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Giving her a new pair of shoes

colson04

Senior Member
Joined
Apr 11, 2016
Messages
2,057
Location
Delton, Michigan
Man, that is quite the serious winter project. We are talking about doing the same to a Deere 550G this winter. Bushings are shot, pads are good though. Wish we had that nice heated shop to do the work in like you do. Then it would probably get done.
 

Tugger2

Senior Member
Joined
Mar 22, 2018
Messages
1,366
Location
British Columbia
back in the 70 s i worked for the Cat dealer for a year . The bulk of our work was for Utah Mines. I welded out so many broken roller bolts and replaced front roller pockets on D9 tractors , id never put an undercarriage back together without new bolts, unless it was mine and i was working out in my back 40.
 

MG84

Senior Member
Joined
Jan 6, 2023
Messages
647
Location
Virginia
My Case 450c needs new bottom rollers this winter and honestly I’m dreading it. They are original so they haven’t been touched since 1987. I know most of the bolts will probably shear off then I’ll be pulling the track frames...
 

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
12,260
Location
Canada
My Case 450c needs new bottom rollers this winter and honestly I’m dreading it. They are original so they haven’t been touched since 1987. I know most of the bolts will probably shear off then I’ll be pulling the track frames...
It makes the job so much easier pulling the track frames and turning them upside down. If any bolts break they are easy to access and weld nuts to or drill out.
 

Krackerjack9

Well-Known Member
Joined
Dec 3, 2007
Messages
170
Location
working at Camp Anaconda,Iraq
Occupation
working in Iraq right now
I got mid 80s Komatsu D20 dozer and I just replaced the bottom rollers on mine and i hit them all with some penatraiting oil PB blaster for 2 days then hit them with my cordless Ridgid 1/2in impact and all the bolts came out and most looked fairly new as in no rust on them and they were original due to bolt markings, Komatsu uses their own inhouse bolts so should go pretty well I would think on your end
 

skyking1

Senior Member
Joined
Nov 3, 2020
Messages
7,465
Location
washington
My Case 450c needs new bottom rollers this winter and honestly I’m dreading it. They are original so they haven’t been touched since 1987. I know most of the bolts will probably shear off then I’ll be pulling the track frames...
If you go after those bolts like you don't have to get them out the first day, you'll probably do okay. Use oil like PB blaster suggested above. Heat up the track frame near the bolts with a rose bud. It draws the oil up into the offending threads.
It doesn't take much heat to move penetrating oil.
Then go away and leave it alone. If you're a Monday - Friday guy let it hang out over the weekend.
 

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
12,260
Location
Canada
If the bolts are tight and have a washer I can't see how penetrating oil can get wicked upwards into the threads even with heat. There would have to be at least a slight space for the penetrating oil to get in or the bolts slightly loosened. Beating the bolts with a hammer before trying to loosen them can help. The heat can certainly help though. If the track frames were channel iron and you could apply penetrating oil on top of the bolts would have a better chance of getting into the threads.
 

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
12,260
Location
Canada
I can understand that if there's at least a tiny space for the penetrant to get in. Everything sucked tight and flush I can't see it.
 
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