1989 Grandvilla air system and leaks

Topic: 1989 Grandvilla air system and leaks (Read 3362 times) previous topic - next topic

Re: 1989 Grandvilla air system and leaks

Reply #50 – May 05, 2015, 01:54:04 pm

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

Re: 1989 Grandvilla air system and leaks

Reply #51 – May 05, 2015, 02:02:03 pm

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 – May 05, 2015, 02:12:40 pm

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 – May 05, 2015, 02:18:36 pm

Quote from: Tim Fiedler – May 05, 2015, 02:12:40 pm

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 – May 05, 2015, 02:55:10 pm

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 – May 05, 2015, 07:26:23 pm

Quote from: wolfe10 – May 05, 2015, 02:55:10 pm

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 – May 05, 2015, 08:33:41 pm

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 #57 – May 06, 2015, 12:01:56 am

Quote from: Andy 2 – May 05, 2015, 08:33:41 pm

Mark I just replaced my AD-4 put the plug in and bingo everything worked. Just a thought.

Thanks Andy

Re: 1989 Grandvilla air system and leaks

Reply #58 – May 06, 2015, 12:06:02 am

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 – May 06, 2015, 08:28:14 am

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

Re: 1989 Grandvilla air system and leaks

Reply #60 – May 06, 2015, 08:40:35 am

Gary, from my sperience, if your getting moisture/water in the wet tank when you have a air dryer, you waited too long before servicing it or it is very defective. If that is the case, driving in freezing weather you most likely will have bad issues with brakes from the freezing.

Re: 1989 Grandvilla air system and leaks

Reply #61 – May 06, 2015, 09:23:30 am

@Dave M,

Question. (I'm asking for Mark's benefit, and also for anyone else who has ever found water in one or more air tanks) Gary's old coach has sat unused for some time. Could the water in his tanks be simply caused by long-term condensation? If he installs a new or rebuild dryer, and gets his coach running, then the "new" air going into the tanks should be dry. Can the existing water (moisture) in the tanks then be gradually removed by frequent tank draining? I would think (hope), that as you continually push dry air into the tanks, and remove water from the low points in the plumbing (drains), that you would eventually dry out the system.

Re: 1989 Grandvilla air system and leaks

Reply #62 – May 06, 2015, 09:31:23 am

All three air tanks have drains. That is what they are there for, to drain water. The wet tank is called the wet tank for a reason. The tank drains should be exercised every time you run the coach to drain any accumulated moisture.

Re: 1989 Grandvilla air system and leaks

Reply #63 – May 06, 2015, 11:01:55 am

Dave, My experience was that the dryer was removed and bypassed so I could get it home. When I drained the tanks there was a tremendous amount of water just from a days drive. It accumulates fast and as you say cold weather, water and air brakes do not mix.
Gary B

Re: 1989 Grandvilla air system and leaks

Reply #64 – May 06, 2015, 11:23:01 am

Quote from: cajk – May 06, 2015, 09:23:30 am

@Dave M,
Could the water in his tanks be simply caused by long-term condensation?

No, as new moisture laden air would have to be constantly introduced into the tank.

We didn't have air dryers and in a coastal city, we got a significant amount of water each morning when checking the tanks. Even a desert climate will have moisture in the air that will condense in the tanks.

Pierce

Re: 1989 Grandvilla air system and leaks

Reply #65 – May 06, 2015, 12:38:48 pm

Mark,

Here is a link to everything you could ever want to know about your air dryer.

Air Dryers/Air Line - Haldex

Keith

Re: 1989 Grandvilla air system and leaks

Reply #66 – May 06, 2015, 12:49:06 pm

OK, now here is something I do not have on our ORED, but am still interested.
I do not know what the air dryer or an AD-9 even looks like. What I do know is what a desiccant does--it removes moisture from the air.
When my company built and crated 50 drilling machines for the U.S. Government, part of the Level A crating specifications required using a desiccant before closing up the crate. When the "Guvmint" inspector saw the open barrel containing the desiccant packages he told me he would fail every on of our machines. I asked why. His reply was that the d-pkgs were sitting open and soaking up moisture. If we would bake them in an oven at 250 degrees for four hours to remove the moisture he would then certify the machines for payment.
Could it be possible to do the same baking for the air dryers used on your coaches? It does mandate having a spare.

Re: 1989 Grandvilla air system and leaks

Reply #67 – May 06, 2015, 02:11:45 pm

Hi, I have been lurking here for a while. Purchased our 1990 u300 about 6 months ago.
I found the two "dry" tanks up front and see what I guess is the "wet" tank near the rear end. I see a line coming off the bottom of that tank but don't see where it goes.
Does anybody know where this drain should be on my coach?

Re: 1989 Grandvilla air system and leaks

Reply #68 – May 06, 2015, 04:33:58 pm

Air Dryer Bypass Demo

Thanks to cajk's link on the bypass demo, on page one of this thread, which led to further links.. Emergency Air Dryer Bypass

Thanks also to BeamAlarm !!

I was able to purchase today exactly the parts I needed
for the bypass... had to go to a hydraulics
hose and fittings company to make the purchase. ... so still putting things together today for the governor Remove and replace, and the dryer bypass.. I ve decided to also do a
a filter and motor oil change on site..
I have the oil and the filter.. so why not.. I just feel the oil is still too darn thin...

Main objective of coarse is getting the coach to air up...planning on driving up now Tomorrow..

Still have some tools to dig up

Mark

PS.. I also purchased a "90 degree" 3/4" male flare to 3/4" male flare.. "one piece" .. I think this will work fine.
I purchased the 3 pieces to make the U shaped bypass too, but the one piece 90 will most likely prove to be all that's needed, eliminating the problem to bend or reroute the hoses straight.

Re: 1989 Grandvilla air system and leaks

Reply #69 – May 06, 2015, 05:02:42 pm

Mark, if you feel that the oil is too thin, why not take a sample and send it to Blackstone labs or any other oil sampling company. You might have a fuel issue that is contaminating the oil. Sure wouldn't hurt.

Re: 1989 Grandvilla air system and leaks

Reply #70 – May 06, 2015, 05:45:38 pm

1990 U300 wet tank drain.
Not sure about yours, but my 1990 U280 wet tank drain is piped out to the passenger side just in front of the rear wheel. There is a spring loaded valve there with a wire ring in the center post. Push the center post upward or to the side to bleed the tank.

Re: 1989 Grandvilla air system and leaks

Reply #71 – May 06, 2015, 06:02:17 pm

Nitehawk.....my '89 ORED has an air dryer yours should too unless you have a hydraulic system. Mine is at the drivers side rear

Re: 1989 Grandvilla air system and leaks

Reply #72 – May 06, 2015, 06:28:55 pm

I don't think I have one. My brake pedal/cylinder under the floor, has an electric motor boost. Only thing in the driver's side access panel to the engine is a small radiator mounted horizontally and has an electric fan on it. I think it is for the transmission.

Our coach is the basic, no fancy frills, just a super reliable old Foretravel that is like an old Timex watch. It takes a licking but keeps on ticking.

Re: 1989 Grandvilla air system and leaks

Reply #73 – May 06, 2015, 07:00:10 pm

Nighthawks sounds like Hydraulic brakes with spring /leaf suspension I think. The motor on hyd brake cylinder is for emergency braking if hydr pressure drops and is not holding. I had that setup on the 93 225 ORED.
JohnH

Re: 1989 Grandvilla air system and leaks

Reply #74 – May 06, 2015, 10:28:23 pm

Interesting John & Nitehawk....I figured all the ORED's were the same. Mine has air brakes and on the 4 air bag suspension system. I 'm always learning something new on this forum. Love it!

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