What is the name of panel of rotary switches that direct air to the cab, suspension?

Whatever good idea fairy lead to the fluid they used, I am sure the reason wasn't lack of money. Maybe they just thought they had enough 18 year olds to change the fluid on an interval. I've actually never looked in the TM to see what the r/r interval is supposed to be. Maybe they wanted to use some oil they had in inventory (like we have engine oil in the tranny). Who knows. Sorry to hear of your woes though because getting that manifold off sucks. In case you are wondering, no, they didn't give you any slack in the hoses. I was pretty tempted to have the local hydro place make up extensions just to get another 4-6" so the next time the manifold comes off I won't be cussing at it, trying to get my hand and a spanner in that cramped space to turn the lugs 1/3200000th of an inch each time. You'll see...

It could be the cylinder for cab lift.
My tire cylinder went bad worked fine then I decided to paint spare and tire would not lift by control box so I tried hand pump it moved a little and hand pump got so hard you could pull handle down.
Turn valve on control box back to cab lift and you could hear and feel the pressure relief.
Changed tire ram all is well.

Coffey1 said:

It could be the cylinder for cab lift.
My tire cylinder went bad worked fine then I decided to paint spare and tire would not lift by control box so I tried hand pump it moved a little and hand pump got so hard you could pull handle down.
Turn valve on control box back to cab lift and you could hear and feel the pressure relief.
Changed tire ram all is well.

Click to expand...

Interesting. Did you use OEM or universal rams?

aleigh said:

Whatever good idea fairy lead to the fluid they used, I am sure the reason wasn't lack of money. Maybe they just thought they had enough 18 year olds to change the fluid on an interval. I've actually never looked in the TM to see what the r/r interval is supposed to be. Maybe they wanted to use some oil they had in inventory (like we have engine oil in the tranny). Who knows. Sorry to hear of your woes though because getting that manifold off sucks. In case you are wondering, no, they didn't give you any slack in the hoses. I was pretty tempted to have the local hydro place make up extensions just to get another 4-6" so the next time the manifold comes off I won't be cussing at it, trying to get my hand and a spanner in that cramped space to turn the lugs 1/3200000th of an inch each time. You'll see...

Click to expand...

Oy.....Yet another adventure in busted knuckles and wallet robbery.

https://www.amazon.com/dp/B00GP3GDDE/ref=nav_timeline_asin?_encoding=UTF8&psc=1

Think I'm going to use this aviation hydraulic fluid.

bump

So it appears that the ram for the cab is locked up. When I remove both hydraulic lines, it stays elevated. I ordered a new heavy duty ram from Will. Hopefully it will fit.

So uh the original fluid is apparently H5606 (for trivia's sake), and I went with Mil H 23282. This is the synthetic version of 5606. Overkill: probably. Both 23282 or 5606 are going to be anti-corrosive.

aleigh said:

So uh the original fluid is apparently H5606 (for trivia's sake), and I went with Mil H 23282. This is the synthetic version of 5606. Overkill: probably. Both 23282 or 5606 are going to be anti-corrosive.

Click to expand...

Looks like all this hydraulic fluid is toxic.

Reworked LMTV said:

Looks like all this hydraulic fluid is toxic.

Click to expand...

At least it's not skydrol...

Anyone know why some manifolds for LMTVs have two valves at the bottom, and others only one?

On the A0 trucks the -24P specifies two parts. 12420621 and 12420621-001. The latter is CAGE 0FW39 (BAE) and the latter is CAGE 19207 (US Tank Automotoive Cmd). They do the same job but the valve arrangement and subparts different, so they call it out. The NSN is 4730-01-457-8479 and when you look this up you see they were also manufactured at times by 09990 (Parker) and 0PFG7 (SFX Fluid Power).

The single valve manifold is different: 12423160-001 and is manufactured by 0FW39 and 19207, plus 0PFG7 (SPX Fluid Power). Reqs for this part NSN 4730-01-527-8543 started in 2008. This is the manifold with the single air switch. The switch that is missing appears to be the air-ride cab bags.

SO

My theory on this is that the single-switch, newer version is for the armored cabs, which probably don't have an airbag setup due to the weight?

I am going to jump in here. Dosnt your manual have a UOC, (Usable on Code codes) next to the parts listings? Normaly, thats how the army tells you what part fits what model.

Guyfang said:

I am going to jump in here. Dosnt your manual have a UOC, (Usable on Code codes) next to the parts listings? Normaly, thats how the army tells you what part fits what model.

Click to expand...

If someone knows how to look that up... I've checked the usual online databases and they don't seem to have the UOC information. In the TM (-24P) it assumes you want to use it on a FMTV since that's what the manual is for.

OK, is the manual in the SS forum? If so, give me the number. I will take a look see.

Tm 9-2320-365-24p

And the exact model number of the truck, along with NSN. I forgot to ask for that.

The question is what vehicles is NSN 4730-01-527-8543 for. If we knew the NSNs for those vehicles, it wouldn't be a mystery...

The explanation for the UOC is on Page, (PDF reader page number) 19.
Look at the cover of the TM. Find your NSN.
Look to the left, thats your truck.
Go to page 19, and you will find this list below.

Code Used On

Trk, Car., LMTV M1078
UOC: LWB *W/WN
UOC: LAB W/O WN


Trk, Van, LMTV M1079
UOC: LWD *W/WN
UOC: LAD W/O WN


UOC: LAA Trk, Chas, LMTV M1080


Trk, Car., LMTV/AIRDROP M1081
UOC: LWC *W/WN
UOC: LAC W/O WN


* = With PTO.

The listing below is an example. Lets look at the wire harnes (part number 12420887) listed below. Notic the UOC listed at the end of the part listing. That wire harnes ONLY fits a UOC LAD and LWD. Look at the llist above, and you will see what trucks it fits. The wire harnes fits: LMTV 1079, WO/WN and the LMTV 1079, *W/WN. The astric means the truck has a PTO.

GROUP 0613: HULL OR CHASSIS WIRING
HARNESS
FIG.107 AUXILLARY PANEL CABLE
ASSEMBLY
1 PAOOO 0FW39 12420887 WIRING HARNESS,BRAN................. 1
UOC:LAD,LWD,

2 MOOZZ 0FW39 12420924-005X .TUBING,NONMETALLIC MAKE FROM V
TUBING P/N 12420924-005 (0FW39) X
1270 MM.............................
UOC:LAD,LWD,

3 PAOZZ 81349 M43436/1-3 .BAND,MARKER........................ 4
UOC:LAD,LWD,

4 PAOZZ 09922 SM16M-1TK6 .CONTACT,RECEPTACLE................. 3
UOC:LAD,LWD,

5 PAOZZ 58536 A-A-55464-07 .CONNECTOR BODY,PLUG (J912)........ 1
UOC:LAD,LWD,


Was this any help? Look the parts up you need, and see what UOC fits your truck.

aleigh said:

The question is what vehicles is NSN 4730-01-527-8543 for. If we knew the NSNs for those vehicles, it wouldn't be a mystery...

Click to expand...

Then look up NSN 4730-01-527-8543. See what UOC is listed next to it.