Wanderlodge Gurus - The Member Funded Wanderlodge Forum

Progress since last post regarding air system issues.

Air pressure was bleeding off at the rate of 60 pounds in 5 minutes
(120 to 60). When I bought the coach 3-1/2 years ago it was leaking 60
pounds in 20 minutes. I monitor this by the holding tank dump station
pressure gauge. Also, the drive/tag suspension would go down in 24
hours. My son has great hearing. He found a couple more air leaks,
namely two of the three Pilot Control Valves on the drive and tag
axles. The curb side drive and the tag were leaking. All three valves
were replaced. Several more leaks were found and resolved by
tightening up line fittings. The leaking was now 40 pounds in 17
minutes, much better, but not to the point I was happy. And the
drive/tag would still go down in 24 hours.

Next was to determine which part of the system is leaking. Blocking
off the dump valves and airing up the suspension, the suspension would
still go down in 24 hours. So it's either the air springs or the hard
lines. The air springs were new three years ago. Decided to replace
the hard lines to the bags with plastic lines. The result is the
suspension stands for days, and the air leak(s) is now at 50 pounds in
5 hours.

I'll stop working this project for now. May need to revisit over time
as I'm sure more hard lines will rub together creating more leaks. A
pit sure would be nice.. .I would change out the hard lines for the
plastic.

Curt: I found a leak on the Pressure Protection Valve

http://www.ryderfleetproducts.com/cgi-
bin/ryderfp/products/srm/oid/48389/erm/product_detail.jsp

on top of my wet tank...Bill Pape told me to check the 4 cap screws
on the valve and shure enough after tightening the 4 bolts the
leakdown rate is greatly reduced. My air throttle still works
immediately after 24 hrs but chasing leaks is still an ongoing ordeal.

Dick Gideon
1989 35FC
Rolla, MO

--- In WanderlodgeForum@yahoogroups.com, "Curt Sprenger"
wrote:
>
> Progress since last post regarding air system issues.
>
> Air pressure was bleeding off at the rate of 60 pounds in 5 minutes
> (120 to 60). When I bought the coach 3-1/2 years ago it was leaking
60
> pounds in 20 minutes. I monitor this by the holding tank dump
station
> pressure gauge. Also, the drive/tag suspension would go down in 24
> hours. My son has great hearing. He found a couple more air leaks,
> namely two of the three Pilot Control Valves on the drive and tag
> axles. The curb side drive and the tag were leaking. All three
valves
> were replaced. Several more leaks were found and resolved by
> tightening up line fittings. The leaking was now 40 pounds in 17
> minutes, much better, but not to the point I was happy. And the
> drive/tag would still go down in 24 hours.
>
> Next was to determine which part of the system is leaking. Blocking
> off the dump valves and airing up the suspension, the suspension
would
> still go down in 24 hours. So it's either the air springs or the
hard
> lines. The air springs were new three years ago. Decided to replace
> the hard lines to the bags with plastic lines. The result is the
> suspension stands for days, and the air leak(s) is now at 50 pounds
in
> 5 hours.
>
> I'll stop working this project for now. May need to revisit over
time
> as I'm sure more hard lines will rub together creating more leaks. A
> pit sure would be nice.. .I would change out the hard lines for the
> plastic.
>

Dick,

Thanks. On the PT's (ours anyway) there are a couple PPVs and the one mounted between two manifolds was replaced along with the one for the tag axle. But, in the end, that was not the only air issue. With out writing a book, it's sometimes difficult to explain what was done to resolve these air issues. I hope my previous post helps to clarify.

Our coach also has an air leak at the air throttle. It goes away and the cruise control does the same after the air system is up to about 50% and then the air leak remains at a soapy bubble or two every 15 seconds. I'm happy with that for now. Dont' want to push my luck here as these old systems continue working.

On Sun, Sep 28, 2008 at 3:45 PM, Richard Gideon <"giderich@fidnet.com"> wrote:

Curt: I found a leak on the Pressure Protection Valve

http://www.ryderfleetproducts.com/cgi-

bin/ryderfp/products/srm/oid/48389/erm/product_detail.jsp

on top of my wet tank...Bill Pape told me to check the 4 cap screws

on the valve and shure enough after tightening the 4 bolts the

leakdown rate is greatly reduced. My air throttle still works

immediately after 24 hrs but chasing leaks is still an ongoing ordeal.

Dick Gideon

1989 35FC

Rolla, MO

--- In "WanderlodgeForum%40yahoogroups.com", "Curt Sprenger"

wrote:

>

> Progress since last post regarding air system issues.

>

> Air pressure was bleeding off at the rate of 60 pounds in 5 minutes

> (120 to 60). When I bought the coach 3-1/2 years ago it was leaking

60

> pounds in 20 minutes. I monitor this by the holding tank dump

station

> pressure gauge. Also, the drive/tag suspension would go down in 24

> hours. My son has great hearing. He found a couple more air leaks,

> namely two of the three Pilot Control Valves on the drive and tag

> axles. The curb side drive and the tag were leaking. All three

valves

> were replaced. Several more leaks were found and resolved by

> tightening up line fittings. The leaking was now 40 pounds in 17

> minutes, much better, but not to the point I was happy. And the

> drive/tag would still go down in 24 hours.

>

> Next was to determine which part of the system is leaking. Blocking

> off the dump valves and airing up the suspension, the suspension

would

> still go down in 24 hours. So it's either the air springs or the

hard

> lines. The air springs were new three years ago. Decided to replace

> the hard lines to the bags with plastic lines. The result is the

> suspension stands for days, and the air leak(s) is now at 50 pounds

in

> 5 hours.

>

> I'll stop working this project for now. May need to revisit over

time

> as I'm sure more hard lines will rub together creating more leaks. A

> pit sure would be nice.. .I would change out the hard lines for the

> plastic.

>

--
Curt Sprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, CA