M939A1 Series WHERE in TM's wheel splitting?

[Artisan]

I just can't find it.

Where in the M939 TM's does it tell you exactly how to split these rims and
replace a tire on a rim. Thank but I want to read what the book says EXACTLY.

Does anyone know where it is???????????????????????????

Where exactly are the part numbers for the O-Rings and tire valves?

please.

 

[Bighurt]

Tube and Tire service;

Chapter 3 task 220, page 3-626 of TM 9-2320-272-24-2 is where it starts for M939 and M939A1/A2 follows.

IPB of tire breakdown;

Page 291-1 of TM 9-2320-272-24P-1

 

[M35A2-AZ]

Here is the p/n 12363606.

 

[Bighurt]

Here is the p/n 12363606.

That is the one furnished by US ARMY TACOM.

9LCB21018952 is manufactured by Milcom Technical Inc.

In my experience it's hard to find crosses of TACOM procured parts, except through GL by NSN 5331-01-314-7598.

 

[Artisan]

I am still stirring up dust here but looks like there are;
5/8" Split Rim Studs
and
3/4" Split Rim Studs
and I "think" they each take a different O-Ring!

BUT, I was just told by an old timer that the larger of the 2 O-rings will
work in both...FWIW.


There is conflicting info all over the place on these o-rings. We need
a resident geek to make a tell all I guess. I don't have time right
now to link to all the crap I found in the past 2.5 hours but it is
nuts. the different retailers have different info, docs are different,
and then there are 400 opinions...

I found GEMPLERS has 2 different 20" O-Rings for about $3.00 an O-ring,
I grabbed a couple each.

CLICK HERE


I believe ERIKS has the "Turret Valve" that is another thing the NAME of it PUNT!


Thank you BIG and ALbert! / All

PS, the story I just got from an old timer is the 5/8" studs came out first and there were problems.
Then they changed to a 3/4" stud and I think a bigger O-ring. THEN they went to a 20 stud set
up and I bow out here...

 

[juanprado]

There is 2 styles of rims with different size studs that use different thickness of o rings.

 

[emr]

Yes juanprado is correct. Some one may have stuffed a larger O ring and it may have worked, but >>>maybe<<< is the key, this Hobby more than most is full of ... Hey a guy told me .. hey he said He was in the military and said ... He said he knows a guy who ... An Ol timer said ... LOL... Use the correct part for the job specified and you will be ahead of the game, There are those who jury rig things, Its up to the individual, if you would break a nut splitting those rims and go thru the whole task on a chance a different size would work, well I for one wish you luck it does. but if it does not blame no one but you know who )))) Just use the correct one and do it right, its always better , Its always worth asking, U will get different answers, I usually go with mine listed here when ever possible .. There is a reason things are made for specific other thing s )) Good luck ...

 

[1 Patriot-of-many]

All I know is I'm having a bitch of a time getting the large part of the rim out of the **** tire on a M35A3. About ready to throw in the towel and take it to a shop. Good luck.

 

[Artisan]

All I know is I'm having a bitch of a time getting the large part of the rim out of the **** tire on a M35A3. About ready to throw in the towel and take it to a shop. Good luck.

Did you turn it upside down over the top of maybe a log round and
go after it w/ a sledge hammer? I will be catching up to you soon
doing that task! Yikes!

Right now the 15/16" nuts are ON THERE HARD. I put a 36" pipe
wrench on a socket and had the wife stand on the wheel and
alls I did was turn the whole wheel. I then stood the tire up
and put it against a trailer and same thing, I just spin the tire.

I am looking at 3/4" drive sockets then a 6' cheater next, if I still
spin the tire I will remount it on the truck w/ the brakes on
THEN it will come undone or something WILL break, and it will
not be me...

Leftie Loosie!

 

[1 Patriot-of-many]

Did you turn it upside down over the top of maybe a log round and
go after it w/ a sledge hammer? I will be catching up to you soon
doing that task! Yikes!

Right now the 15/16" nuts are ON THERE HARD. I put a 36" pipe
wrench on a socket and had the wife stand on the wheel and
alls I did was turn the whole wheel. I then stood the tire up
and put it against a trailer and same thing, I just spin the tire.

I am looking at 3/4" drive sockets then a 6' cheater next, if I still
spin the tire I will remount it on the truck w/ the brakes on
THEN it will come undone or something WILL break, and it will
not be me...

Leftie Loosie!

Air tools are our friends....... Didn't have any problems getting the nuts off or the shorter rim. I had the large rim suspended from my wrecker and got pretty far off, couldn't get it all the way off, lowered it to the ground and the rim went back to starting over.....LOL. I'm going to get some silicone lubricant and some 8x8 wood and try again on the ground tomorrow. I can't imagine what a bitch it is for soldiers in the desert, or in the field even without airtools.

 

[juanprado]

M939 Specific Tire/Rim instructions

The info you seek is also in TM 9-2610-200-14 Tires and Tubes

Check out section 2-30 pg 2-47

 

[Motorcar]

My 1/2" drive impact with 125 psi took the nuts off the 10 studs. I tried with a 3/8" ID supply hose but it didn't have enough air volume. Changed to a 1/2" hose and it ripped them right off. The O-ring was easy to change and reasemble. The run-flat insert inside the tire made it HEAVY to stand back up, two man job for that.

 

[tractors0130]

Easy to do with a 3/4" gun and impact socket, a little soap and water around the rim and use a duck bill hammer and tire spoons to separate. Or take it to a tire shop and watch how easy they make it look, they usually don't charge much and can show you some pointers if you want to try it again.