I am finally trying to build an air dryer bypass. I reviewed the topic: Air Dryer Bypass Demo, and went to both O'Reilly and Carquest. They quoted OVER $22 EACH for the elbows ( part #2501) in reply #21 !!!!?????
I am preparing our trip from Maine to Mexico, so I really want to get this built.
Any ideas as to where to get these parts? What are they called? Is that a realistic price???Seems high to me.
ALSO.....what size plug do I need for the governor?
Thanks
Glenn,
Try locating shops that deal with heavy equipment hydraulic systems service and repair. I live in the West TX oilfield, and out here you can't swing a dead cat without hitting a hydraulic hose and fittings shop. They all carry those fittings. Prices vary according to greed.
The plug for the D2 governor should be plain 1/4 pipe thread, IIRC. Nothing fancy.
Glenn those hose connections that you need to get off to install the bypass will probably be very tight. I needed a pipe extension over the wrench to break them loose. Be prepared 😁
Nope - I was wrong - memory failed me (AGAIN). Sigh. Anyway, the threaded ports on the D2 are
1/8 inch pipe thread. See below (page 1, bottom right corner):
http://www.plazafleetparts.com/uploads/2/1/9/0/2190100/d-2_governor_maintenance.pdf
Glenn,
Try Hydraulicsdirect.com, I found the 2 elbows and the collar all for $12.70, but then another $15 for shipping. All in $29 with tax
Hydraulics Direct | Online Hydraulics Store (https://www.hydraulicsdirect.com)
This should be the actual parts links
5000 - NPT to NPT | NPTF Pipe Female Coupling | HydraulicsDirect.com (https://www.hydraulicsdirect.com/NPTF-Pipe-Female-Coupling-p/5000.htm?1=1&CartID=1)
2501 - JIC to NPT Elbow | 37 JIC Male to NPTF Male Pipe 90 Elbow | Hydraulics... (https://www.hydraulicsdirect.com/JIC-Male-x-NPTF-Male-Pipe-90-Elbow-p/2501.htm?1=1&CartID=2)
Do both this External Compressor Connection to Add Air to Wet Tank and Service Tanks (https://www.foreforums.com/index.php?topic=37333.0) and a dryer by-pass in one project.
I went to a hydraulic shop, here in Maine. They had the parts I needed. All for $14 !!!!!
Yes, there still are honest folk out there, especially here in Maine.
So school me please on why you want an air dryer bypass installed? What does it do for you?
Bob
Air Dryer Bypass Demo (https://www.foreforums.com/index.php?topic=22007)
I had a forced stop and an $800 tow because the air dryer failed. I can't speak for the OP, but I carry some fittings so the air dryer can be bypassed if it fails.
This allows water build up in the air tanks, but for short-term it is not a worry.
Thanks Chuck, it makes sense. I replaced my air dryer last winter in Arizona. I got it from find it parts and it wasn't the exact same one that I had installed but the same manufacturer. After I installed it and I used a remanufactured one since I didn't know when the last time it had been changed, they charged me $100 core deposit and if I had had room in my bays for it I would have kept it. Initially my air pressure was the same around 110 and it would cut off but I've noticed that recently it's not cutting off until it gets up to 130. I'm not sure why but when I was in Wyoming I had to make a u-turn on a dirt road and I wonder if maybe I got some dirt somewhere but my air dryer is easy to get to right below the air filter on the driver side engine compartment. I don't know if the extra 20 psi hurts the system but it's a concern. I may look at it when I get to Mexico.
Bob that would be the D-2 governor that sets the pressure. I don't know why it changed but 130 is what I have mine set to.
I would say don't worry about it. Initially, your air compressor was cutting out (at 110) way too soon. I agree with The Other Chuck - 130 psi cutout is just right. That's also where I have my D2 set.
Okay so after I change the governor out initially I was holding at 130 PSI which I was happy with until I got on the road and then it was 140 and then 150 again. First rest area I got out and checked the wet tank and not only did a cup of water come out but they're also seem to be some white powder residue mixed in with it and of course I knew with that meant. My air dryer has failed. It's funny we were just talking about this and I'm wondering why somebody would need to bypass the air dryer and a couple weeks later I'm having to do the same thing myself. Funny how that works out huh? Anyway as I'm in Oklahoma City now where they have a ton of fracking and petroleum in Oklahoma I figured no problem. On getting here it's now Saturday so of course 95% of the hydraulic hose companies were closed but Midwest hose and specialty was open until noon and it was almost 11:00 so I got in the car ran over there and was able to get pretty much what I needed. The elbows were $5.09 a piece for a total of $10.18 the straight connector in between was $3.91 I got three different plugs for a total of $3 for all three of those. I bought some thread sealer that was 1525. And I spent way too much money on some hose that I'll use on my generator to replace the air heater hose that O'Reilly's had that's already melted.
So about $38 to bypass your air dryer. Plus a couple busted knuckles a broken thumb nail, two or three scrapes on the fingers and who knows what else fun is in store for me to install it. I think I'll wait till tomorrow though. I've got the tools and I've replaced the air dryer last winter.
No dryers available there?
Scott
Please understand that the dryer removes the moisture that can be quite damaging and if it freezes dangerous to brake operation.
Scott
Oh I know what it does. Which is why I changed it out last year as preventative maintenance. Might have been better to just change out the desicant cartridge for all the good it did me... There may be a rebuilt one here but I already have a rebuild kit in the mail. It's not that far from Oklahoma City to Uvalde Texas. I'll just keep draining the wet tank it'll be fine.
I looked on Napa's website but all they wanted to do is ship it to me, I don't have time for that.
Besides it looks like having a way to bypass your air dryer in order to do a get home is a good thing to have in the spare parts inventory. Especially since I'll be heading into Mexico.
Agree! For what the parts cost, cheap insurance. :thumbsup:
I carry 2 kits - one for me and one to give away if I ever encounter another Forum member stranded on the side of the road.
The contamination might have been in the system before you replaced the dryer and it just took awhile to show up.
Chuck, besides the 2 large flared elbows and the coupler to put them together, what other plugs or parts are needed to do the bypass? I have the flared elbows and coupler already, just want to make sure I have whatever else may be needed, just in case.
Thank you
The only thing I can add is that my 2 hoses on the dryer were different lengths which means one side of the U was longer than the other side. But that is an easy fix if yours is the same.
Doesn't something have to be plugged or capped?
The air line from the governor but I believe he bought the plug for that.
See post linked below:
Air Dryer Bypass Demo (https://www.foreforums.com/index.php?topic=22007.msg166367#msg166367)
Okay so I installed it today which was a fairly easy job as I had the tools. I disconnected the inlet hose on the air dryer and the outlet hose to the wet tank and connected those together with the parts listed. I used a Teflon paste to seal the threads and I had a little bit of trouble getting it lined up while laying on my back on a layer of heavy gravel. Getting to the communication air hose on the back of the air dryer was difficult so I just remove the air dryer and then got it off that way. I noticed that there was some oil in that line as well as desiccant powder in the out flow of the air dryer going to the wet tank. I also remove the desicant cartridge and looked in. The purge valve at the bottom seem to have some oil on it.
So at this point I'm wondering if my compressor is passing oil through it. I expect that's probably not normal? I did as crane man suggested and while I was doing all this I figured I might as well, took the D2 governor off and sprayed some corrosion x down the middle hole. When I did that I realized that the gasket that I put on wasn't lined up correctly although air was definitely getting through and and obviously my air dryer has failed.
Saturday I'll be in Texas and I will rebuild the air dryer and put it back together and hopefully everything will be fine. If not I'll have the air compressor rebuilt in Mexico. If that's what it needs anyway.
After I installed everything sprayed some corrosion x into the governor hole into the compressor put everything back together again started the engine and let it get up to 90 PSI then I opened up the wet tank and pretty much dry air just came out no more desiccant. I let it run at 1500 RPM and it got up to about 130 PSI. Stopped there, I went back and crack the wet tank and pretty much just dry air came out with no desiccant that was observable. I sprayed some PB blaster in the purge valve after spraying it with brake cleaner. When I rebuild it we'll see if that changes anything.
In the 3rd pic. of the compressor you can see 2 Allen head cap screws. If you remove them along with those washers, then the piece that the governor bolts to will just slip off the compressor. This action will expose the unloader assembly which you can remove and clean. This is the simplest unloader assembly to inspect and clean there is. The reason I mention this is if the compressor is building pressure then it most likely is OK and needs no other fixing. You and Mark can clean the unloader assembly in less than an hour.
Mike
Thanks mike. I did see those bolts and figured that's what was underneath there. Hopefully the corrosion x will relieve things enough that I won't have to do that but that would be the next step after rebuilding the air dryer. And probably I should do that at the same time. Cuz that's what the problem seems to be is unloading the pressure when it gets to the set point. What about the oil in the small communication line? Any input on that?
Thanks
Bob
Bob,
1. Won't hurt
1a. Yes just to be safe.
2. With the unloading pressure set point changing it is possible goobiede gop fouling the operation of the unloader valve.
3. That tells the dryer when to blow down and drain moisture. With the dryer not blowing down properly this line needs cleaning to make sure the system is a clean as possible. When the dryer works properly that moisture in the line will be expelled.
Mike
So update since installed. I drove another 250 miles almost with the bypass in and my pressures stayed like they should maybe a little higher than with the old Governor but nothing major hovering between 1:20 and 1:30. Of course no purging is involved because there is no air dryer. I'm now at Mark's AKA text hubs place and Uvalde Texas and plan on rebuilding and reinstalling before heading south. As someone recently told me, you really don't need an air dryer as long as the wet tank gets drained on a regular basis at least for short distances.
Chuck I don't think that there were pre-existing issues with my air dryer. I changed it out in Arizona, just because I didn't know when the last time any maintenance on it had been done. And it worked fine for 6 months at least and couple thousand miles of driving. Maybe I'll find out when I rebuild it but maybe I won't I may have to replace the whole unit. Mark's got a spare so I may buy that from him or replace it with one from finding parts. Not sure yet.
NAPA stores are good places to source a complete rebuilt air dryer (if required). Be sure you keep the old unit until after you have transferred all the fittings to the new one, then you can return the old one to receive a refund of your core deposit.
This was for two sets. Hope they are the correct fitting. NO shipping cost also.
Scott
If you have any questions, please email us at sales@HoseandFittings.com
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Release Date: 10/30/2021
SKU Name Retail Qty Total
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2408-04 37° Seat JIC Hex Plug $0.4543 2 $0.9100
2501-12-12 Male JIC x Male Pipe 90° Adapter $4.4621 4 $17.8500
5000-12-12 Female Pipe x Female Pipe Adapter $2.6623 2 $5.3200
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After rebuilding my air dryer I found that it still did not work properly as it was in purging. Ordered one from the local Napa store and will be here tomorrow. I'll have to take my old air dryer off again. Again take the new parts that I just put on it off. Put the old parts back on as that's going in as the core. I'll install the new one or just keep the bypass on until I get to Mexico. Not sure exactly why it failed so quick and I probably could get it replaced under warranty but I just don't have time. Kind of disappointing. I'm wishing now that I just replaced the filter and the desiccant cartridge and called it a day on the old one.