acmoc

ACMOC Membership Benefits

  • FREE quarterly magazine filled with content about antique Caterpillar machines
  • FREE classified listings
  • ACMOC store discounts and specials
  • Full Bulletin Board Access
    • Marketplace (For Sale/Wanted)
    • Technical Library
    • Post attachments

$44 /year ELECTRONIC

$60 /year USA

$77 /year International

D4 Traxcavator - weld-on sprocket rim technique without removal

More
2 months 2 weeks ago #239316 by neil
Hi all, my buddy has bought the D4 Traxcavator advertised last year and it comes with a pair of sprocket rims. I was eyeballing it the other day and it occurred to me that a competent fitter/welder might be able to install them without having to remove the sprockets from the machine, since there is a lot of room around the sprocket area. 
Has anyone done this and could they comment on results, concerns, method. It looks to me like the old rim could be cut off leaving sufficient material so as to be ground down to concentricity, and then the new rims could be cut in half, say on a bandsaw to reduce the kerf, and then each half tacked on and checked again for concentricity. I'm not competent for this but I would think a full-time welder could do it ok. Thoughts?

Cheers,
Neil

Pittsford, NY
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago #239317 by restore49
I do not remember CUTTING the rim in half - think I used the new rim to mark the cuts on the old spokes. Wonder if a portable Milwaukie band saw would work to make all the cuts on original sprocket??
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago #239318 by dpendzic
I did my 941B rims that way--also didn't have to cut the new rims in half--used them to mark the old spokes and gas cut them making sure they were on the long side and ground down the cuts to fit the new ones on--this was about 25 years ago and no cracks yet in the welds

D2, D3, D4, D6, 941B, Cat 15
Hancock Ma and Moriches NY
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago #239322 by neil
Well, the cutting-in-half is to avoid removing the track frames which is a pretty big job for my buddy. If he could avoid that and get a decent result with fitting the rims, that would be preferable.

Cheers,
Neil

Pittsford, NY
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago - 2 months 2 weeks ago #239323 by restore49
Is there any chance removing the outer bearing and unbolting the cap from the frame lifting that side a bit - would give you enough room to slip the new ring in after cutting away the old??
Last edit: 2 months 2 weeks ago by restore49.
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago #239329 by Wombat
I believe rather than cutting in half, you cut out a sufficiently large enough section to be able to slip on without removing the track frames, this makes it easier to realign correctly when joining as well as marking out the cut on the old sprocket.

Regards, Wombat.
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago #239330 by neil
restore49, I don't know unfortunately as I've never been down this road before, but if someone has, it would be good to know how much effort was involved.
Wombat, that's a great idea since it would reduce the risk of misalignment. I might make a mockup out of plywood to see how well it would work

Cheers,
Neil

Pittsford, NY
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago #239333 by dpendzic
somewhere i read about that procedure--much easier to align a 90 degree or less section of rim rather than a 180 degree section

D2, D3, D4, D6, 941B, Cat 15
Hancock Ma and Moriches NY
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago #239334 by Ray54
I have a cousin that has done a AC HD9 (D6 size) tractor without removing track frame. I have not seen the tractor to look at this. He said it is not perfect but has worked Ok.
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

More
2 months 2 weeks ago - 2 months 2 weeks ago #239335 by restore49
With the Bearing Cap Assembly removed may be possible to get the cut ring out and slant slip the whole ring in.??
Attachments:
Last edit: 2 months 2 weeks ago by restore49.
The following user(s) said Thank You: Fat Dan

Please Log in or Create an account to join the conversation.

Time to create page: 0.171 seconds
Go to top