AIR SYSTEM ??

[Don Bradner]

The switch/valves are Clippard MJTV-4, still available from the manufacturer:
http://www.clippard.com/store/display_de...sku=MJTV-4

I've replaced both of mine as they leaked in increasing fashion.

Those small leaks, though, won't cause the problem you are seeing. You have a
significant leak somewhere, probably in the air bag system, or in the brakes.

You have two air gaugues. One is for the tag-axle air bags, and the other is for
the brakes front and rear (two needles). If you shut down, both of those should
hold air for a significant amount of time. If they do, then the problem is
elsewhere.

When I first got mine, the front air bags would significantly drop in less than
15 minutes. I'm not the one who fixed it, but I'm told that the leveler valve
was actually coming apart. Point, though, is that one way or another shutting
down when you have full air should show a symptom somewhere.

Don Bradner
90 PT40 "Blue Thunder"
My location: http://www.bbirdmaps.com/user2.cfm?user=1

On 1/8/2011 at 8:40 PM jamiejbrandt wrote:

>I HAVE A 1990 WB40 AND WHEN I START IT IT TAKES ALONG TIME TO BUILD UP
>AIR ATLEAST I THINK ITS ALONG TIME ITS NEW TO ME AND IM NOT SURE HOW LONG
>IT SHOULD TAKE
>ALSO I HAVE TO PUT IT IN HIGH RPM TO GET IT TO GO UP
>AFTER I GET IT UP TO ABOUT 115 WHEN I BACK OUT OF DRIVEWAY BY THE TIME I
>GET IT TO THE ROAD IT DROPS TO 80 THE ONLY TIME IT STAYS HIGH IS ON THE
>ROAD AT A GOOD SPEED IS THIS NORMAL
>
>ALSO THE HOSES AND THE SWITCH PLATE FOR THE GREY AND BLACK WATER DUMP IS
>LEAKING A BIT NOT THAT BAD DOES ANYONE KNOW WHERE TO GET REPLACMENT PARTS
>
>ALL HELP IS APPRCIATED THANKS
>JAMIE BRANDT
>1990 WB40
>FLORIDA
>