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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

roller frame repairs 44A D6B

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U9 U9 CAT

10-14-2007 21:11:04




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Well I about got her all welded up any weak places that I need to strienghten up?

I have added 3/16 plate to the gussets between the rollers and 1/4 over the hole diaganal brace.
I replaced one , and one I had to repair so I did the same thing to both of them," roller frames"
The one I had to repair had a crack between the dia. brace and the main frame right at the roller bolt hole I got her fix up. any thing else while I got her down any weak points?? on the frames
Thanks Mike

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Old Magnet

10-15-2007 16:21:49




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 Re: roller frame repairs 44A D6B in reply to U9 U9 CAT, 10-14-2007 21:11:04  
If you did that much welding on the diagonal brace you would be wise to check the alignment of the frame for how it will attach to the inner trunnion on the dead axle (under the tractor) and that it will mount parallel to the tractor. I did what you did to a wide D4 and had to torch off and reweld the inner trunnion to get the alignment back.



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U9 U9 CAT

10-15-2007 20:37:44




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 Re: roller frame repairs 44A D6B in reply to Old Magnet, 10-15-2007 16:21:49  
any easy way of checking your allinment while I have it apart??



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U9 U9 CAT

10-15-2007 20:35:10




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 Re: roller frame repairs 44A D6B in reply to Old Magnet, 10-15-2007 16:21:49  
Yes I was carefull of getting her real hot.
The orginal roller frame was pretty cracked up, the pin in the dead axle was wallered out and the other frame that I got, didn't have one and is bare.. Tomorrow I'm going to put my spring brakets on, I was going to weld them, drill the dowl holes,drill the bolt holes put it back the way it was or as close as I can. Put my front idler on next, I have the adjustment supports from the older roller frames I am going to adapt them to the hyd. type using them for the clearance limit on the hard bar.
I have my day cut out for me.
The old trunyons were real broke up just skcabed together really. I got some that look like new,
I haven't took of the old ones off yet to check out the bearing, or bushing ,the new ones have bushing in them they are used, should I go with them how critcal are they?I got my O-Rings I'm trying to finsh up this week I got a good job for her Thanks Mike

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Old Magnet

10-16-2007 08:11:51




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 Re: roller frame repairs 44A D6B in reply to U9 U9 CAT, 10-15-2007 20:35:10  
On the D4 I had both track frames off and set them up on a level framework to check alignment. The dead axle trunnions are just the right size to clamp 2 in. sched. 40/80 pipe (2-3/8 dia.) once the bearing liners and dowels are removed. Measured up one of my other tractors to get the centers for the final drive ends. I also had to plane about .020 off the faces of the trunnions and rebore the holes. Clamped it all together and welded it up. Between damage, warpage from the welding and wear it was pretty far out and would never track right otherwise. You would have to do something similar with the D6.
Used trunnion bearing shells would work ok if the wear is reasonably even and you still have the lube cross hatch visible. The right fit is to have some bearing crush for the shells and the dowels and dowel holes in good shape.

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Old Magnet

10-16-2007 19:34:36




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 Re: roller frame repairs 44A D6B in reply to Old Magnet, 10-16-2007 08:11:51  
Thats the general idea. You'll have to find out what size pipe or tube fits the D6. Works best if you can run the pipe clear across both frames when they are level and you can check diagonal dimensions and whether or not the pipe/tube is square and parallel.
Also keep track of the distance from the diagonal brace trunnion to the frame so you are not jamming the trunnion against one side of the case or the other. Easier said than done LOL.

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U9 U9 CAT

10-16-2007 19:53:37




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 Re: roller frame repairs 44A D6B in reply to Old Magnet, 10-16-2007 19:34:36  
yep I call this situation " A Can Of Worms"
But you know as well as I do, put something together in a hurry, it'll come apart in a hurry.

and this is taking forever.I need to get some pipe for sweeps anyway Thanks again Mike



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U9 U9 CAT

10-16-2007 19:20:25




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 Re: roller frame repairs 44A D6B in reply to Old Magnet, 10-16-2007 08:11:51  
You always give good advice, Didn't get much done today between visitors and rain. So, I can clamp a peice of pipe with the bearing clamp. The peice of pipe goes thought the trunyon. From there I can measure from the trunyon, to the pipe, maybe sweep with a indcaitor and adj. Thanks Mike



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