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Topic: Auxciliary compressor won't run (Read 1786 times) previous topic - next topic

Re: Auxciliary compressor won't run

Reply #25 –
Mike, look at the air system drawing.  The engine driven compressor pushd air through the air dryer into the "wet" tank.  I think it might help to trap water but if you open the wet tank drain valve you hope to never see any water or white power (from the dryer)
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Auxciliary compressor won't run

Reply #26 –
"Air dryers are a lazy man's way of not bleeding the tanks daily."

And without the dryer there's no chance of having desiccant powder get loose.

Re: Auxciliary compressor won't run

Reply #28 –
I do open the drain valve frequently, I have never seen any water.  If the air dryer fails then you get powder.  Just using the tools provided.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Auxciliary compressor won't run

Reply #29 –
 Ah so good news and bad news.... While trying to raise the coach to insert jacks to keep it up.... my rear end did not raise with the front. So either don't know how to raise it up or something is broken. On the good side, the aux compressor came on while trying to do that, which was a "HOORAY for me!" So the pressure switch and the solenoid is working fine. But just not sure why its not keeping the coach right side uup when parked, or now while the rear won't go up all the way to insert the stands... fun fun fun....
'99 U320 40 WTFE
Build #5462,
1500 Watts Solar 600 amp Victron lithium
2012 Jeep Grand Cherokee Overland Hemi
Instagram bobfnbw
Retired

Re: Auxciliary compressor won't run

Reply #30 –
if you are relying on the 12v compressor it will be real slow... run the motor and hit the travel button on the pad..

if sitting the light should be low and blinking in the "keep it level"mode

Re: Auxciliary compressor won't run

Reply #31 –
Quote from: bobfnbw –
While trying to raise the coach to insert jacks to keep it up.... my rear end did not raise with the front. So either don't know how to raise it up or something is broken.

Bob,

Even with the air regulator on the front air bags the rear is still about 8X slower than the front to raise, especially the last inch or so.  Your regulator under the front may be set to high causing the front to rise too quick. The regulator is there to try to make up for the difference in the weight of the engine/trans. that the rear is lifting.

Pamela & Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Auxciliary compressor won't run

Reply #32 –
Bob,
I hold the Raise button on until the rear pressure gauge is rising significantly( at least 10psi) then turn off the ignition switch to maintain the Raise position.  I then can fit my jack stands in the rear.
Regards,
Brett

'99 42' Foretravel Xtreme
'14 Brown Motorsports Stacker
'05 Chevy SSR
'02 BMW R1150R

Re: Auxciliary compressor won't run

Reply #33 –
The replacement Thomas compressor for our '02 320

Diagram
http://www.hwhcorp.com/mr055400.pdf
'02 40' U320t  4010WTFS Build 6036 1 slide
Motorcade # 17841
SKP 151920
Retired truck driver
 5 million miler
Still have itchy feet for travel

Re: Auxciliary compressor won't run

Reply #34 –
I'll try that again, but think I have a leak back there keeping it from fully inflating. After 2 days, the passenger side air bag on the rear was fully deflated. These were new 3 years ago.  afraid to go under the coach there now without the stands in place. Did go under the front and the clearance is millimeters between my forehead and the big metal parts that will crush it. That was on a low creeper board.
Working till Monday so will try then. Till then will have to start the engine to fill it back up. The 12 volt compressor is not filling the back tank it seems although don't know for sure. The air tubing off the 12 volt is going forward to the front of the coach.
Bob
'99 U320 40 WTFE
Build #5462,
1500 Watts Solar 600 amp Victron lithium
2012 Jeep Grand Cherokee Overland Hemi
Instagram bobfnbw
Retired

Re: Auxciliary compressor won't run

Reply #35 –
Bob, am not able read all history, so apologize in advance....but what back tank is aux not filling?  I am not thinking of one that it can or is supposed to fill.  Maybe i not understand....
Mike
2001 U320 4010 Build 5878 (Gus)
Wrangle Unlimited Toad
Nacogdoches

Re: Auxciliary compressor won't run

Reply #36 –
Bob,

The leak could be at one of the bags, but at least as likely is at the rear "6 pack".  Take some soapy water and go over the bags, all the connections and the rear 6 pack.  Access to the rear 6 pack is from the driver's side-- should be able to see (but not reach it) by opening the bay door behind the left rear wheel.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Auxciliary compressor won't run

Reply #37 –
On my 94 coach it takes more air pressure to raise the rear than the front. I always use engine provided air to raise the coach when I am putting it up on the safety stands. I think the front needs 45lbs and the rear needs 75lbs. That is why it takes significantly longer to raise the rear than the front.  ^.^d
The selected media item is not currently available.
Gerry & Brenda
CHARLOTTE HARBOR, FL
1994 Grand Villa - # 4466
U300 Unihome - 6V92 Detroit
4 speed Allison - Jake Brake

Re: Auxciliary compressor won't run

Reply #38 –
Quote from: wolfe10 –
Bob,

The leak could be at one of the bags, but at least as likely is at the rear "6 pack".  Take some soapy water and go over the bags, all the connections and the rear 6 pack.  Access to the rear 6 pack is from the driver's side-- should be able to see (but not reach it) by opening the bay door behind the left rear wheel.
Planning on doing that soon Brett. Coach is up against a fence on that side right now.

Quote
Bob, am not able read all history, so apologize in advance....but what back tank is aux not filling?  I am not thinking of one that it can or is supposed to fill.  Maybe i not understand....

Mike what I mean is the aux compressor doesn't seem to be filling the rear bags. But as others said it takes more time. But with a good sized leak it might never fill....
'99 U320 40 WTFE
Build #5462,
1500 Watts Solar 600 amp Victron lithium
2012 Jeep Grand Cherokee Overland Hemi
Instagram bobfnbw
Retired

Re: Auxciliary compressor won't run

Reply #39 –
UPDATE: Installed new aux compressor, no change. Took moho to Temecula Valley RV had wiring checked, no power to pressure valve switch, fixed, slideout aligned and now it works like new. The driver's air seat had a leak at its manifold and caused the compressor to run continually while at storage until it gave up and died.
New manifold ordered from dealer to be installed later this month. Had brass ball valve installed inline and stopped the leaking. All is good.
Jon Ohman
2001 U320 36'
Build #5809

Re: Auxciliary compressor won't run

Reply #40 –
That's job security,I'm sure all those drivers check their tires and fluids every stop.
96 U270 BUILD 4810
85 380SL
Drummonds TN.