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Tractor for Dozer

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oldtanker
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Joined: 01 Sep 2004
Posts: 13933
Location: Mn

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PostPosted: Fri Dec 14, 2018 7:03 pm    Post subject: Re: Tractor for Dozer Reply to specific post Reply with quote

I have a D4 7U, but you couldn't give me a select o speed. Think I'll keep the D4. It tips the scales with a Cat blade right around 14000.

Rick
 
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caterpillar guy
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Joined: 24 Jun 2007
Posts: 4567


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PostPosted: Fri Dec 21, 2018 3:21 am    Post subject: Re: Tractor for Dozer Reply to specific post Reply with quote

The big difference in the D-2 and the D-4 was the roller frame. The D-2 has the roller frame held by the bearing you see on the side in the middle of the roller frame. When that bearing gets bad the tracks run off as the frame does not stay aligned with the sprocket.
The D-4 however has what looks like a huge rod bearing connection underneath on the back end with an arm that is welded as part of the roller frame inside the roller frame under the tractor,this comes back to that huge rod bearing looking spot underneath the tractor in back. It will have a grease fitting on it. That was a much better method for holding the roller frame aligned with the sprocket. Dad's is a mid to late 30 's d-4 never had a problem with alignment of the roller frame. It has a swinging drawbar on it also. We plowed with it for 50 years.
 
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