Another question I have had for sometime in regard to the M939 series trucks. As seen with the M35A2 to M35A3, the "upgrade" included super singles. It was my understanding the military was going to convert the A0's to the A1 configuration (maybe I'm wrong). I see several later modelled 939's sporting the Goodyear G177's. Is there a reason why the military has the regular dual setup and the super singles? I would think the military would want a standardized configuration. Were the dual kept around for trucks who's primary function was for highway type transportation?
Personally, I do like the looks of the A1. However, I like the redundancy the duals provide.
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God Bless America
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1988 M109A3 w/w,VIC1,VRC12,AOM "For God & Country"
1988 M35A2C w/w,VIC1,VRC12,AOM "The Trinity"
1968 M35A2 w/w,VIC1,VRC12 "Exodus"
1983 AM General M923, RRAD, VIC1 "JY"
1987 M105A2
1985 M105A2 (Expedition Trailer Project)
1967 M105A2 (Storage Unit for now)
1978 PU-650B/G 60kw Gen/M200a1 "The Brick"
M939/M923/M925/M931 Winter/Cold Weather Masks FOR SALE http://www.steelsoldiers.com/parts-sale/83303-m939-m923-m931-m925-winter-cold-weather-masks-new.html
Less tires = less stuff to break = less parts needed to be carried by the supply guys
In my BN, and from what I could see at my time at Hood, there was no "send me a A0 for highway use, not an A1 with super singles" It was "send me a cargo 5 ton".
The did try to standardize. The A1 and A2 have the same tire.
Trying to retrofit a zillion A0's to A1 tire config = big $$$$$$$$$$$ for no real tangible reason at that time.
I may be off on this but I had been told/read somewhere that although the super singles were both good and bad, a big reason they went with the duals again was that with this series being on super singles it put the center of gravity way up there and road manors were less than ideal IE- guys had a tendency to roll the truck and they felt this was to much of a risk especially on public roads. Not sure if this was the answer you may have been looking for in regards to your question
I have never heard that the Army made any attempt to upgrade M939A0 series trucks to A1. If they would have done this to the M939 series trucks, they would have done it with the M809 series trucks in inventory, too. The USMC did, but I don't believe the Army did. A particular unit may have, but I don't think it was widespread if they did. If you follow the trucks coming out, I don't believe I've seen any with A0 dataplates with singles. This would have been particularly obvious with the M939A0 trucks coming out that have been rebuilt.
Here's an eye opener:
U.S. General Accounting Office
Military safety: Army M939 5-ton truck accident history and planned modifications
Publication Date April, 1999
Physical Description 19 pp.
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Just curious, does anyone know when they started production on the M939A1's? In my research, I'm finding mostly mid-80's production A1's ('85, '86). I'm looking at buying an A0 and converting it to an A1. Why? Because I want to be able to register the truck as a Collector Vehicle/Historical Vehicle. In WA State, the vehicle needs to be at least 30 years old.
__________________
Mike
God Bless America
John 3:16
1988 M109A3 w/w,VIC1,VRC12,AOM "For God & Country"
1988 M35A2C w/w,VIC1,VRC12,AOM "The Trinity"
1968 M35A2 w/w,VIC1,VRC12 "Exodus"
1983 AM General M923, RRAD, VIC1 "JY"
1987 M105A2
1985 M105A2 (Expedition Trailer Project)
1967 M105A2 (Storage Unit for now)
1978 PU-650B/G 60kw Gen/M200a1 "The Brick"
M939/M923/M925/M931 Winter/Cold Weather Masks FOR SALE http://www.steelsoldiers.com/parts-sale/83303-m939-m923-m931-m925-winter-cold-weather-masks-new.html
U.S. General Accounting Office Military safety: Army M939 5-ton truck accident history and planned modifications Publication Date April, 1999 Physical Description 19 pp.
Rollover cab protection? What does that look like? Picked up an M925 yesterday that was rebuilt at Red River Apr09. Has a hardtop I didn't notice a ROPS.
The facts about the G177s" is" duels are more road worthy and last longer on roads also,But simply put ... stability was the key here and the main reason behind the G177s, Driver error was reasoned for many accidents in conus when drivers hitting 55 mph and nailing the brakes with the super singles and went hoping off the road, many units that are / were state side and used there trucks for what they are intended for received the g177 upgrade, along with the anti loc brake system at the same time, Like all military, one can find a truck that may have no antiloc brakes with g177s but as a rule they will go together,upgrading an Ao as u are calling it to an A1 is just bigger tires, there were no i am aware of times the 939 series trucks were upgraded to be a number up, they just went in for anti loc brakes and many times g177s, They could have also retained the 1400s.Also it must be noted that the 939 series first run had NDCCs and most of those got G177 tires and anti loc brakes , but there were some trucks in the A1 that went to g177s , like I said , if they were used over the road alot, they would have been switched over, there was no world wide mandate for any of this, more just by unit and amount of over the road use.
Last edited by emr; 03-16-2012 at 23:09.
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That was just "planned" modifications... It didnt happen.
100% correct I saved the anitoc brake explanation for this quote, they never went with anything more that antiloc brakes for the accident problem because it was driver error, BUT the antiloc brakes sure did alot to help also,And yes antiloc was an additional point made in testing to help these trucks over the road with the big tires, AND Along with additional driver training with the larger tires that were new to the drivers at the time, ALSO no need for any more upgrades because this worked and the accidents all but stopped, Oh and one cant forget the 40 MPH limit in country was also implemented when driving these trucks, and of course helped alot, another reason the guys who want to go over 60 should be nervous when running the 14 or 1600 tires, Uncle sam says 40 is the last official safe speed , But we all go faster , but the day one brakes loose i will say it is not going to be easy to bring her back and maybe impossible, just an fyi, Its a true tactical vehicle as most of us know.
Why M939A0 and M939A1?
I saved the anitoc brake explanation for this quote, they never went with anything more that antiloc brakes for the accident problem because it was driver error, BUT the antiloc brakes sure did alot to help also,And yes antiloc was an additional point made in testing to help these trucks over the road with the big tires, AND Along with additional driver training with the larger tires that were new to the drivers at the time, ALSO no need for any more upgrades because this worked and the accidents all but stopped, Oh and one cant forget the 40 MPH limit in country was also implemented when driving these trucks, and of course helped alot, another reason the guys who want to go over 60 should be nervous when running the 14 or 1600 tires, Uncle sam says 40 is the last official safe speed , But we all go faster , but the day one brakes loose i will say it is not going to be easy to bring her back and maybe impossible, just an fyi, Its a true tactical vehicle as most of us know.
