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Topic: 1989 Grandvilla air system and leaks (Read 4275 times) previous topic - next topic

Re: 1989 Grandvilla air system and leaks

Reply #40 –
I have the opposite problem, my typing is slower than my brain... :o

Re: 1989 Grandvilla air system and leaks

Reply #41 –


I am headed back to Conroe to take another stab at the leak..  first up,  try to break the bolts loose
for the Governor, replace it and then see what I can do with the dryer..  someone said there are two filters?

I am assuming one is in the dryer itself..  Try to figure out how it comes apart, remove the filter, clean any crud I see..  measure for bypass pipe ? take parts home.. I would assume freightliner sells whatever I need to bypass the dryer..

Mark

Re: 1989 Grandvilla air system and leaks

Reply #42 –
Mark, you can't just clean the dryer filter. You must replace it, there is a service kit you can get at NAPA auto parts for it.
  Richard B

Re: 1989 Grandvilla air system and leaks

Reply #43 –
Quote from: Mark of Houston –
Try to figure out how it comes apart, remove the filter...

Working on the air dryer can be simple, or complicated.  I suggest the following steps.  First, determine what model dryer is installed on your coach.  Take a good look at it - get a couple photos of it, if possible.  It might have a identifying decal of some kind, if you are lucky.  If not, post the photos here, and someone on the Forum might be able to tell you what model it is.  If that doesn't work, you can remove it from the coach and take it to the local NAPA store.  They will probably have a filter kit for it (good solution) or they might have a complete remanufactured unit in stock (IMO, the best solution, considering the age of your coach).  Also, depending on the model of your dryer, you might have the opportunity to "upgrade" to a newer, more efficient design.  Good luck!

Re: 1989 Grandvilla air system and leaks

Reply #44 –
When I have mine parked at the house for a long time, if not in the level mode, it eventually starts to sag low on the rear. I hook up a little pancake compressor to the auxiliary air hose, turn the ignition key on, open the auxiliary air line valve and fill it to 120psi or so. That brings it up although it takes awhile. I guess the  onboard 110v compressor could fill the air bags from zero but it would take a really long time. The auxiliary air hose and valve can likely be accessed through the little compartment door behind the entry door.
jor

Re: 1989 Grandvilla air system and leaks

Reply #45 –
My 1990 U280 with 110v compressor in the storage bay will air up the coach to 110lbs in about 5 minutes.  All that is necessary is to turn on 12V master switch and the 3rd switch located next to the steps.  The key does not have to be on.

Re: 1989 Grandvilla air system and leaks

Reply #46 –
Ok...  I should have thought of you tube before.. I'm trying to familiarize myself with the dryer...
Here are two pretty good short videos on the Dryer and one on the Governor.

Sheesh..  the dryer is huge.. I will call NAPA to see what the replacement cost is...

http://www.youtube.com/watch?v=EAZJuaX1xNM

http://www.youtube.com/watch?v=FHGcXvDmZ5E

Re: 1989 Grandvilla air system and leaks

Reply #47 –
Quote from: Kemahjohn –
My 1990 U280 with 110v compressor in the storage bay will air up the coach to 110lbs in about 5 minutes.  All that is necessary is to turn on 12V master switch and the 3rd switch located next to the steps.  The key does not have to be on.

Thanks John,  there are some switches next to the steps..  I didn't know what they are for..

Re: 1989 Grandvilla air system and leaks

Reply #48 –
Quote from: Mark of Houston –
Sheesh..  the dryer is huge.. I will call NAPA to see what the replacement cost is...

There should be a core charge involved - you pay one price when you get the replacement, you get $ back when you return the old one.  Remanufactured (as long as it's factory-done) will be cheaper and just as good as new.  Just so you don't end up needing a fitting, it's usually easier to pay the larger amount then go back with the old unit after you do the replacement to get your core charge back.  Our NAPA didn't care if that took several days/weeks; but did ask that we use the same box to return the old one if possible.

Re: 1989 Grandvilla air system and leaks

Reply #49 –
Master switch = Salesman switch?

My 1999 U320 has 3 switches near the steps. None for air.

Is there a manual switch in a U320 somewhere?

best, paul

Re: 1989 Grandvilla air system and leaks

Reply #50 –
My U320 has a 12V compressor and I can't get it to work.

Re: 1989 Grandvilla air system and leaks

Reply #51 –
I called NAPA

For the dryer they quoted me 200. for a remanufactured one and 379. for a new one ...

I'm not real sure he gave me prices for the correct dryer.  The brand name was Haldex 

At any rate, they don't stock them and would have to order it

Also stated he sells a cartridge for it ... ?

Re: 1989 Grandvilla air system and leaks

Reply #52 –
there is a desiccant in the dryer (cartridge) at this point you should go with new or reman - the prices sound a bit high, but others will chime in - can you post a picture of the dryer on your coach?

Re: 1989 Grandvilla air system and leaks

Reply #53 –
Quote from: Tim Fiedler –
there is a desiccant in the dryer (cartridge) at this point you should go with new or reman - the prices sound a bit high, but others will chime in - can you post a picture of the dryer on your coach?

I cant post a picture.. The coach is 54 miles from me, 

Your thinking the prices sound high?    Good..    I was afraid they were going to be higher...

Re: 1989 Grandvilla air system and leaks

Reply #54 –
Factory (i.e. the factory that built it, not Chinese knock-off or reman by Bubba) is just fine.

And if Bendix AD-2, an AD-9 is a direct replacement in terms of how it is hooked up.

Re: 1989 Grandvilla air system and leaks

Reply #55 –
Quote from: wolfe10 –
Factory (i.e. the factory that built it, not Chinese knock-off or reman by Bubba) is just fine.

And if Bendix AD-2, an AD-9 is a direct replacement in terms of how it is hooked up.

Thanks Wolfe,

so you think mine is a AD-2 ?  and an AD-9 will work too ?  These should be the same as whats on mine? 

Re: 1989 Grandvilla air system and leaks

Reply #56 –
Mark I just replaced my AD-4 this spring and bought a new AD-9 from my local Peterbuilt store and it fit with no problems and works great. one note If your dryer is not purging check the back side of the compressor , when I had trouble with mine there was a plug missing. I did not fined it until I bought the new dryer, put the plug in and bingo everything worked. Just a thought.

Re: 1989 Grandvilla air system and leaks

Reply #58 –


Freightliner wants 542.00 for an AD-9  ..  this is a new part and they don't offer reman's

I found it online for a lot cheaper.. for way under 200. 

I'm gonna hold off on the dryer for now..  just going to bypass it..

Re: 1989 Grandvilla air system and leaks

Reply #59 –
When you remove the air dryer you will be surprised at how much water accumulates in the wet tank.  Be sure to drain it frequently. Water and air brakes do not mix.
Gary B