitely just to keep it in place. I thought about trying to "fix" it but not sure how to start.

Surely a manufacturer 's replacement part would be cheaper than machining a new one? I'd guess it would be standard across a range of their tractors. The 25 series at least.
 
   / Main bolt replacement #5  
It looks like you could fit in a normal bolt with an appropriate size bushing (pipe) over it, sort of like a Cat 2 to a Cat 1 Lift Arm Bushing I use.

268454


Now I warn you, these are expensive $2.29@ but you might be able to fashion a piece out of some thin pipe.
 
   / Main bolt replacement #6  
As FD said, clean up the threads and use a flat washer and a locknut or even some blue Loctite. I despise lockwashers, they break and don't do nuttin. Another option would be a castellated nut but you'd have to drill a cross hole in the end thru the threads.
Another option would be to rethread it a smaller size..............Mike
 
   / Main bolt replacement #7  
I'd take it to the tractor places mentioned. If they don't have it, try a truck/diesel shop. Then maybe some place like Fastenal or other fastener suppliers.
 
   / Main bolt replacement #8  
An easier and cheap fix would be getting a shaft with the proper diameter and put to cotter pins on each side. Or weld a washer on one end and a pin on the other.

Another idea, if you have that tools for that, would be cut the thread portion off, drill and thread a hole and just use a bolt and washer.

Anyway, the bolt and bushings idea is also nice. That's probably metric, so keep that in mind.

That would could easily be done by a machinist, but since it's just one, the price will be really high.
 
   / Main bolt replacement #9  
An easier and cheap fix would be getting a shaft with the proper diameter and put to cotter pins on each side.

That's how my BH and FEL attach, but there is a keeper pin on one end that drops into a ring welded on the frame. Kind of hard to see in the BH Pin picture, but you can see it better in the FEL Pin picture below:

BH Pin.jpg
FEL Pin.jpg
 
   / Main bolt replacement #10  
I could see a couple of inexpensive options;
1) Are the holes in both ears the same diameter?
If so a large bolt the proper diameter, with a nut and washer.
2) It looks like a 3 point bushing might be the right diameter with a bolt thru it.
3) There should be minimal side loading on that pin, use a thread file or die and get the threads cleaned up and then use a nyloc nut.

4) Or it may be this part number TB44360000A4 [BOLT] which is around $20.

Luck
 

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