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Caterpillar D7 3T


 
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Bookman
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PostPosted: Sun Feb 10, 2019 11:39 am    Post subject: Caterpillar D7 3T Reply to specific post Reply with quote

What is the horsepower of a Caterpillar D7 3T such as the army used in the late 1940s. Not finding it anywhere on the Internet. Thanks
 
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hector gemme
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PostPosted: Sun Feb 10, 2019 12:54 pm    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

The D7-3T should have 100 horsepower
 
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Larry Hardesty
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PostPosted: Sun Feb 10, 2019 1:02 pm    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

CVPost-hector gemme wrote:
(quoted from post at 13:54:58 02/10/19) The D7-3T should have 100 horsepower


Thanks very much. I am researching a story on the army crawlers coming through western Nebraska during the blizzards of 1949 to dig out ranchers. I think these were the crawlers the army used during that period.
 
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Billy NY
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PostPosted: Sun Feb 10, 2019 6:47 pm    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

Military Technical manual states 70-90 DBHP for a 7M & 4T, which was a government purchase order, some 3T's were used as well, but not all went to the war effort. They built 3T's until 1955. Last couple of years they came with an oil bath clutch, very reliable tractors.
 
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D7fever
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PostPosted: Mon Feb 11, 2019 3:48 am    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

3T was the civilian model, 4T was the military model. So if the military was using D7's to move snow, they
were using 4T models. Actually no difference except the 3 or the 4. Probably had a cable blade where the
cable went overhead, and used a LeTourneau winch, or if the cable went alongside the tractor in a pipe,
they used a Caterpillar winch. The blades could be either Caterpillar or American Car and Locomotive.
 
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Billy NY
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PostPosted: Mon Feb 11, 2019 4:00 am    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

Slight difference, 4T's did have higher gear ratios in the transmission, ground speed was faster.
 
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Billy NY
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PostPosted: Mon Feb 11, 2019 4:20 am    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

LeTourneau called their cable control a Power Control Unit, (PCU)Caterpillar did not start making these cable controls and blades until after the war, they called theirs Cable Control Units, (CCU) American Car & Foundry in Berwick PA made the dozer kit blades, and I am unsure as to whether they built the tractors as well under license to Caterpillar, I have one their blades,. LeTourneau made knock down dozer kits AC&F made ones that were not knock down.
 
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Bookman
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PostPosted: Mon Feb 11, 2019 11:09 am    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

Thanks for the good information. I knew this site would come through.
 
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Bookman
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PostPosted: Mon Feb 11, 2019 11:10 am    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

Thanks again for the good information. I knew this site would come through.
 
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sms
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PostPosted: Tue Feb 12, 2019 3:33 am    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

I have a 1948 with a Laplant-Choat hydraulic blade.
 
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Bookman
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PostPosted: Tue Feb 12, 2019 9:14 am    Post subject: Re: Caterpillar D7 3T Reply to specific post Reply with quote

CVPost-sms wrote:
(quoted from post at 12:33:08 02/12/19) I have a 1948 with a Laplant-Choat hydraulic blade.


Probably more than a few still around. Is this one with all the cables?
 
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