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D3B TRACK IDLER WELDING

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CAMPRO

03-22-2002 08:05:45




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I have a 1983 D3B cat and I took off the front idler. Actually I had to pry it off because it was so tight up and down. However, the side to side play was very loose. The track frame looks like it had a 1/4" weld strip down each side to help control side to side movement, but it has worn away and into the track frame. The plates that control the side to side movement are also worn out. Can I reweld the plates and the track frame? My side to side clearance, I think is suppose to be 1/16" per side? My up and down clearance is suppose to be 1/8" total? Any thoughts?

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Bob /Ont.

03-22-2002 18:34:49




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 Re: D3B TRACK IDLER WELDING in reply to CAMPRO, 03-22-2002 08:05:45  
Hi Campro, you can build up every thing that is worn, back up square. The idler side plates should have shims under them. These shims are used to position the idler center/side to side with the track frame.( more precisely the edges of the idler flange with the edges of the double flange rollers)This will cause the track to run nicely over the idler and under the rollers, reducing wear. The shims and side plates are used to get this, should have one shim clearance frame to each side plate when done. You said the idlers had to be forced off. Are the wear strips that the bearing blocks ride on even or worn bad in one spot? Are the idlers tight on their shafts or wobbely?Be back later Bob

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CAMPRO

03-23-2002 06:10:38




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 Re: Re: D3B TRACK IDLER WELDING in reply to Bob /Ont., 03-22-2002 18:34:49  
The track frame where the idler sits had been welded up on top and underneath recently. So the idler is very tight top and bottom. Does the centering of the idler side to side with those shim really make that much difference in the wear of the machine? If the track rollers have tight centers, should I try to pull the oil plugs in add oil (major job since they are rust on)?



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Bob /Ont.

03-23-2002 16:46:08




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 Re: Re: Re: D3B TRACK IDLER WELDING in reply to CAMPRO, 03-23-2002 06:10:38  
Hi Campro, if the rollers are good (tight on shaft) they have oil in them, they are okay.
The idler should be centred best you can, but it isn't such a big deal on your machine as it was on older machines. If they where not set up right some big dammage happened (early wear), you don't have that to worry about. How is the idler yoke going?
Later Bob



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CAMPRO

03-24-2002 17:10:11




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 Re: Re: Re: Re: D3B TRACK IDLER WELDING in reply to Bob /Ont., 03-23-2002 16:46:08  
We decided to buy a new idler yoke as the yoke and the piston part where both bent. We are going to put new seals on the yoke piston and put the track back on. We also pulled all the hydraulic cylinders on the 6-way blade and took them apart to put in new seals. I am hoping we are going to get done this week working on this machine.



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Bob /Ont.

03-24-2002 19:10:45




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 Re: Re: Re: Re: Re: D3B TRACK IDLER WELDING in reply to CAMPRO, 03-24-2002 17:10:11  
Sounds good Campro. New yoke may be the best way to go if a lot of dammage. You said the Cframe hit the track. Did you check the mounting pins and bearings? Someone else said to, forget name.
If you havent noticed, the serial# for the blade and Cframe is on the upper RH of the back of the blade, use it for blade and Cframe parts.
You got it well on the way now.Bob



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Steve LeBard

03-22-2002 12:28:49




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 Re: D3B TRACK IDLER WELDING in reply to CAMPRO, 03-22-2002 08:05:45  
Sorry I don't know the answers to your questions but i am sure Bob/Ont will be able to help. He's been a big help to me.
Just out of curiousity where did your machine come from. The reason i ask is that i looked at a 1983 D3B in Riverside, california.
just Curious
Steve



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