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Old 01-20-2022, 10:32 AM   #1
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Pneumatic Systems

I'm in the process of replacing some of the 20 year old black pneumatic plastic suspension lines and was referencing drawing number D15993. However it turns out this drawing [although supplied with my coach] is not the correct one. It has a single height control valve for the rear of the coach and two height control valves for the front of the coach. This is the opposite of the configuration of my coach. It is dated January 1999 and my coach is a 2001 vintage.


Does anyone on the forum know the correct drawing number I should be using?
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Old 01-20-2022, 10:52 AM   #2
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Common in the industry:


Two on the rear axle, one in front is for solid front axle.


One on the rear axle and two in front is for IFS (Independent Front Suspension).


Yes, there ARE exceptions-- like the Alpine coaches/Peak chassis with four ride height valves.
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Old 01-20-2022, 01:47 PM   #3
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"One on the rear axle and two in front is for IFS (Independent Front Suspension)."

My coach has one valve in the front and two in the rear and I have IFS


Interesting that the OP coach and mine are only 133 build numbers apart and the suspensions aren't the same
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Old 01-20-2022, 02:00 PM   #4
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Quote:
Originally Posted by dons2346 View Post
"One on the rear axle and two in front is for IFS (Independent Front Suspension)."

My coach has one valve in the front and two in the rear and I have IFS

That would qualify as one of the exceptions.
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Old 01-20-2022, 03:50 PM   #5
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Quote:
Originally Posted by wolfe10 View Post
That would qualify as one of the exceptions.


A great number of CC have two in the rear and one in the front. Pretty common for all Dynomax chassis, my 2007 Allure included. Neway IFS.

Brian.
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Old 01-20-2022, 07:15 PM   #6
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Like others I also have one in the front and two in the rear. When parked rear does the side to side leveling and front is primarily fore/aft leveling. Holland/Neway IFS and rear axle.

Air lines are color coded for the brake system, but air bags are all black. Standard lines and push on fittings available at truck parts suppliers.
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Old 01-20-2022, 08:54 PM   #7
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Quote:
Originally Posted by dons2346 View Post
"One on the rear axle and two in front is for IFS (Independent Front Suspension)."

My coach has one valve in the front and two in the rear and I have IFS


Interesting that the OP coach and mine are only 133 build numbers apart and the suspensions aren't the same
This is exactly how my system is set up - one in front and two in rear, and I have IFS too. The OP's coach is right in between of ours, can't imagine his would be different.
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Old 01-21-2022, 07:20 AM   #8
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Quote:
Originally Posted by CountryFit View Post
This is exactly how my system is set up - one in front and two in rear, and I have IFS too. The OP's coach is right in between of ours, can't imagine his would be different.


I read his original post as the drawing shows 2 in front and one in rear, his coach is configured 1 in front and 2 in rear. I believe he is looking for the correct drawing, if you can confirm with your drawing package.

Possibly OP is interpreting drawing incorrectly?

Brian.
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Old 01-21-2022, 08:55 AM   #9
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I have a friend with a 2003 Intrigue with tag axle and his drawing is the same as mine [same CCI drawing number] it does not match his coach either which is set up like mine. My coach is not plumbed like that in the HWH operators manual either but it appears a line has been added to have air supply from both air tanks available.

On the drawing the second line that terminates at the two front height control valves, supplies air from the air tanks at the travel solenoid output.

My drawing lists item D64 Height control valve part of indep front suspension Qty 2. And item D61 Height control valve part of rear suspension Qty 1.

I have attached part of the drawing which is the front 6 pack and notice the 4 marked DEL [delete?].

The second drawing of the left side height control valve D64, that has 2 lines coming from the six pack and one is marked DEL? Is is repeated on the right side height control valve.

The third drawing shows the rear setup [notice the dual wheels] complete with rear six pack with only one height control valve.

Perhaps its a generic drawing and the DEL - delete for different configurations? Who knows.
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Old 01-21-2022, 09:26 AM   #10
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Just pulled out the bundle and found out that I have the same drawing #D15993 date 1-13-99.
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Old 01-21-2022, 02:28 PM   #11
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Interesting our '97 Intrigue, Gillig chassis, started out life with 2 leveling valves in front and one in the back. Based on a recall I changed the configuration to one in the front and two in the back. I believe the recall was due to inherent overweight issues on the driver's side of the coach.

The additional leveling valve in the back helps take off some of the weight off of the driver's side front axle.
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Old 01-22-2022, 05:46 AM   #12
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Quote:
Originally Posted by Ozzsp250 View Post
I have attached part of the drawing which is the front 6 pack and notice the 4 marked DEL [delete?].

Perhaps its a generic drawing and the DEL - delete for different configurations? Who knows.
Interesting comment from Boomper on the recall on his Gillig chassis, with the change in ride height control valve configuration.

The "DEL" on your pictures appears to be hand written; I have not seen this on any of my CC provided drawing package.

For what its worth here is the drawing from my 2007 Allure, effective 10th of May 2004 coach 31104 Allure (similar to Intrigue I suspect). Certainly now the Dynomax chassis. Possibly your coach was right in that transition zone. A call to Louie Courtemanche at Premier or a post on the Facebook forum CC Owners Group (he is there) may shed some light on the issue.
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File Type: pdf Chassis Pneumatic Auxilliary 2007 Allure.pdf (73.5 KB, 8 views)
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Old 01-22-2022, 08:26 AM   #13
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Thank you for posting the drawing, it appears to be accurate for my coach but without the Tag axle device being installed.

I do notice a pressure regulator in the system D120 on the new drawing Part # CC 33885, D60 on my drawing Part # 20562-1.

My manual does not give a setting for the regulator / protective valve looks like I need to phone Premier as I'm not a Facebook user.
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Old 01-23-2022, 05:21 AM   #14
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Quote:
Originally Posted by Ozzsp250 View Post
Thank you for posting the drawing, it appears to be accurate for my coach but without the Tag axle device being installed.

I do notice a pressure regulator in the system D120 on the new drawing Part # CC 33885, D60 on my drawing Part # 20562-1.

My manual does not give a setting for the regulator / protective valve looks like I need to phone Premier as I'm not a Facebook user.
You may be referring to the pressure protection valve - a check/regulating valve that closes at 65 psi in the event the auxiliary (leveling, air spring) system develops a catastrophic leak, closing off supply to that system and protecting the service brake/park brake systems.

You are in Phoenix I see; Eric Olstrom with Olstrom Custom Coach in Tuscon is a great resource for all things CC, Eric is an ex CC employee. His shop is very busy. Here is his link --> https://www.olstromcc.com/

Take Care!

Brian
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