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Topic: Slide Bladder Air won't deflate (Read 475 times) previous topic - next topic

Slide Bladder Air won't deflate

My slide bladder air won't deflate enough to retract the slide.  Aux Pump is working fine, other slides work fine.  I hear air venting from the manifold but it's continuous and I don't get the yellow light.  How do I evacuate the air?  Is there another way to get it deflated?


thanks
Jim
2009 Nimbus CE
2016 Jeep Cherokee Trailhawk
 ̷2̷0̷0̷6̷ ̷C̷o̷u̷n̷t̷r̷y̷ ̷C̷o̷a̷c̷h̷ ̷I̷n̷s̷p̷i̷r̷e̷

Re: Slide Bladder Air won't deflate

Reply #1 –
Jim, sent you a PM
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Slide Bladder Air won't deflate

Reply #2 –
Quote from: Rudy –
Jim, sent you a PM
Tried what you suggested - no luck.  Unable to find vacuum pump.
2009 Nimbus CE
2016 Jeep Cherokee Trailhawk
 ̷2̷0̷0̷6̷ ̷C̷o̷u̷n̷t̷r̷y̷ ̷C̷o̷a̷c̷h̷ ̷I̷n̷s̷p̷i̷r̷e̷

Re: Slide Bladder Air won't deflate

Reply #3 –
Jim, wouldn't that be your 12VDC pump?
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: Slide Bladder Air won't deflate

Reply #4 –
So I'm not familiar with your coach but think the information is correct regardless. So your bladder probably has failed. I installed a vacuum/pressure gage on the slide control bladder air  line. Indicates what is happening. Yes your probably not getting enough vacuum to deflate and set vacuum switch. Your also not getting enough air to seal also.
1 in the normal extend sealed position does the air compressor run continuously?
2 if it does you need to power it down so it doesn't destroy itself.  Its pumping now to a leak. Should have a shut off valve on the bladder controller. Turning valve to close eliminates bladder and leak.
3 if it does power off does it come back on fairly quickly? Yes see step 2, no? good news not leaking, some other problem
4 vacuum pump on your coach is a compleat unknown for me. Mine is a little rectangle  module on the control valve. My HWH controller/computer has a bypass switch inside of it when selected allows retraction without vacuum, but damaging bladder may result. Before using i would recommend reading your supplied HWH operators manual. Very frustrating.
Scott
FYI i ordered a bladder Nov 11th and am hoping for a April delivery, hopefully yours is in stock

Re: Slide Bladder Air won't deflate

Reply #5 –
Quote from: dsd –
So I'm not familiar with your coach but think the information is correct regardless. So your bladder probably has failed. I installed a vacuum/pressure gage on the slide control bladder air  line. Indicates what is happening. Yes your probably not getting enough vacuum to deflate and set vacuum switch. Your also not getting enough air to seal also.
1 in the normal extend sealed position does the air compressor run continuously?
2 if it does you need to power it down so it doesn't destroy itself.  Its pumping now to a leak. Should have a shut off valve on the bladder controller. Turning valve to close eliminates bladder and leak.
3 if it does power off does it come back on fairly quickly? Yes see step 2, no? good news not leaking, some other problem
4 vacuum pump on your coach is a compleat unknown for me. Mine is a little rectangle  module on the control valve. My HWH controller/computer has a bypass switch inside of it when selected allows retraction without vacuum, but damaging bladder may result. Before using i would recommend reading your supplied HWH operators manual. Very frustrating.
Scott
FYI i ordered a bladder Nov 11th and am hoping for a April delivery, hopefully yours is in stock

1. No it does not run continuous
2. Looking for the shut-off valve - is it the same as the air in?
3. Not ver quickly - maybe 3 - 4 x a day.
2009 Nimbus CE
2016 Jeep Cherokee Trailhawk
 ̷2̷0̷0̷6̷ ̷C̷o̷u̷n̷t̷r̷y̷ ̷C̷o̷a̷c̷h̷ ̷I̷n̷s̷p̷i̷r̷e̷

Re: Slide Bladder Air won't deflate

Reply #6 –
Quote from: jimgior13 –
1. No it does not run continuous
2. Looking for the shut-off valve - is it the same as the air in?
3. Not ver quickly - maybe 3 - 4 x a day.

1 Hopefully its not the bladder. Hard to guess with out seeing what's going on . Vacuum pressure gauges lets you know what's happening
2 on the control valve Module but dont worry about it if compressor will shut off,
3. Good

Re: Slide Bladder Air won't deflate

Reply #7 –
The bladder manifold may be defective.  The air moves through it and the moving air causes low pressure with deflates the bladder.  You will hear air existing the bladder manifold even if the bladder is not getting deflated.

The 3 way solenoid valve might be stuck.  Mine did the same thing, HWH replaced it with a rebuilt one for $250.

You can pull the line from the manifold to the bladder and put a vacuum pump on it and use that to deflate the bladder, it doesn't take much.  A vacuum cleaner might work or just suck on it.  If you have compressed air blow air across the end of the tube, it will sick air out.

If you have a 2002 or newer this might not work, your's has a vacuum sensor that turns the light yellow when there is sufficient vacuum. And your bladder manifold probably looks different.

Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Slide Bladder Air won't deflate

Reply #8 –
I've got an older coach like Roger and Scott, but here's a pic of the slide bladder manifold.  You can see the ball valves on the right side (inlet side), and the gauges I've installed to see the status of pressure/vacuum on the output to each bladder in my coach.

Keith
2003 U320 38' #6197