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Air manifold thing?

What is this manifold for? And what are the 2 brake switches for? It's in front of the Air tanks under the coach. I thought all my brake switches were under the dash.
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 

Re: Air manifold thing?

Reply #1 –
Quote from: dlkj07 –
What is this manifold for? And what are the 2 brake switches for?
That looks kinda like your front 6-pack manifold.  If so, what you call "brake switches" are actually pressure switches for the leveling system.  See diagrams below:

However, I could be wrong.  The air lines don't look right for the front 6-pack.  There should be two additional air lines connected to the open holes above the bottom air line.  I'm not sure what that thing is.....?

If you wish to gain more than a rudimentary understanding of your coach's leveling system, I would suggest reading the textbook linked below, and also available in our excellent Forum Library:

https://www.foreforums.com/index.php?media/item/hwh-air-leveling-textbook.1458/

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Air manifold thing?

Reply #2 –
Quote from: Chuck & Jeannie –
That looks kinda like your front 6-pack manifold.  If so, what you call "brake switches" are actually pressure sensors.  See diagrams below:

However, I could be wrong.  The air lines don't look right for the front 6-pack.  There should be two additional air lines connected to the open holes above the bottom air line.  I'm not sure what that thing is.....?

If you wish to gain more than a rudimentary understanding of your coach's leveling system, I would suggest reading the textbook linked below, and also available in our excellent Forum Library:

https://www.foreforums.com/index.php?media/item/hwh-air-leveling-textbook.1458/
I'm learning more all the time about this thing...of course usually when something breaks. I definitely read up on it, thank you.
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 

Re: Air manifold thing?

Reply #3 –
Is Dylan's coach an IFS and if so might it only have two airbags in the front?
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI

Re: Air manifold thing?

Reply #4 –
Dylan,

How about George's question above: do you have IFS?

Also, do you have the air system schematic for your coach?  If so, it should show both the front and rear HWH 6-pack manifolds.  You can look at the white ID labels on the air lines in your photo, then compare the line IDs to your schematic to identify the mystery manifold.

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Air manifold thing?

Reply #5 –
Quote from: Chuck & Jeannie –
Dylan,

How about George's question above: do you have IFS?

Also, do you have the air system schematic for your coach?  If so, it should show both the front and rear HWH 6-pack manifolds.  You can look at the white ID labels on the air lines in your photo, then compare the line IDs to your schematic to identify the mystery manifold.
Yes, I have IFS...so that makes sense that there's only 2 air lines.
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 
 

Re: Air manifold thing?

Reply #6 –
Dylan,

Now you've got my curiosity aroused.  I would like to understand how your suspension is configured.

In our Forum Library I can only find one air system schematic for ANY model with IFS suspension, and it is for a later model IH-45/Phenix.  I'm not sure how close this system would be to your 2001 U320.  See link below.

https://www.foreforums.com/index.php?media/item/b-3302-ih-45-air-diagram.5020/

The IH-45 schematic I found only shows 3 air lines going to the front 6-pack manifold, while in your photo it appears that your manifold has 5 air lines connected(I can't be sure about that...).  It has a note referring the viewer to another air suspension drawing B-3321, which we also don't have in our library.  :'(

If it's not too much hassle, I would like to see some additional photos showing both sides of the manifold in your original post.

If you DO have the air system schematics for your coach, it would be great if you could upload a copy of the files, or nice clear photos of the schematics.  You could upload them either to this thread or directly to the library.  This would add value to our library AND it would help me understand how your IFS suspension works in conjunction with the HWH leveling system.

 

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"