RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 06-06-2020, 02:04 PM   #1
Junior Member
 
Join Date: May 2017
Location: Vernon, Fl
Posts: 14
Purging issues

Hey! This is Cathie and Kevin with another question. We have a 1998 American Eagle with a Cummins 8.3 C mechanical. The air dryer is purging every 20 seconds. We replaced the air compressor, unloaded valve, and the governor. It still purges every 20 seconds. We put a gauge up to the t on the pressure side of the governor. We watched the gauge while it’s running and the gauge goes to 125 purges back to 100 psi. The repeats the cycle. Question is we have a 105 psi to125 psi governor. Does ours need a 90 to 125 psi? If so do you have a part number?
__________________

fleshmates is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-06-2020, 02:33 PM   #2
Senior Member
 
Join Date: Jul 2014
Posts: 22,473
You have a leak in the signal line from the wet tank or the tank itself. That's the small line coming from the first ( wet ) tank to the governor.

The wet tank is probable a section of one large tank. You can ID it by it having 2 drains on the bottom and a welded seam around it. The short section is the wet tank. Its also the tank that the output of the air dryer feeds.

Put your gauge in the wet tank drain and see what pressures it holds.

One other possibility is a bad check valve on that same wet tank. With a bad check valve, the wet tank will drain back thru the air dryer. Sounds normal but its not. The wet tank needs to hold pressure to keep the governor from kicking in again and again.
__________________

twinboat is online now   Reply With Quote
Old 06-06-2020, 02:43 PM   #3
Junior Member
 
Join Date: May 2017
Location: Vernon, Fl
Posts: 14
Purging issues

The green 1/4 in hose coming from the wet tank to the governor - we hooked an air gauge to that line and started the engine. We ran into 125 on the gauge, shut it off and watched the gauge. Twenty mins later it was still reading 125 psi. We put the gauge on the t for green line going to the governor and started the engine. Ran it up to 125 then it purged back to 100 psi. The governor on it is a 105 cut in to a 125 cut off. We think we may have the wrong governor - we might need a 90 to 125 psi governor.
fleshmates is offline   Reply With Quote
Old 06-06-2020, 03:04 PM   #4
Senior Member
 
Join Date: Jul 2014
Posts: 22,473
If you hooked the gauge to the green line, without a T , then the check valve should be good, since the wet tank is holding.

Now, take the line from the govorner, to the air dryer off at the dryer and plug it. It won't purge but see if it cycles often.

Air dryer purge valve could be bad. It shouldn't be purging that much air.

One other thing, did you plug the unused ports on the replacement governor ?

The only port open should be marked exh.
twinboat is online now   Reply With Quote
Old 06-06-2020, 03:24 PM   #5
Junior Member
 
Join Date: May 2017
Location: Vernon, Fl
Posts: 14
Purging issues

We unplugged the unloaded line to the dryer - held my thumb over it and it sends a signal to the dryer every 20 secs so we think the dryer is doing what the governor is telling it to do.
We did the holes on the governor right only exh and where it bolts to the unloaded are open.
We are still thinking we may have the wrong governor.
We appreciate any and all suggestions. We feel like we’ve tried everything.
fleshmates is offline   Reply With Quote
Old 06-06-2020, 03:59 PM   #6
Senior Member
 
Join Date: May 2010
Location: N.E. Florida
Posts: 1,170
Make sure that you are not strictly relying on your jacks to support the coach while you are analyzing all of the air system activity!



You need to have some jackstands that will support the weight of the coach if one of your jacks fails.


But, regarding the governor, here is the one that that has always worked well on my coach which is a sister to yours:


https://www.amazon.com/Control-Gover.../dp/B071P24RPX


Purges at 125 PSI, calls for more air at 90 PSI.



You can get it online or at any heavy truck shop.


Keep us posted on how you solve the problem!


Good luck!
__________________
DaveS
1998 American Eagle 40EVS
FormerBoater is offline   Reply With Quote
Old 06-06-2020, 04:05 PM   #7
Senior Member
 
Join Date: Jul 2014
Posts: 22,473
You can adjust your governor but that's not the issue. Take the cap off the end, loosen the lock nut and turn the screw out to lower the set points.

Is your governor mounted to the compressor ?
Or is it using another line to the compressor unloader valve.

Put your gauge in the wet tank drain and see if psi is dropping after purge. Shouldn't.
twinboat is online now   Reply With Quote
Old 06-06-2020, 04:23 PM   #8
Junior Member
 
Join Date: May 2017
Location: Vernon, Fl
Posts: 14
Purging issues

Thank you for all of your help. We are going to a heavy duty truck store Monday. We still think that’s the issue!
fleshmates is offline   Reply With Quote
Old 06-09-2020, 08:25 PM   #9
Junior Member
 
Join Date: May 2017
Location: Vernon, Fl
Posts: 14
Resolved purging issues 🤗

After we spent hours on the phone talking with Haldex, Cummins tech support, compressor rebuilders, and a local diesel mechanic ( who was familiar with our older Cummins) we finally got an answer. Our local elderly mechanic stated after everything we did there was no way it should be dropping 25 psi in an 8 second purge. So, we ordered the lower housing repair kit for the Purest Air drier (P/N DQ6053 for $55.95). We purchased it from Anything Truck.com - their tech said he thought it was the purge valve also. We took it all apart and it looked clean- nothing to indicate it was worn out. We put the new parts in - new O-rings, started it up and the compressor went to 125, purged and only dropped 5 psi at each purge like it’s supposed to - allowing the governor and unloader to work correctly. Compressor finally turned off like it’s supposed to - problem solved!
Compressor Rebuliders - 708-430-0030 talk to Bill or JR. The compressor (QE 296C) was only $315.00 with a $200.00 core - included in this is shipping both ways. Cummins wanted $1400.00 for a remanned one, plus shipping!
Anything Truck was amazing to work with!
Hopefully, this will help someone else!
Thank you all for your help!
__________________

fleshmates is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Purging Air Every 30 Seconds (long) LPD218 Freightliner Motorhome Chassis Forum 21 10-22-2013 05:46 PM
need help purging propane line dsilva iRV2.com General Discussion 9 12-12-2012 07:37 AM
Purging Torgue converter Fluid M&EM Workhorse and Chevrolet Chassis Motorhome Forum 8 05-01-2005 02:27 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 12:44 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×