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Air system parts

I have a leak in my slide air system even with the cutoff valves turned off. I would like to replace the regulators and valves and maybe some of the  other components mounted on each of the manifolds. However, I don't know what they are or what they do. Can someone please help me with this? I will try to post a picture.

Thamks, Royce
Royce & Denise, MC #17410
'01 U320 4220 ISM450 Build #5895 SOLD
Toad: '10 Honda CR-V

Travel makes one modest. You see what a tiny place you occupy in the world. - Gustave Flaubert

Re: Air system parts

Reply #1 –
I do not have a slide but the unit top left is a solenoid and the one below it is a vacuum pump for the bladder.
Others not sure but bottom right looks like maybe a pressure valve.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Air system parts

Reply #2 –
You might contact HWH and review problems with them. Welcome to HWH Corporation

If/when you call them be prepared to wait for a return call from them.  Could be days/weeks, but worth the call.  ;D
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320

Re: Air system parts

Reply #3 –
The two marked "What is this device" both appear to be electric solenoid valves - they look very similar to the ones used on the 6-pack manifolds (leveling system).  Probably a brass valve body with a electric coil on top.  I would guess they could be rebuilt just like the 6-pack valves...might even use the same parts.  The "PIAB" thingy - no clue - I'd take John's opinion on it.
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 system parts

Reply #4 –
Foretravel parts department can identify these for you.  Give Billy Jack a call, he will be able to identify from a verbal description.
Current coach 1996 U320 40'
Previous coach, 1990 36' U280

Re: Air system parts

Reply #5 –
Does the regulator just unscrew from the manifold? How is it removed?

Edit: I figured it out from reading the writeup by Dick & Rocky on beamalarm.com. Thanks to Dick & Rocky for that article.
Royce & Denise, MC #17410
'01 U320 4220 ISM450 Build #5895 SOLD
Toad: '10 Honda CR-V

Travel makes one modest. You see what a tiny place you occupy in the world. - Gustave Flaubert

Re: Air system parts

Reply #6 –
Royce,

I currently have a leak in my manifold assembly.  I plan to dig into the issue more when I get home from our current trip in about 2 weeks.  I can hear the leak in the manifold but have not been able to find it with bubble spray yet.  I am able to isolate it by turning off the valve on the left of your picture and then the 12V compressor does not run every 2 hrs.  After talking to HWH, a new replacement manifold is about $620 and a complete rebuild will be $434 max, could be less depending on what is needed. 

if you still have a leak in the system with the valve turned off, your leak is probably between the compressor and the manifold assembly.

I'd call HWH and get in the queue for technical support.  They are very helpful but do take awhile at this time due to the busy season.

Rich
Rich and Peggy Bowman
2002 U270 3610 WTFS, build #5939--"Freedom"
2022 Jeep Grand Cherokee Summit 4xe
SMI AirForceOne brake system
PakCanoe 15

Re: Air system parts

Reply #7 –
Rich,

I am making some assumptions here, but it seems to me that that manifold is just a block of aluminum with some passages and holes for the various devices. So it seems to rebuild it you would only need to replace the defective components attached to it, e.g. the regulator, vacuum pump, solenoid, etc. Someone please correct me if I am wrong, but I don't like to hire someone to do something that I can do. I don't learn much like that.

Royce
Royce & Denise, MC #17410
'01 U320 4220 ISM450 Build #5895 SOLD
Toad: '10 Honda CR-V

Travel makes one modest. You see what a tiny place you occupy in the world. - Gustave Flaubert

Re: Air system parts

Reply #8 –
I think I know the various components are now. I found a post by Barry Beam of an air connection diagram that v explains most of them. The one labeled PIAB is a vacuum pump, I think.

Royce & Denise, MC #17410
'01 U320 4220 ISM450 Build #5895 SOLD
Toad: '10 Honda CR-V

Travel makes one modest. You see what a tiny place you occupy in the world. - Gustave Flaubert

Re: Air system parts

Reply #9 –
A simple Google search of "piab" takes you to the PIAB site, for vacuum parts.
Dave Cobb
Buckhorn Lake Resort The Club, #6202, Kerrville TX
check the map.  I do rent it out when I am traveling!
2001, U320, 36' #5887, in Kerrville, FT Club #17006, (7/23 to present)
2024 Jeep Grand Cherokee L, Summit, white
EX: 98 U295, 36' #5219, (mid door), (4/13-10/23)
EX: 93 U225, 36' (4/11 to 4/13)

Re: Air system parts

Reply #10 –
Quote from: BamaFan –
So it seems to rebuild it you would only need to replace the defective components attached to it, e.g. the regulator, vacuum pump, solenoid, etc. Someone please correct me if I am wrong, but I don't like to hire someone to do something that I can do. I don't learn much like that.
Royce,

You are not wrong.  The HWH manifolds are mechanically very simple.  You don't necessarily have to replace each component.  In many cases, it will only require a new O-ring or seal to restore correct function.  I'm betting the 2 solenoid valves are very simple inside - 2 or 3 O-rings and possibly a "plunger" just like the ones in the 6-pack valves.  The pressure regulator can certainly be disassembled and cleaned out, often all it takes to fix it.  If you can do without the slide seal function for a while, pull the manifold out of the coach and take it apart on your work bench - see what it needs.  You might be surprised how simple it is to repair!

HWH Air Seal Manifold Rework Instructions

Air Regulator Repair on 2003 Slide

HWH Solenoid Valve Disassemble
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 system parts

Reply #11 –
did you have to drain the air before you took the regulator apart or did you just turn the manual shut off valve to off ?
And when you took it apart did you mark the regulator cap so it would be set at 12 psi again ?
Rob Barb & Pyper
2002  U320  40'
2010 Suzuki Grand Vitara

Re: Air system parts

Reply #12 –
Rob,

Marking the adjustment cap on a regulator might get you back in the "ballpark" after a rebuild.  The preferred procedure would be to (temporarily) install a pressure gauge downstream of the regulator, and then adjust the regulator to achieve the desired output pressure.
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 system parts

Reply #13 –
It looks like the little rubber piece is the culprit , are they available  some where in case they are to far gone ?
You did not tel me about the air . Drain down  or turn the valve ?
Rob
Rob Barb & Pyper
2002  U320  40'
2010 Suzuki Grand Vitara