MK48 wheels

[Mutilatedjak]

@simp5782....
So do you need to change the studs or they are directly swappable?

 

[simp5782]

Standard budd wheels on the MK48 stud/hub. Lug nuts work fine as well

 

[RobertoGatos]

They will

The hemtt wreckers and mk48 share hub bearings and seals are the same Inside 594a and outer 580. And they use the same hub 2cf281. Brake shoes 97110 and drums 2cf280 are the same. Lug studs are the only thing different They are the same 16.5x7 shoes

They don't fit...

So I tried this out a few weeks back, and Hemtt rims do not fit on the Mk48, not even close. Major interference with the valve stem, you'd have to grind a significant amount of material off the drums, to cluster-**** it on there. Decided it's better to just deal with finding 21'' tires when the time comes.

You can however put MK48 wheels on a Hemtt no problem. Dunno why you would, but its possible.

 

[simp5782]

Then its apparently the stud jssye

They don't fit...

So I tried this out a few weeks back, and Hemtt rims do not fit on the Mk48, not even close. Major interference with the valve stem, you'd have to grind a significant amount of material off the drums, to cluster-**** it on there. Decided it's better to just deal with finding 21'' tires when the time comes.

You can however put MK48 wheels on a Hemtt no problem. Dunno why you would, but its possible.

View attachment 806605

Some pics of what was hitting would have been appreciated since the part numbers for the
M984 wreckers and MKs are the same except studs so the drum shouldn't hit. Compared to the regular HEMTT which uses a different drum. Mk uses 1-1/8" hemtt uses 3/4" budd studs

Will put one the MK48 bogie to see what is going on. Maybe a spacer due to the interior offset. I bet they will work on the RBU

 

[RobertoGatos]

It was a pretty big interference between the valve stem / drum. Had the proper valve stems on the wheels as well, for a Hemtt.

Agree they'd work on the RBU if the drums are smaller. Considered that, but the problem becomes a difference in overall diameter between the tires on the FPU / RBU. 16r20's are noticeably taller.

If the part numbers are the same, maybe the Hemtt wreckers had an updated version? They're newer trucks, right? Something with a relief for the valve stem could have been cast into the drum? Dunno, just a guess. MK drums are round all the way 'round.

 

[gringeltaube]

MK drums are round all the way 'round.

LOL... all drums, actually! (sorry couldn't resist... )

It was a pretty big interference between the valve stem / drum.

Curious to know, where exactly...? (could you place an arrow in this drawing, below?



(I've had a similar case once and was able to solve it by putting a different valve, closer to the wheel center disc. But that was only on two wheels, not 8 )

 

[RobertoGatos]

Nice blueprint.

Arrow shows where you first contact the drum, the brass hexagonal boss for the valve stem is quite thick here. Tried fluffing that down a bit with the grinder. Still no luck.

The drums have a taper on them from casting, so the interference grows worse as you slide the rim further onto the hub. Would say with my efforts, the rim was still at least an inch away from meeting the face of the drum. It also looked like accessing the valve stem would have been a PITA.

 

[Mutilatedjak]

What's a good place to find tires or tire and wheel combos?
Thanks!

 

[Ryan31783]

Thread revival warning… what do you think about plugging the OEM valve stem hole and re-drill/machine something for a 24 bolt HMMWV wheel valve stem on the outside of the face of a HEMTT wheel?

 

[98G]

Thread revival warning… what do you think about plugging the OEM valve stem hole and re-drill/machine something for a 24 bolt HMMWV wheel valve stem on the outside of the face of a HEMTT wheel?

To what purpose?

 

[simp5782]

You just remove the valve stem and install turned the opposite direction

 

[Ryan31783]

To what purpose?

To be able to run a 20” wheel (much,much more plentiful) vs the 21”

 

[98G]

To be able to run a 20” wheel (much,much more plentiful) vs the 21”

I'm confused. What vehicle do you want to use these on?

HEMTT rims work just fine on a 939series or 809series 5ton.

 

[DeMilitarized]

I'm confused. What vehicle do you want to use these on?

HEMTT rims work just fine on a 939series or 809series 5ton.

The thread is clearly talking about putting a Hemtt wheel on a mk48

 

[98G]

The thread is clearly talking about putting a Hemtt wheel on a mk48

Thanks. Somehow I missed that.

My understanding is hemtt and mk48 were deliberately incompatible to avoid using hemtt tires on the mk48 as the sidewalls of the 16.00R20s weren't up to the sideways loading inflicted by the mk48.