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Need info on what this is

Went by to check something on my coach today. Heard the 12 V air compressor in the basement running and open the doors to investigate. This valve was open letting the air out and would not let the pressure buildup so the compressor was running continuously. What is this little device under this air bowl and where do these wires go. And how do I get it to close so the line will pressure up?
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.

Re: Need info on what this is

Reply #1 –
That's the auxiliary compressor's solenoid purge valve.  I believe it is normally open and when the compressor comes on 12VDC is applied which closes it. You might remove the bowl and have a look at the valve to see if something is physically keeping it from closing and/or follow the two wires to see what energizes them.  It may be the solenoid that most of the other wires in that system are attached to.

 

Re: Need info on what this is

Reply #2 –
Quote from: Travelin' Man –
That's the auxiliary compressor's solenoid purge valve. 
 

Yes, and the bane of many (ok, two people I know  ;)  ).  Corrosion, debris, etc. can cause problems sealing when the aux compressor runs.

HWH Solenoid Valve Rebuild
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Need info on what this is

Reply #3 –
What's the white substance in the bottom of the bowl and in the valve opening?  It almost looks like it could be desiccant powder or mineral build-up.

Re: Need info on what this is

Reply #4 –
Mineral deposits or general crud.  No dessicant dryer in 2000.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Need info on what this is

Reply #5 –
That bowl is also notorious for developing cracks at the fittings where the solenoid screws in.  You can order replacement bowls, but apparently that one is somewhat unique to HWH/Foretravel compared to other Parker Wilkerson parts.  It's P/N PS721P (HWH part number RAP90539). This is a 06L Poly Bowl with 1/8 Connector.

HWH Filters and Bowls
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Need info on what this is

Reply #6 –
I will go back when I'm prepared to work on it, I wasn't today, no tools no light no time. The compressor was running blowing out the hole in the solenoid opening. Does the bowl just screw off? I cut the hot wire to the compressor to get it to stop running till I can check it out
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.

Re: Need info on what this is

Reply #7 –
Hmmm. I have 2000 and OMC just put ona rebuilt air dryer
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: Need info on what this is

Reply #8 –
Good solution. Replace with male/female spas connectors or similar (vs butt connector). Now you have a "switch" for your 12v compressors
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: Need info on what this is

Reply #9 –
It is the bane of my existence.  You can remove the brass fitting at the end, it will reveal a slotted screw fitting.  Remove this and the solenoid will come out.  This leaves the base with 2 wires attached.  Clean the seat and the rubber washer on the part you removed and reassemble.  I also posted some pictures a while back about this issue with the air compressor purge valve solenoid..  I also resolved  this one time by putting an ever so small amount of Marvel mystery oil in the air intake hose.  Over a year so far no harm.

Re: Need info on what this is

Reply #10 –
Found some pics

Re: Need info on what this is

Reply #11 –
Ok I pulled the solenoid took it apart cleaned and lubed it. Went out and touched the wires to the battery to make sure it worked before reinstating it and nothing happened so I assume it is not working. Is hwh  the only place to get one or does fot or mot have one. Anyone know the cost?
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.

Re: Need info on what this is

Reply #12 –
Quote from: hdff –
Ok I pulled the solenoid took it apart cleaned and lubed it. Went out and touched the wires to the battery to make sure it worked before reinstating it and nothing happened so I assume it is not working. Is hwh  the only place to get one or does fot or mot have one. Anyone know the cost?
Common part on Amazon or eBay.  12vdc solenoid valve normally open.
Mark Duckworth
2003 U320 4220
Build 6199, Motorcade 17971

Re: Need info on what this is

Reply #13 –
Tough to find one like the original one pictured.  Anything else will be more complex and bigger.
Maybe Parker/Wilkerson.

Re: Need info on what this is

Reply #14 –
Would it not be normally closed?
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Need info on what this is

Reply #16 –
RAP6354.  A Google search does not turn up any sources for this exact configuration other than HWH (or perhaps MOT or FOT).

Did you check the coil for continuity with a multimeter?  Those potted coils are pretty darn reliable.  Most coil problems are usually caused by bad power supply or wire, faulty ground connection, or corrupted wiring harness.


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: Need info on what this is

Reply #18 –
If the OP is correct, and the coil is truly dead, then rebuilding the valve will not solve the problem.
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: Need info on what this is

Reply #21 –
Ordered one from hwh yesterday. We'll see if it does the trick.
No air dryer on mine that I can see, just the clear bowl
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.