Installing FMTV Wheels on a M936

[redrustyhill]

I just got my 395/85R20 tires on FMTV rims home intended for my M936. The issue is the lug nut holes are not beveled on the backside of the wheel. Fronts are beveled. Is there any way to bevel the holes so I can flip the wheels to mount on rear axles? Google searches are coming up empty. I searched on SS prior to purchasing the wheels and tires and those who have done this said the lug nut holes were beveled on both sides so apparently these FMTV wheels are different or are not FMTV wheels.

 

[goldneagle]

You can always try a real large pipe reamer. Since they can ream steel pipes they should be able to give you some bevel on the lug nut holes. RIDGID makes some real good ones.

 

[redrustyhill]

Didnt think of that, just wonder if the angle would be close

 

[goldneagle]

Didnt think of that, just wonder if the angle would be close

You can always try a machine shop too. I am sure they got reamers out there at different angles. You just need to know what angle you need.

 

[dawico]

You may be able to find a large drill bit (for drilling steel obviously) that will work also. I have done this on similiar projects and it works well.

But, if you need a bit bigger than 1" it may not be worth the expense. I am not familiar with that particular issue.

Another possibliity is a step bit. They are usually available bigger than 1" and cut steel well.

 

[goldneagle]

You may be able to find a large drill bit (for drilling steel obviously) that will work also. I have done this on similiar projects and it works well.

But, if you need a bit bigger than 1" it may not be worth the expense. I am not familiar with that particular issue.

Another possibliity is a step bit. They are usually available bigger than 1" and cut steel well.

I would not recommend a drill bit since it could catch and ruin the hole and therefore ruin the rim. A reamer is designed to shave metal off.

 

[juanprado]

sounds like you have camian or another flavor of mrap wheels and not fmtv. Another member here tried to mount them on a 800 tractor and ran into issues with the rim's width since they are thicker and would not fit his studs. Also they used metric nuts originally.

 

[gringeltaube]

All the FMTV wheels that I have seen so far come beveled on both faces, so this is odd.

First of all let's make sure the bolt pattern is correct: FMTV's are all 10-on-11.25", same as M939 series; while MRAP's have a 10-on-13.2 bolt pattern.
2nd, if the wheels in question had to be used - modified, that should only be done by a professional, in a machine shop. Exact dimensions are critical here! (See this drawing to get an idea).
3rd, FMTV wheels and/or 20x10" 5-ton wheels are relatively cheap, so why bother? Get another set; the correct ones...



G.

 

[Tornadogt]

I have 35 FMTV wheels on pallets all are double beveled...... Post up some photos of what you got.

 

[juanprado]

check out ke5eua's build thread. He bought some camian wheels from the mrap scrapper in Texas and ran into this on his 800 tractor. Ditto on correct bolt pattern but not beveled on one side. Rims are thicker than 5 ton combat wheels or fmtv. OE these use a metric lug with washer built on.

I came close to buying some for just the goodyears but found some closer to me and the supplier in Tx was almost out of the aluminum rims as I wanted aluminum to sell or scrap. These also come in steel. There are 100's of these out there that came from this scrapper. They were listed here on the classifieds for a while.

 

[gringeltaube]

OK, checked that thread... Yes, aluminum wheels are a different story. If that's what the OP got, I would rather sell them and get the steel wheels.



G.

 

[redrustyhill]

They are steel wheels, correct bolt pattern for M939's, but only beveled on front lug holes. Can't post pics today for some reason.

 

[redrustyhill]

I didnt measure wheel thicknes but it appears about the same as a m939 wheel

 

[redrustyhill]

They look like FMTV wheels

 

[gringeltaube]

In fact! 20-bolt, steel, same as regular FMTV wheels! Interesting, those must be the exception of the rule then... learned something today.

This leaves me wondering actually: why would they come beveled on the inner side too, when FMTV's; Caiman's etc. they all use their wheels dished-in, only?



G.

 

[redrustyhill]

I am assumimg the original FMTV wheels were made to also be used on M939's and some of the newer FMTV wheels were not made thus, perhaps due to different manufacturer.

 

[goldneagle]

They look like FMTV wheels

Valve stem going to be an issue too. It does not go in both directions like the combat rims.

 

[ke5eua]

sounds like you have camian or another flavor of mrap wheels and not fmtv. Another member here tried to mount them on a 800 tractor and ran into issues with the rim's width since they are thicker and would not fit his studs. Also they used metric nuts originally.

Yep, I'm that guy. I got the MRAP aluminum wheels and ran into all sorts of issues with them. Ended up getting 900 series combat rims. Still gotta switch the tires over, lol

 

[redrustyhill]

Valve stems is a non issue, they can be turned around. Buying another set of wheels isn't an option so I am looking for a machine shop that can bevel the holes