Good Morning,
03 U320 ISM11 - This coach is new to me and am going through all of the suggested maintenance.
The Haldex was installed within the last 3 years and I noticed it appears to be leaking some oil around the base of the cartridge housing. It's not dripping and appears the oil is made its way down to the lower half of the unit.
Did some searching and read the manual but didn't come up with much. Is this likely a maintenance fix ? New cartridge and O-ring ?
That's from the engine and tires. FWIW the air dryer is supposed to leak oil: Every time the D2 governor decides that the air tank is full, the air dryer purges the coalescing filter of accumulated water and oil.
Congratulations! If this is what concerns you, you're in a good place and asking great questions.
You are also posting great pictures that enhance your question.
Congrats on your purchase and welcome to the Foretravel family.
Richard
CharlieB,
If the dryer has been changed out as you stated we need to see if that is the correct dryer for the compressor you have. That dryer is a Purest Air and your coach may have came with the Pure Air Plus. Somewhere along that time frame of your coach build they had a compressor/dryer change. If you have the wrong dryer it can cause the compressor to pump oil when there is nothing wrong with the compressor. So see if you can post a pic of the compressor name plate so one of us can do some hunting.
Mike.
So according to my build sheet the original Haldex was model N4250. I cannot locate the engine air compressor in the build sheet. Might be staring right at me. I will have to look tomorrow when I head up to the coach.
The engine compressor might be associated with the ESN (engine serial number), which you'd find via Cummins QuickServe.
Google says a Haldex N4250 is a Pure Air Plus (which is what we had on our 2003, build number 6106, about 50 before yours). Rebuilt replacement is DA33100X.
That said, several parts places indicate DA34100 Purest is a replacement/upgrade for a DA33100 Pure Air Plus. Mike would know better if anything else needed to be changed out.
BTW, a quick forum search turned up this:
Air dryer pressure valve blew, looking for advice. (https://www.foreforums.com/index.php?topic=36658.0)
Need to Replace Air Dryer (https://www.foreforums.com/index.php?topic=18308.msg125497#msg125497)
I just got back on after taking care of deacon duties but Michelle is on the right track. I will have to do some studding about the swap over as to what needs to be done. I think that the info off the compressor will be the determining factor. Either the compressor tag or Quick serve will be the thing I would trust as to which compressor you have. It could be a SS296 or a QE series The compressor is hid up under and behind the fuel pump but not to the back of the starter. Here is a link to an old thread that we were discussing different compressor/dryer combinations. This thread gives a better explanation that I can give typing on the different compressors. Holset type e compressor (https://www.foreforums.com/index.php?topic=43532.msg438474#msg438474) This is one place as good as OEM might not be the best option.
Mike
So I looked at the build sheet again and see the auto air compressor (seldec) but nothing jumps out as the brake air compressor.
You can see it has a newer d2 and on the very top of the compressor it has a Wabco output to the dryer.
There are some raised numbers on the engine side of the pump but I can't get my inspection camera in there to view them. There is a tag on the fuel pump and not sure if that tells me anything.
See my pics
If you look at the first pic. it appears that someone (Cummins or Foretravel) has covered the info sticker with tape to keep the sticker from being painted. You should be able to remove the tape and expose a blue sticker with the compressor info.
Mike
Are you talking about the area just to the left of the far left hose from the d2 ? I will check it again. Is that where the tag should be ?
1. yes
2. good as that looks like they mask the tag off for protection
3. yes you are looking for a sticker
4. An FYI that 4 wire plug you see in that same pic. just beyond where we are looking for the info tag is the cam sensor plug.
Mike
Ok here it is. Wabco 4059825 or 4069825 single cylinder compressor.
Both of these are replaced with wabco part number 9111535200.
With the info I have that compressor is compatible with the Purest air dryer. To be sure a have ask a Cummins field rep and it may take a day or 2 to get back to me. So back to where is the oil coming from, which I would guess the giant "O" ring on the decant filter is seeping. I know hunting down that info on the compressor is a pain in the dariaire, but you don't want to be pumping oil into the dryer other than what is in the vapor which the dryer can handle.
Mike
So I am gonna clean all of oily film off the dryer and get the compressor to cycle a few times while it's parked.
If I have oil on it after that I will get the rebuild kit and do it all over again.
Keep in mind this dryer is less than 4 years old with about 10k miles on it.
The drain /purge port will always have some oil on it .
Some install guides state to run the pressure line up hill and even loop it to reduce the oil in the dryer .
Charlie,
I just got off the phone with Mark (took him longer to get back to me than I thought) and he said that the QE series and the SS compressors are the ones that you have to be selective with the dryer you use. So you your Purest air dryer should work properly with the compressor you have.
Mike
Someone on this Forum gave me the advice to change the desiccant cartridge every two years. Given the accumulated road grime and the unknown provenance of my air dryer I chose to use a "factory" re-manufactured unit.
Update - cleaned off dryer and surrounding areas. There was definitely motor oil coming out of the dryer. Enough to create a drip on a nearby hose at the same level the dryer canister meets the base.
The oil I'm referring to is NOT coming out of the exhaust port its coming out where the canister meets the base.
I'm going to replace the DA34100 with a factory reman. $415 on finditparts.com. cheapest I could find. These remans are hard to find right now.
First I want to check the tanks for white powder, oil, and water. With engine off do I simply and slowly open the drain valves on the front and rear tanks ? My wet tank doesn't have a drain valve on the bottom.
Once I get the new dryer installed I plan to inspect the old one to see if I can figure out whether or not I have a compressor related issue.
Yes, just open the drain valves and see what comes out. Clean dry air-- all is well.
Are you absolutely sure of this? Perhaps it is not on the bottom of tank, but located remotely? The wet tank is the first tank in the system downstream of the dryer. It is the first tank to catch any water or oil that gets past the dryer. That's why it is called "The Wet Tank". It would be
very unusual if there was not some way provided to drain that tank. Have you looked around the edges of the rear wheel wells for a
remote drain valve? Most older Foretravel coaches located the remote wet tank drain valve just in
front of the driver side outer rear wheel, and just inside the wheel well cover. Take another look around that area, just to be sure...
See the air system diagrams (found in our excellent Forum library) linked below. Should be similar to your coach.
https://www.foreforums.com/index.php?action=media;sa=item;in=1055#viewitem
https://www.foreforums.com/index.php?action=media;sa=media;in=3301
On my 2003 U320 there's 3 drain valves just in front of the drivers side front tire on the frame and one drain valve in front of the drive tires on the drivers side also.
Ok I know most of you have been sitting on the edge of your seats waiting for an update ;)
As I learned today there are 4 remote dump valves on this coach. Started with the wet tank. blew out a good amount of the dreaded white powder, NO oil, NO water. Went to the front. there are three valves behind the driver wheel. First valve closest to the road dripped 3 or 4 drops of water, NO oil, NO powder. Next valve blew out a small amount of powder, NO oil, NO water. Valve closest to the curb - same as the previous.
So with my limited experience I believe, tell if I'm full of sh*t, is that the compressor is outputting too much oil and has clogged the desiccant cartridge. I am hoping this is not the case but BEFORE I put the reman Haldex unit on I need to know if this is the cause of the problem.
Is it possible that the DA34100 is really NOT compatible (isolation valve or lack thereof) with my 20 year old Wabco 4059825 ? Or do I need to look into a new compressor ?
Ok I'm all ears.
The dessicant cartridge is an annual thing, given most RV use every two years. So yes: New cartridge and o-ring.
IF your compressor was passing oil, several quick cycles would show oil on the floor from the purging of the coalescing filter.