anyone know what this is?

[diverman555]

I am trying to get my M923A1 running and have no knowledge of them. I climbed in the cab and between the 2 seats is the parking brake, right behind that I found 3 copper lines about 1/4" with fittings on them and a bracket right in front of the lines.
Does anyone know what goes there and those lines connect to.?
Thanks

 

[73m819]

the -10 should have a pretty good cab contol layout

 

[73m819]

KEY #15, page 2-5, in the -10 just might give you a CLUE as what air switch is supposed to be there

I have said it before and I'll say it again, YOU REALLY NEED TO READ THE TMs, ESPECIALLY the -10
and again you can find them here

You can find the TMs here
UPDATED LIST
-=-=-=-=-=-=-=-=-=-=-=-=-
http://www.steelsoldiers.com/technical-manuals/
OR
http://www.jatonkam35s.com/
OR
http://www.liberatedmanuals.com/
OR
http://fmvowners.com/index.php
OR
http://www.army6x6.net/p/service-manuals.html
OR
http://www.militarytrucks.ca/m135.htm ------Canadian trucks
OR
http://www.morsegroup.org/america1.htm --Military Radios
OR
https://www.logsa.army.mil/etms/ind...5fb95459e-A3015A99-D14A-19E1-238F1793FB3D9566
This is the mil. TM web site,
--says bad cert., click to go anyway,