Skip to main content ↑ ↓
Topic: Front HWH air pressure issues (Read 259 times) previous topic - next topic

Front HWH air pressure issues

Until recently, I knew my system had leaks as after about 5 days my air pressure on both front and rear would go down to about 50 lbs. I would start the coach up and bring the air up (the  coach is parked and has not been moved in a couple of weeks) and the front and rear air gauges would cut out about 130. In the last few days I have noticed that the front goes down way quicker than the rear and after about 3 days is at about 50 lbs while the rear gauge is still quite high ( see pics)  I can not hear any evident leaks, but does anyone have ideas at the top of their heads they could share before I dive under  the coach to fully investigate?
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Front HWH air pressure issues

Reply #2 –
Ok but should they not go down at the same time?  Until a week ago it indeed did that
Peter
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Front HWH air pressure issues

Reply #3 –
Quote from: Peter –
I can not hear any evident leaks, but does anyone have ideas at the top of their heads they could share before I dive under  the coach to fully investigate?

The step cover or step cylinders are suspect. Check all the fittings on the front 6 pack.

Mike
Pamela & Mike 97 U 320

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

Re: Front HWH air pressure issues

Reply #4 –
Peter,

You have two separate sections in your air system: front brake system and rear brake system.  That's why you have two separate brake air tanks and two separate dash air gauges.

Besides providing air pressure for braking, the brake tanks also supply pressure to other air operated devices.  You need to study your air system diagram to see what comes off each tank.  Obviously, you have developed a leak in a device that is connected to the front brake tank.  The diagram can give you clues on where the leak might be located.

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: Front HWH air pressure issues

Reply #5 –
Remarkable that on the schematic for my coach there is no indication of hoses going to the step!  Oops...found it!!!
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Front HWH air pressure issues

Reply #6 –
Check the exports of the controllers for the step and floor slide. Mine were leaking.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport