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Dozers and Crawlers

D8 Caterpillar Dozer, 2U Series


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  #1  
Old 01-24-2010, 08:51:39 PM
Caterpillarcrazy Caterpillarcrazy is offline
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Default D8 Caterpillar Dozer, 2U Series

This is my iron giant, and I am always fascinated with how this old giant runs when I start her up. Although she needs some work, I'll be starting with the seat next weekend, I have never heard an engine that runs as well as her's does. The pony motor has a mind of it's own, but once you get it started the diesel usually pops off in 30 seconds or less, even when it's 10 degrees outside.

I don't know a lot of history about this dozer, and I was told it was built in 1954. My research tells me that it's older than that, but not by much. The s/n is 2U16533, but with Cat it's difficult to determine an exact year of manufacture with these oldies. Any help would be appreciated.
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  #2  
Old 01-24-2010, 08:59:58 PM
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Phil Johnson Phil Johnson is offline
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Default Re: D8 Cat Dozer, 2U series

Your Cat looks to be in very good shape. I always liked the D8 of those years. I remember working on them in the early 60's when there were a lot of them in service in this area. I am a welder and worked for a Caterpillar dealer/service agency at that time.
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  #3  
Old 01-24-2010, 09:29:15 PM
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Default Re: D8 Cat Dozer, 2U series

Good to see a nice old D8-2U again, first dozer I ever ran was a 2U. Had a push block for pushing scrapper pans and winches for a tow pan. We didn't use the tow pan, but the next owner did on a job or 2. The local dozer repair shop ended up with it and parted it out, it had a crack in the rearend housing.
I see you are in Fort Collins, that's a nice area. My daughter and son inlaw live in the Thompson River Ranch subdivision in Johnstown south of Fort Collins.
Keep all that old iron running,
PT
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Old 01-24-2010, 09:50:08 PM
Caterpillarcrazy Caterpillarcrazy is offline
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Default Re: D8 Cat Dozer, 2U series

Fort Collins is a nice area, and i'm very familar with the area that you told me about around Johnstown.

I like it around here, but the big iron like my D8 (I also inherited a D2, of which I will upload pics of in the near future) is hard to come by. Not a lot of people in this area know a lot about big iron like this, let alone how to start it. I'm glad I paid close attention to Dad when he was working on his mechanical endeavors. And, I'm also proud to say that I'm probably one of the few 36-year-old guys in the country that knows how to work on (and start) these iron giants.

My Mom would really like to sell and part out some of the equipment on the place, the equipment that Dad didn't have a chance to do a restore on, so the debate right now is what to do with it. I simply don't have the heart to sell a lot of his equipment, unless I know someone will appreciate it as much as I do and Dad did.
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Old 01-25-2010, 12:19:20 AM
ronm ronm is offline
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Default Re: D8 Cat Dozer, 2U series

You need to get on this site-
www.acmoc.org
Anything & everything about old Cats...They used to have a serial number list in the archives, I can't find it now. But just get on & ask, you will find out what year it was built. If you don't know any Cat people around Ft. Collins, just try Longmont, I think there's quite a nest of them there....
That Cat didn't set just south of Boulder on Highway 93 for years, did it? It or its twin sister did...
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Old 01-25-2010, 02:08:23 AM
Caterpillarcrazy Caterpillarcrazy is offline
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Default Re: D8 Cat Dozer, 2U series

Hi Ron,

Just joined ACMOC about 7 days ago. A friend of mine, who actually stores an old Caterpillar 20 on the place, bought me a subscription last week. He's been a member for about 10 years and recommended that I join. I'm just like you in that I tried to reference the s/n on the site, but didn't have much luck. My friend, the one mentioned above, is helping me with determining the year she was built. He actually has a call into one of his friends, who is fairly high up in the Cat company, and this guy said that he would look into it for us.

My D8 was actually up on a ranch on the Red Mountain Road for a long time, which is way north of Livermore.
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Old 01-25-2010, 07:38:27 AM
eddie bedwell eddie bedwell is offline
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Default Re: D8 Cat Dozer, 2U series

Hi Caterpillarcrazy,
my ACMOC Serial Number Reference Manual tells us that your D8 was built about mid 1952.
Cheers,
Eddie B.
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Old 01-25-2010, 10:49:25 AM
ronm ronm is offline
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Default Re: D8 Cat Dozer, 2U series

I didn't figure it was the same one, but sure looks like it. One son was going to school in Boulder, the other one in Golden, so we traveled 93 a lot for several years....that old D8 sat on a curve just out of Boulder for 2-3 years, then one day it was gone...always hoped it didn't fall to the torch....ya never know, in Boulder county the belly pan could be called a hazmat site...
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Old 01-25-2010, 01:06:44 PM
Caterpillarcrazy Caterpillarcrazy is offline
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Default Re: D8 Cat Dozer, 2U series

Gentlemen,

Eddie, excellent information! Thank you very much. The boys over at ACMOC are working on serial numbers for me, and I'm very glad that you have the s/n reference. Dang it! Now I REALLY don't want to go to work. More fun posting threads and listening to you folks.

Ron, amen on the Boulder County reference. Boulder itself is about 40 square miles surrounded by reality.
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Old 01-25-2010, 02:37:18 PM
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Marcel P Marcel P is offline
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Default Re: D8 Caterpillar Dozer, 2U series

That is a good looking dozer, does it have the oil clutch? You're right about the pony - they can be very temperamental! You are lucky that it is equipped with an electric starter. I am looking to build one myself, getting tired of hand cranking, that crank location is just awful!

Marcel
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Old 01-25-2010, 02:45:23 PM
Terry Welch Terry Welch is offline
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Default Re: D8 Caterpillar Dozer, 2U series

CC as I put in the 212 post also in the latest ACMOC mag is a photo of a 2U my son was running. It is like a 1945. Runs nice and smooth, but you have to like the big seat so you can slide back and forth to see around the blade. The one we have is missing a part off the pony. So it is a little harder to start.
Terry
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Old 01-25-2010, 03:11:20 PM
Caterpillarcrazy Caterpillarcrazy is offline
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Default Re: D8 Caterpillar Dozer, 2U series

Terry,

I'll take a look at ACMOC. Looking forward to seeing the pics.

Marcel,

The D8 has a dry clutch. According to what I looked at at ACMOC, I think the oil clutch was standard starting with 21513 and up. Mine is an older 2U series. As far as her pony motor, she's a crank start. My D2 is an electric start. The D8 pony is a little bi%!& to start, but her diesel motor pops off in 30 seconds or less, regardless of how cold it is.
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Old 09-04-2011, 04:37:00 PM
Brad Hauck Brad Hauck is offline
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Default Re: D8 Caterpillar Dozer, 2U series

Here is a picture of an old crawler we recently acquired. It is a Euclid Tc12 with the twin detroit diesel engines. Kind of a unique design for a crawler.

Brad Hauck
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Old 01-05-2012, 03:17:29 PM
Gary Meadows Gary Meadows is offline
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Default Re: D8 Caterpillar Dozer, 2U series

I love these old bulldozers too. My father has owned a D7 and 2D8s and several other bulldozers of different kinds. I operated both the D8 and theD7. One of the D8s we never got started. He has sold the last D8 last year. I am am a wood worker and have made 2 models of them out of wood. I am now working the 3rd one.
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Old 01-05-2012, 10:19:42 PM
Terry Welch Terry Welch is offline
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Default Re: D8 Caterpillar Dozer, 2U series

It was built in 1952 mid to later on in the year. The serial # start at 2U16270 and go to 2U16727. They made over 23,000 2Us. Nothing like the even pitch to the sound of one. Unless you are running a three cylinder in a diesel 35. Or the gas engine in a R5 one of the last gas Caterpillar models made. You can get this info from ACMOC in their book Track-Type Machines 1925-1960 I think you can get it from your local Cat dealer also. I may be able to get it narrowed down from a friend of mine who just retired from Cat in Peoria. He dated my son's RD6 to the month it was built and almost the date.
Terry
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Old 01-06-2012, 11:24:23 AM
Gary Meadows Gary Meadows is offline
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Default Re: D8 Caterpillar Dozer, 2U series

I enjoy reading about and looking at pictures of old D8 bulldozers. In an earlier message I mentioned that my dad had owned 2 old D8s. I really enjoyed operating them and helping dad work on them. He has sold them the last one last year. I also mentioned that I made wooden models of them. I have made 2 and am working on the 3rd one. I had the real one to look at the first 2times. Since he has sold it I now have to rely on pictures. I have a few of them of dads old one and some I have found on line. If anyone has pictures they would not mind sharing I would appreciate seeing them. I am just beginning to learn how to use a computer. When I finish my model and figure out how too do it I will share pictures of it.
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Old 10-30-2014, 09:06:09 PM
phunguy1976 phunguy1976 is offline
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Default Re: D8 Caterpillar Dozer, 2U series

Quote:
Originally Posted by Caterpillarcrazy View Post
This is my iron giant, and I am always fascinated with how this old giant runs when I start her up. Although she needs some work, I'll be starting with the seat next weekend, I have never heard an engine that runs as well as her's does. The pony motor has a mind of it's own, but once you get it started the diesel usually pops off in 30 seconds or less, even when it's 10 degrees outside.

I don't know a lot of history about this dozer, and I was told it was built in 1954. My research tells me that it's older than that, but not by much. The s/n is 2U16533, but with Cat it's difficult to determine an exact year of manufacture with these oldies. Any help would be appreciated.
Anyone out there with some ideas on a 1952 Cat D8 2U hydrolic blade. The blade goes up great but the valve is really finiky trying to find the down position. I was hoping someone might have some info on the valving before I tear it apart. Thanks

---------- Post added at 09:06 PM ---------- Previous post was at 09:03 PM ----------

Quote:
Originally Posted by phunguy1976 View Post
Anyone out there with some ideas on a 1952 Cat D8 2U hydrolic blade. The blade goes up great but the valve is really finiky trying to find the down position. I was hoping someone might have some info on the valving before I tear it apart. Thanks
The D8 2U is serial #2U16294 built in 1952 I beleive. But being hydrolic makes the date seem wrong. Any info on that would also be helpful.
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Old 11-03-2014, 12:20:29 PM
WyoCat WyoCat is offline
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Default Re: D8 Caterpillar Dozer, 2U series

Hey caterpillarcrazy, If you care to venture roughly north to Laramie, you can come see my collection and parts yard for old Cat's. I always like to meet new people and talk old iron any day!
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Old 05-25-2015, 08:15:44 PM
phunguy1976 phunguy1976 is offline
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Default Re: D8 Caterpillar Dozer, 2U series

Anyone out there with some ideas on a 1952 Cat D8 2U 13000 water pump? My shaft seal is leaking and I can't seem to get a wrench that will fit on the packing nut?
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Old 05-26-2015, 08:15:12 PM
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Default Re: D8 Caterpillar Dozer, 2U series

phunguy1976, try S&S Tractor Parts in Marcellus NY. They are a dozer salvage yard and repair shop. They are the ones that parted out the D8 I mentioned above, a long time ago. They still do cater to some of the old iron and should still have the old tools (I hope).
Phone: 315-673-1075

good luck
PT
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