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MRS IHC Powered Tractors


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#1 Harold H

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Posted 07 January 2009 - 03:22 PM

In the new issue of "Red Power" on the left side of the page is a picture of a MRS-9 tractor. MRS (or M-R-S) tractors were built by Mississippi Road Supply Company. They used IHC power units and other IHC components. They started production of the MRS-9 in 1943 at a small facility in Jackson, Mississippi. This unit was matched with a scraper pan or bottom dump dirt wagon. Although the pans and dirt wagons were called MRS, they were actually built by Bucyrus-Erie for MRS. The MRS tractors were built primarily for the construction industry although some were sold for farm use. A lot of these early MRS-9 tractors, scrapers, and dirt wagons saw action in the Pacific Theater. After WW-2 MRS purchased facilities on a surplus ammunition base which had never been activated as construction on the base was completed just at the end of the war at Flora, Mississippi. In 1947 they started production in Flora with the MRS-9 and introducing the MRS-14, which was brought out to compete with the Cat DW-10 and and a simular sized Euclid. They also built some of their own scraper pans and dirt wagons at this location for a while but went back to having all their scraper pans and dirt wagons built by other companies to their specs. In about 1954 or 1955 they introduced the MRS-18 to compete with the new larger Cat D-15. In 1958 the line was revised away from the old letter series styling to the more vertical grill IHC crawler styling of the new TD-15 and TD-20 which were the MRS-15 and the MRS-20. The MRS-9 was also discontinued at this time. Construction of the IHC powered MRS-15 and MRS-20 continued untill about 1962 after which all MRS tractors were four wheel drive models powered by Detroit or Cummins engines. MRS had started building four wheel drive tractors in about 1956 and they grew progressively larger. IHC talked to MRS abouting producing their four wheel drive tractors but IHC for some reason decided to build their own in house. By the early or mid 1960's MRS was building some of the largest production tractors in the world. The MRS-250 had 500 horsepower and could be mated with a scraper pan of 65 cu yds heped capacity with a 430 horsepower pusher engine on the scraper. A special coal hauling version of this same scraper had a capacity of up to 90 cu yds heped. A lot of MRS tractors saw action in Vietnam. In the mid to late 1970's MRS went out of business. They sold the construction rights and designs for the tractors to Taylor Machine Works in Louisville, Mississippi, and Taylor built a few of the tractors into the 1980's.

Harold H

#2 JimInOz

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Posted 07 January 2009 - 03:52 PM

Hi Harold H,
thanks for relaying that story.I'd never heard of MRS.
I tried to find some info in my reference books,but none available.
My IH Fuel Pump book shows an MRS 6 Towing Tractor using a UD18 engine with twin plunger pump.
Also a MRS 4 (Model 125) Tractor used a UD16 Engine.

Jim
Supply used parts: IH 500/BTD6/TD6,9,14,24.Also Mitsubishi BD2/BS3,MF 2244,Case 310G,Cat 931.

#3 Harold H

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Posted 07 January 2009 - 04:46 PM

Jim,

During the IHC era, MRS produced many special models such as aircraft tow tractors, but the most common construction/farm models were the MRS-9 which used the 334.6 and later 340.4 cu in 4 cyl UD 9 power unit, the MRS-14 which used the 460.7 cu in 4 cyl UD 14 power unit, the MRS-18 which used the 691.1 cu in six cyl UD-18 power unit, the MRS-15 which used the 554 cu in 6 cyl TD-15 engine and the MRS-20 which used the 691.6 6 cyl TD-20 engine. As far as I know, none of the MRS four wheel drive tractors used IHC engines. The various models may have had another technical model number for ordering but they still had the UD-9, UD-14, or UD-18 decals on the side of the hood and were refered to as 9, 14, 18, etc.

Harold

#4 Delta Dirt

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Posted 07 January 2009 - 09:39 PM

Harold----

Great to see the report on the MRS----------I've got some pictures back in the files somewhere--------will try to find them in a day or so. There are also some 40's------50's production pictures of the MRS on the Wisconsin Historical Society Archive (under the IHC) heading.

Glad to see you still kicking----------------happy New Year to you.

Delta Dirt
Avon, Ms 38723

#5 rocko59

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Posted 08 January 2009 - 09:24 AM

Thanks Harold, that's very interesting & some of us still don't have a subscription. I have info & pics on the later post-IH tractors if anyone would like to see. Russell
From the Okanagan valley in beautiful British Columbia, maybe THE place with the highest concentration of IH crawlers and according to IH, when they were going strong, some of the toughest conditions for logging equipment, they sent a lot of machines to southern BC to R&D!! IH/Dresser Mechanic since 1987, a few before that too, TD25's are great, TD20E's sound awesome!! Worked on TD5's to TD25G's. TD15C number 501, the very first one is still working near here. I have a Hough model 12 track loader S/N PL12-647 and a TD15-151, S/N 4864.

#6 Harold H

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Posted 13 January 2009 - 03:28 PM

Do any of the readers of this IH Construction Equipment board have a IHC powered MRS tractor? I asked on the General IH board and got no answers.

Harold H

#7 M Diesel

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Posted 13 January 2009 - 03:36 PM

I think that guy with the 9 was the first actual tractor I've seen here. All the rest were just old photos.

Gary M

1949 Cub
1951 M - 1951 MD - 1957 450 - 1953 Super C

1953 TD9 "Ichabod JR" aka "Icky"
1949 TD18 "Brutus" -- 1956 TD18-182 "Yard Dog"

1964 Loadstar 1600 -- 1975 Loadstar 1700 dump truck
1949 Massey 44


#8 Dr. Ernie

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Posted 16 January 2009 - 02:13 AM

I do not have one I would not mind having one though, If I recal correctly the first tractors were a adjusted Super duper W-9 It had a 350 motor with a rpm set at 1900?? they also used a injection pump setting for a TD-14. I have a TD-9-91 serries set with a 14 spring pack and fuel setting, the rpm is stock, lets just say It runs good. I have wanted a MRS 9 ever since I set the 91 that way. ... :blink:
Addicted to iron, I like crawlers and opperate them as well
.... "Steel does not go flat"...

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#9 Harold H

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Posted 16 January 2009 - 08:45 AM

Dr. Ernie,

You are correct in that the MRS-9's turned a higher rpm and used different pump settings than the stock IHC which gave them higher horsepower. However, the early (1943-1952) MRS-9's had the 334.5 cubic inch engines. The 350.4 cubic inch engines was only used in the later MRS-9's after IHC introduced the larger 350.4 engine in 1953. This 350.4 engine was used untill MRS discontinued building the MRS-9 in late 1958.

Harold H

#10 Paul DeWitte

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Posted 16 January 2009 - 09:51 AM

I have never seen an MRS tractor, but thought that I remember them as being 4 wheel drive tractors for farm use. Evidently that was a secondary thing after all of the other things that they were made for.

What did the MRS9 and the other 2wd tractors (if they made any others) use for trans and rear end?