M923 MWO Identification

My new M923 has five modification work orders (MWOs) listed on the door frame. I've identified all but one, and have downloaded the details of two of them from LOGSA. The remaining two are up on LOGSA, but are distribution codes b/c, so I can't download them. These are the MWOs listed on my truck:

Do any of y'all know what the -20-2 MWO changed, and/or where I can find the documentation for it?

Is there some way for me to legally get my hands on the documentation for the -24-1 and/or -35-1 MWOs?

20-2 is the seatbelt MWO.

emmado22 said:

20-2 is the seatbelt MWO.

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Do you know any details about what it changed? This is the only M9xx truck I've ever sat in, so I don't have any experience to compare it to.

The MWO added seatbelts to the cab.

Oh, I didn't realize that they didn't always have seatbelts. Yikes!

Not that it is a "legal" copy, but I googled
"MWO 9-2320-272-24-1: Service brake control valve improvement"
and found several sites that had the .pdf on the first page of results.

Googling
"MWO 9-2320-272-35-1: ABS upgrade"
found a .pdf that tells how to find improperly installed MWOs (on a very familiar site...).

I have the docs on checking for improperly installed ABS systems from that wonderful site already, and that's definitely on my list of things to inspect on my truck very soon!

Where can you find the list of all mwo for a particular series like the M939's?

I am not finding the link for the
MWO 9-2320-272-24-1: Service brake control valve improvement
PDF file.
I have been having a brake problem and this maybe something to check, Could you list a link to the pdf?

Thanks!

juanprado said:

Where can you find the list of all mwo for a particular series like the M939's?

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I don't know how to find a complete list. I went to LOGSA and entered a publication number of "MWO 9-2320-272" into the search page to find all of the documents whose pub. numbers started that way. That got me a list of all but one of the MWOs listed on my truck, plus some others that aren't applicable to it, and/or just weren't applied.

One little hint: When searching for all of the manuals for a vehicle by a partial TM number, typing in something like "TM 9-2320-272" will only get the manuals with "TM 9" numbers. There are commonly other interesting manuals, too: the lubrication order starts with "LO 9", modification work orders start with "MWO 9", and there's often a transportability guidance starting with "TM 55". There may also be other things like technical bulletins starting with "TB", and even other stuff... I was surprised myself the first time I saw a "SMARPI 9-..." number, even though I've been doing this stuff for years. So, try typing a shorter portion of the number such as "2320-272", and you may get many more useful hits.

For example, if I type in "TM 9-2320-272" in the pub. number field to get M939 series manuals, I get 8 hits. If I type in "2320-272", I get 21 hits. Typing the model number into the title field may or may not produce the same manuals, and may or may not also produce hits for things like radio installation manuals. So if you're digging deep, try searching on the model number in the title field first, and then once you identify the main manual number series for that item, also search on portions of the manual number(s) in the pub. number field.

Pretty fun reseaching all these litte MWO's...LOL. Do you have a depot truck?

wsucougarx said:

Pretty fun reseaching all these litte MWO's...LOL. Do you have a depot truck?

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I'm not sure what you mean by "depot truck". Mine had an overhaul in 2009 at Red River Army Depot, and it doesn't appear to have been issued since then. It has no unit markings, and it came with the basic issue items in a wooden crate on the passenger's seat (WOOHOO!). Its original date was 1984. So in some ways it's a new truck, and in other ways it has a coat of paint over the old dirt! I found signs of tan paint where the new CARC didn't cover fully, or was blocked by a strap or bracket, so maybe it was "over there" before its rebuild? Anyway, I think it's the new star of my collection, and my HMMWV has dropped into second place.

OK, I've got a RRAD truck as well. I contacted RRAD to inquire about what they actually do to the M923's. RRAD would typically get all the SouthWest Asia truck (M939's in RRAD's case) and they'd go through them. Among other things, they re-CARC'd all the trucks back to 3 color NATO camo, changed out to Hawker's batteries, and installed hardtops in many cases. The trucks are NOT rebuilt at all. They just went through and retested everything. In none of the phases of RRAD are the trucks actually disassembled like you would find in an actual rebuild scenario. Luckily my truck had a bad engine and something wrong with it's tranny and transfer case when it went to RRAD. What I got is a newly rebuilt motor (European rebuild tags, newly rebuilt tranny, and newly rebuilt transfer case. The truck has about 2000 miles on her from it's time at RRAD. My deuces have all dropped to last place.

Ah, thanks for the info! Well, it's too bad that mine wasn't a full rebuild then. But it sure does look pretty, and it has 4 nice 6TMFs in it. I wish that they had put a hard top on mine. It does have new tires, too.

I tried going to LOGSA and my computer does not like the site.
It gets a Certificate error.

The the doc I found was actually-
MWO 9-2320-272-24-1: Spring brake control valve improvement
Maybe not the same ?
The google link was-
http://www.google.com/url?sa=t&rct=...sg=AFQjCNEOlrfmeG0Xizf4t2G4D-OfkDwhvg&cad=rja


For the bad certificate on LOGSA, that is just because your browser doesn't recognize the .mil certificates. You can safely tell your browser to ignore the error and continue to the site. (Note that ignoring those errors is generally a really bad idea if you are not sure of the site !!)

You're probably right about it being for the spring brakes. I think the title on LOGSA said something like "S BRAKE CONTROL VALVE...", and I probably mis-guessed the abbreviation.

Now that I've read the -24-1 (spring brake valve) MWO document, I can see that the MWO wasn't actually applied to my truck, despite being listed on the MWO plate. My truck has the unmodified parking brake lever and the original spring brake valve bracket.

runk said:

The the doc I found was actually-
MWO 9-2320-272-24-1: Spring brake control valve improvement
Maybe not the same ?
The google link was-
http://www.google.com/url?sa=t&rct=...sg=AFQjCNEOlrfmeG0Xizf4t2G4D-OfkDwhvg&cad=rja


For the bad certificate on LOGSA, that is just because your browser doesn't recognize the .mil certificates. You can safely tell your browser to ignore the error and continue to the site. (Note that ignoring those errors is generally a really bad idea if you are not sure of the site !!)

Click to expand...

Thanks for the info and the post!!!

I've found a site that seems to have all the MWO publications listed where you can download the entire MWO for each one

http://trucks5ton.tpub.com/