Redbaron1
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and yes, I heard that about the mister. I am sure they are fine. Just ya don't know what ya don't know sometimes. Thought I was safer to stick to Allison...
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M931A1 carrying capacity.
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Redbaron1
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Hey, so I am not getting this bridge formula. Sorry, but can u explain what it is figurin?
That is the DOT here in the US for Weight distribution on trucks. It has it for semi trucks as well.
The allison will hold up to it not being rough.
I got 30k mi ea out of 2 allisons i had in the 923 towing with the NHC250. I got 280k out of the CAT 7155 berfore i messed it up doing a repair.
Redbaron1
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I will have to look at it again, that bridge formula. Most of my hauling is not terribly hard on the equipment. Pit to field, 15 minute turn arounds and sitting at pit loading for two minutes. It's the odd time when you got loose soil and get bogged down or hilly fields when you can't pin it but don't want to lose speed. (speed = 5-8 mph). I am thinking if I go with this 931, i'll leave the 250 in for a year and see again. I can always drop a 350 small cam or 400 big cam in then. Thanks for the input. I can see the cat going farther bc it's actually a manual trans. I run a 13 spd single over in my rig now with an 18:1 final drive planetary axle. Max speed: 45 km/hr.
Redbaron1
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So are you selling that or something?
Glenngineer
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That looks like a nice upgrade, how would it fit in a M931A1 ?
I will sell anything I have. I was gonna put it in my 923 but i went a different direction.
Its brand new actually for 2500.
It will work. You have to remove the factory x brace in the middle frame and use the one on the bogie. Frame width is the same
You have to locate a 5.55 top loader which isnt hard to find to put in the front axle. The rbu is a 5.57 ratio.
I have a thread on what all it would take.
It actually has more spaceing between the axles for larger tires which moves the rear axle rearward 4 or 5 inches.
Redbaron1
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Do you have the tandem front steers as well?
No. Only 1 axle on the front of an MK48 steers. The other is a solid. On the M977 HEMTT variants both steers turn. But not on a MK48. The Mk48 has a weird steering setup on their steer as well.
I have only ever seen 1 steer available for a mk48. A 5.55 ratio in the toploader is common and drops right in. The 5 ton axle and springs is more than enough to handle the front weight.
Redbaron1
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Ok, well I should explain why I am asking. I have an 8.3 cummins turbo, Allison setup on chassis. It is a firetruck I picked up a while back. My original plan was to build everything under this chassis with A4000 series planetary axles. They are getting harder to come by, so plan b was this 931 or something similar. Anyways, that's why I asked, bc if I pick up 3 or four axles, I can still build similar to original plan. Like I said earlier, i am open to options. So you don't have any steers to match, if I understand correctly? Thx
Redbaron1
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btw then, is the mk48 articulating? (front front steer, rear front solid, articulation, rear tandems?
Redbaron1
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Or should I say, is the mk48 coupled to it's "trailer" with an articulating joint? And does the mk48 drive the rear "trailer". I don't know if I got this right...
No steer to match. The MK48 steers are hens teeth. I have only seen 1 for auction. You would be easier to find a steer with a near identical ratio
Yes front steering only. Articulation middle. Rear units are called Rear body units [RBU] have several models for different duties
Redbaron1
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Aren't the five tons a 6.44 ratio?
Yes. However there are top loader 3rd members that are 5.55 ratio which is a close enough ratio to install in the front axle for it to be used with the 5.57 ratio rear axle of the Mk48. The 3rd members drop right into the 5 ton axle housing.
Redbaron1
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Ah, I see!
Redbaron1
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I am catching on. Thanks for the patience in explaining.
Redbaron1
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So, I like that both those axles have air diff locks. If I were to go that route, I would only use the front of those rears though, at least on this project, as I need the rear rear to steer, so I would need at least two steers as well. I suppose shipping to the west coast of Canada would not be cheap? Have you shipped stuff up this way?