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How much weight can tires and chassis handle?

Farnorth

Member
44
3
8
Location
Melfort, SK
I'm looking for an M923 for carrying a water tank, to tender water to a sprayer on our farm. I'm not looking for what we can legally carry, just what the truck and tires can withstand, traveling on gravel roads. I would like to put a 3200 or 4200 us gallon horizontal tank on it. I realize that is 32000 or 42000 lbs, but this would not be high speed either.
Also, would the super singles handle as much weight as the 11.00 x 20's ?
 

M35A2-AZ

Well-known member
Steel Soldiers Supporter
3,220
390
83
Location
Tonopah, AZ
It is my understand that the 10,000 lbs is off road and the truck can carry a lot more and going slow on your farm you could go 20,000lbs I would think.
 

quickfarms

Well-known member
3,495
25
48
Location
Orange Junction, CA
This is common for water truck used on construction sites around here in Southern California.

Very slow speed with the right driver and it will be ok.

If the driver has a lead foot or is rough on the truck it will not survive long.
 

MuleMac01

Military vehicle collector
Steel Soldiers Supporter
890
158
43
Location
Las Vegas Nevada
I think 44k is way over kill for the rear axle but if you guys seen it done so be it. There's a reason why the government has a weight limit on axles on big trucks 12k front. and every other tandem axle after that is 34k. I know I know thats mostly highway trucks but just saying be careful :)
 

quickfarms

Well-known member
3,495
25
48
Location
Orange Junction, CA
I think 44k is way over kill for the rear axle but if you guys seen it done so be it. There's a reason why the government has a weight limit on axles on big trucks 12k front. and every other tandem axle after that is 34k. I know I know thats mostly highway trucks but just saying be careful :)
You are quoting the bridge law for the 12k and 34k for a tractor trailer. This changes based on axle spacing. With a permit you can exceed this. When I was driving we used to scale at 60k for a three axle. I have a friends that legally weigh 70k on a properly specified straight dump truck.

The 44k is design capacity and is very common on construction trucks.

This application is for off highway.
 

hklvette

New member
373
7
0
Location
Christiansburg, VA
Level ground and slow, not a problem. Get it sloshing on off camber turns? It will roll.
This applies to any tanker truck unless it has a baffled tank. Anyway, It probably wouldn't hurt to have the water tank as far forward on the chassis as possible to distribute some of the load to the front axle. The biggest limiting factor I think you'll find is what the wheel (not the tire, just the wheel) is rated for. A wheel failure with that much weight would be very bad...
 

VPed

Well-known member
Steel Soldiers Supporter
1,104
294
83
Location
Clint, TX
The Michelin XZLs in 395/85R20 are rated at 12300 lbs. each and they offer a slightly wider footprint.
 

Gunzy

Well-known member
1,769
66
48
Location
Roy, Utah
I would only do this with duals(11.00R20) as they are a lot more stable under loads. The potato farmers in Idaho are stretching frames and removing the super single in favor of the duals for load and stability reasons. JMO
 

m16ty

Moderator
Moderator
Steel Soldiers Supporter
9,576
211
63
Location
Dickson,TN
I routinely haul 20 ton (40,000lb) on my M939 lime truck over some pretty rough ground. Only difference is the truck started life as a wrecker (M936) and has the double frame and heaver springs.
 

jatonka

Well-known member
1,802
87
48
Location
Ephratah, New York
5 Tons use a 20,000 front and 44,000 rears, on your farm, on your roads, you could carry 64,000 or more at controlled speeds and moderate grades. When I was in school, water weighed 7.98 pounds per gallon, when did that change? JT out
 

Keith_J

Well-known member
3,657
1,319
113
Location
Schertz TX
231 cubic inches per gallon, cubic foot of water is 62 pounds, that works out to 8.28 pounds per gallon. Unless it is salt water, then that is 64 pounds per cubic foot which is 8.55 pounds per gallon. Now if you are hauling deuterium oxide, it will be a bit over 9.2 pounds per gallon ;)
 
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