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Topic: Passenger front air bag leaking somewhere  (Read 587 times) previous topic - next topic

Passenger front air bag leaking somewhere

So does anyone know were the front passenger air bag line routes to?
I'm finding the bag is losing air over a few hours.

Thanks
Now 1999 U320 36' with ISM/M11
600 amps hours of lithium ion batteries.
Jeep gladiator tow vehicle for exploring.

Re: Passenger front air bag leaking somewhere

Reply #1 –
Front six-pack manifold.  A likely culprit could be the o-rings on the six-pack or the seat of one of the solenoid valves.  Have you rebuilt it at all?

Replica HWH Plungers Redux
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: Passenger front air bag leaking somewhere

Reply #2 –
No I haven't.
I find that as the front bag goes down then the front rear one follows but slower.
Now 1999 U320 36' with ISM/M11
600 amps hours of lithium ion batteries.
Jeep gladiator tow vehicle for exploring.

Re: Passenger front air bag leaking somewhere

Reply #3 –
Quote from: Ahb867 –
No I haven't.
I find that as the front bag goes down then the front rear one follows but slower.
You almost certainly have two independent leaks  then. I would spray each airbag with bubble solution (while inflated) and if no apparent leaks, rebuild each six pack before going down any other rabbit hole too deep.
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: Passenger front air bag leaking somewhere

Reply #4 –
We have also had one member that had a bad air bag that had a fairly bad leak and he was not able to see it when he sprayed the bag with bubbles
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Passenger front air bag leaking somewhere

Reply #5 –
Quote from: Ahb867 –
No I haven't.
I find that as the front bag goes down then the front rear one follows but slower.

Is the aux compressor coming on to relevel the coach?
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: Passenger front air bag leaking somewhere

Reply #6 –
I would carefully check the air line fittings at the air bags.  Mine has push connect fittings and although I usually find them to be quite reliable, they can be prone to leaking if you disturb the air line going into the fitting.  I believe that each pair of airbags at each corner of the coach will always "see" the same air pressure because they are connected to a common air manifold within the six pack and share a single fill solenoid.  It's possible that the two airbags are not carrying the same weight and that is why one appears to lose air first as you say and ..."the other one follows but slower".  Each airline is continuous from it's airbag to the six pack manifold and the air line tubing is very durable so your leak is likely to be the airbag, the air fitting or the six pack manifold.
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI

Re: Passenger front air bag leaking somewhere

Reply #7 –
I would swap the front dump solenoids to see if the problem follows the right solenoid to the other side.
John Duld
1995 U320C SE 40'

Re: Passenger front air bag leaking somewhere

Reply #8 –
I have ordered a new complete six pack for the front from Foretravel. Hopefully that will take care of it.
Now 1999 U320 36' with ISM/M11
600 amps hours of lithium ion batteries.
Jeep gladiator tow vehicle for exploring.

Re: Passenger front air bag leaking somewhere

Reply #9 –
If you don't want your old one,will gladly take it,PM me.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Passenger front air bag leaking somewhere

Reply #10 –
The air leak started when I replace the front passenger rear air bag. So yesterday I installed a new complete front 6 pack and tested with soap for Air leaks. This morning the bags were flat on the front passenger side. Both of them!
Any ideas?
Now 1999 U320 36' with ISM/M11
600 amps hours of lithium ion batteries.
Jeep gladiator tow vehicle for exploring.

Re: Passenger front air bag leaking somewhere

Reply #11 –
Quote from: Ahb867 –
The air leak started when I replace the front passenger rear air bag. So yesterday I installed a new complete front 6 pack and tested with soap for Air leaks. This morning the bags were flat on the front passenger side. Both of them!
Any ideas?

I would start by looking real hard at the new bag that you replaced or take it out of the equation altogether by capping off the airline and see what happens over time.
Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: Passenger front air bag leaking somewhere

Reply #12 –
Quote from: Ahb867 –
The air leak started when I replace the front passenger rear air bag. So yesterday I installed a new complete front 6 pack and tested with soap for Air leaks. This morning the bags were flat on the front passenger side. Both of them!
Any ideas?
They are one circuit so if one leaks they both leak. What kind of fittings did you use to attach the lines to the bags? And were they new?

I agree with Dough, check for leaks on the new bags as well. I had two new good years arrive with internal failures. Put the coach in high-idle and air your tanks up all the way. Then put the coach in raise mode and inflate the bags to their highest height. Then go spray your bubble solution. Internal leaks will manifest between the rubber bag and the plastic cone they sit on and can be hidden by the bag as it rolls down onto the cone.
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: Passenger front air bag leaking somewhere

Reply #13 –
Quote from: Ahb867 –
The air leak started when I replace the front passenger rear air bag. So yesterday I installed a new complete front 6 pack and tested with soap for Air leaks. This morning the bags were flat on the front passenger side. Both of them!
Any ideas?

Are you talking about passenger side the front axle air bags, the rear axle air bags, or both. 
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Passenger front air bag leaking somewhere

Reply #14 –
Both of them.
Now 1999 U320 36' with ISM/M11
600 amps hours of lithium ion batteries.
Jeep gladiator tow vehicle for exploring.

Re: Passenger front air bag leaking somewhere

Reply #15 –
After leveling I turn off the system so the auxiliary compressor doesn't come on.
Now 1999 U320 36' with ISM/M11
600 amps hours of lithium ion batteries.
Jeep gladiator tow vehicle for exploring.
 

Re: Passenger front air bag leaking somewhere

Reply #16 –
Quote from: Ahb867 –
After leveling I turn off the system so the auxiliary compressor doesn't come on.

With a leak, as long as it's not causing the aux compressor to run continuously, you are better off allowing it to run and relevel the coach periodically/as needed.  Not doing so can cause the chassis to twist and may cost you a windshield.

It sounds like you need to take soap bubbles to the fittings of the air bags and the other end of the lines at the manifolds.  If it's a large leak, it might be so fast that it doesn't let the bubbles form before it blows them apart.  You might be able to feel it with a finger on the fitting.
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