How does CTIS work? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Miscellaneous > General Chit-Chat
Notices

Reply
 
Share Thread Tools Display Modes
Old 09-15-2013, 03:44 PM   #1 (permalink)
Registered User
 
Join Date: Jan 2003
Member # 16468
Location: New Haven, CT
Posts: 931
How does CTIS work?

Wondering how central tire inflation works in a solid axle. This is the closest I've found, and for a portal it looks like a fairly simple setup.



How do they do it in a solid axle without external air lines?
__________________
1969 Jeep M715 6x6 6BT/NV4500/NP202.5 D60/70/70
1963 Jeep J300, 4BT/NV4500/NP200/D60/60
Mikel is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 04:50 PM   #2 (permalink)
Registered User
 
fart_plume's Avatar
 
Join Date: Apr 2011
Member # 188473
Posts: 133
When I first read the title, I thought you were asking how CLITS work.................
fart_plume is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 05:10 PM   #3 (permalink)
Registered User
 
Join Date: Sep 2005
Member # 53453
Location: Eh?
Posts: 1,639
Generally CTIS doesn't work.

There's multiple ways to attempt to make it work for a solid axle. Normally it's just as simple as there being a couple extra seals between the hub/spindle, and that area is pressurized via a drilled passage in the spindle, and the hub is drilled/tapped to allow an air line to be attached to it at the pressurized area. Or something like that.
__________________
Time is the only real currency.
DirtyComanche is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 05:15 PM   #4 (permalink)
Rock God
 
crashhawk's Avatar
 
Join Date: Jun 2008
Member # 115887
Location: Somerset, Ky
Posts: 1,152
If can remember I'll post up a schematic from the shop tomorrow. But the simpler set ups work just like you posted.
__________________
God hates a coward.


Nolite esse canis praecisae
crashhawk is online now   Reply With Quote Quick reply to this message
Old 09-15-2013, 05:20 PM   #5 (permalink)
Registered User
 
Join Date: Sep 2005
Member # 53453
Location: Eh?
Posts: 1,639
Quote:
Originally Posted by crashhawk View Post
If can remember I'll post up a schematic from the shop tomorrow. But the simpler set ups work just like you posted.
The schematic he posted is from the H1, or HUMVEE? It works that way, and can work that way, because the output gear in the portal box is supported from both ends and can be drilled for an air passage. You can't do that (easily) with an axle shaft that uses u-joints, as it flops around in there a bit too much Probably could make something like that work with CV joints if you wanted to, but I think it would be making an unreliable system even more unreliable.
__________________
Time is the only real currency.
DirtyComanche is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 05:33 PM   #6 (permalink)
Not so funny meow?
 
clastic's Avatar
 
Join Date: Jan 2011
Member # 180649
Location: TYS
Posts: 1,014
Sounds like a job for mogger. Oh wait
__________________
Quote:
Originally Posted by xj chopper View Post
I wonder what a place on the interwebs would be like for wheelers to come for tech and not have to be pc. A place like no other..a place that does not get sold to snow backs and the previous owners pop back in only to show us how they are spending the money.
clastic is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 07:51 PM   #7 (permalink)
Registered User
 
Join Date: Dec 2011
Member # 207000
Location: in a house
Posts: 9
Out of all the army junk I've driven, every rig was inop. Or rendered inop. Because of sealing issues. It seems like a good system in theory, but like most in life, real world conditions prevail

Last edited by donald kerabatsos; 09-15-2013 at 07:51 PM.
donald kerabatsos is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 07:56 PM   #8 (permalink)
Registered User
 
Join Date: Sep 2005
Member # 53453
Location: Eh?
Posts: 1,639
Quote:
Originally Posted by donald kerabatsos View Post
Out of all the army junk I've driven, every rig was inop. Or rendered inop. Because of sealing issues. It seems like a good system in theory, but like most in life, real world conditions prevail
If it makes you feel any better, the systems on the MAN, Tatra, Kraz, etc, trucks are apparently fairly reliable.

It's just the N. American stuff that doesn't work
__________________
Time is the only real currency.
DirtyComanche is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 08:13 PM   #9 (permalink)
Registered User
 
Join Date: Dec 2011
Member # 207000
Location: in a house
Posts: 9
We had a pretty reliable system. Us standing at each tire for a goddanged hour airin' them back up to 60 psi with a friggin' airchuck.
I guess that's why we never aired down for ops. Airing up super singles on a five ton is a bitch

Last edited by donald kerabatsos; 09-15-2013 at 08:14 PM.
donald kerabatsos is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 08:24 PM   #10 (permalink)
Granite Guru
 
ProjectTwin's Avatar
 
Join Date: Apr 2003
Member # 19156
Location: Honolulu, HI
Posts: 623
Quote:
Originally Posted by fart_plume View Post
When I first read the title, I thought you were asking how CLITS work.................
That whole area is a medical mystery.
__________________
A good paragraph should be like a skirt. Long enough to cover the subject but short enough to keep your attention.
ProjectTwin is offline   Reply With Quote Quick reply to this message
Old 09-15-2013, 08:24 PM   #11 (permalink)
Registered User
 
Join Date: Mar 2002
Member # 10867
Location: HELL PASO
Posts: 917
Quote:
Originally Posted by donald kerabatsos View Post
Out of all the army junk I've driven, every rig was inop. Or rendered inop. Because of sealing issues. It seems like a good system in theory, but like most in life, real world conditions prevail
Quote:
Originally Posted by DirtyComanche View Post
If it makes you feel any better, the systems on the MAN, Tatra, Kraz, etc, trucks are apparently fairly reliable.

It's just the N. American stuff that doesn't work
Depends on the junk. The M939-series was junk CTIS. The same system was used on the early LMTVs.

The OSHKOSH system was pretty pimp. Eventually the axle seals would fail or the main diaphragm would let go, but that was after over a decade of military service. Once the system would be refurbed, it would work great for another 10 years or so.
__________________
[QUOTE=Mrs.CSR;14024539]You were good[/QUOTE]
DRTDEVL is offline   Reply With Quote Quick reply to this message
Old 09-16-2013, 03:01 PM   #12 (permalink)
Registered User
 
Join Date: Jan 2003
Member # 16468
Location: New Haven, CT
Posts: 931
Btt :d
__________________
1969 Jeep M715 6x6 6BT/NV4500/NP202.5 D60/70/70
1963 Jeep J300, 4BT/NV4500/NP200/D60/60
Mikel is offline   Reply With Quote Quick reply to this message
Old 09-16-2013, 03:08 PM   #13 (permalink)
Texas by GOD
 
Join Date: Mar 2006
Member # 69765
Location: Fort Worthless, TX
Posts: 2,125
the more or less ghetto way to get it done and not compromise axle strength.
__________________
~ Kyle
1999 Land Rover Discovery II - Lift, Tires, Axles, Stuff. /forum/land-rover/924588-my-d2-axle-swap-thread.html
Follow my adventures on Instagram: https://instagram.com/1kilotango/
Kyle_T is online now   Reply With Quote Quick reply to this message
Old 09-16-2013, 03:11 PM   #14 (permalink)
I See You
 
Provience's Avatar
 
Join Date: Jul 2009
Member # 138976
Location: Newport News, VA
Posts: 4,763
Quote:
Originally Posted by Mikel View Post
Btt :d

Trucks 2.5 Ton M1078 Maintenance Manuals

edit: pictures in the -24p

http://trucks25tonv1-2.tpub.com/TM-9...65-24P_390.htm
__________________
Up is difficult. Down is dangerous.

I Like Bright Colors and Shiny Objects

Romans 1:28-32/Matthews 7:15-20/John 14/Surah 109

Don't be a cunt; donate to the CaryW fund.http://tiredofvsbs.com/caryw/


For the best deal on 8 lug disc brakes click here--> www.lugnut4x4.com

Last edited by Provience; 09-16-2013 at 03:14 PM.
Provience is offline   Reply With Quote Quick reply to this message
Old 09-16-2013, 04:45 PM   #15 (permalink)
Pirate4x4 Addict!
 
Beat95YJ's Avatar
 
Join Date: Aug 2003
Member # 22176
Location: Redondo Beach
Posts: 11,274
Quote:
Originally Posted by Kyle_T View Post
the more or less ghetto way to get it done and not compromise axle strength.
I have seen busses done this way also.
__________________
I can break a steel ball in a rubber room!

Quote:
Originally Posted by DirtyComanche View Post
If you can make wine in a toilet, you can make wine in Texas.
Beat95YJ is offline   Reply With Quote Quick reply to this message
Old 09-16-2013, 04:57 PM   #16 (permalink)
Registered User
 
coolcruiserfj40's Avatar
 
Join Date: Dec 2004
Member # 40057
Posts: 3,014
Guy down the street with an h1 has four flats atleast once a week
__________________
Me have A.D.D
coolcruiserfj40 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.

** A VERIFICATION EMAIL IS SENT TO THIS ADDRESS TO COMPLETE REGISTRATION!! **

Email Address:
Insurance
Please select your insurance company (Optional)

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 10:56 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.