Deere Mack Posted March 27, 2011 Author Share Posted March 27, 2011 This might help you out some, it's a little fuzzy looking but it should still be legible.CH and CL with Full Trailer Connection without ABS.pdfThanks man! That'll be a big help. I'm going to pick up a rebuild kit for the air dryer tomorrow and see what I cant mess up. Quote Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75023 Share on other sites More sharing options...
Deere Mack Posted March 29, 2011 Author Share Posted March 29, 2011 UPDATE: Replaced air cartridge, purge valve assembly and cleaned base etc. very well. As I mentioned previously changed the pressure regulator and fixed all leaks. Things still aren't right. Air buzzer doesn't go off until about 7o-75 PSI. Also, it seems when you pump out the air that's when the compressor starts to rebuild. Cuts out fine at 120PSI. The only thing I have not done is clean the unloaders in the compressor head. Doing this first thing in the morning. Any thoughts? Quote Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75095 Share on other sites More sharing options...
Rob Posted March 29, 2011 Share Posted March 29, 2011 UPDATE: Replaced air cartridge, purge valve assembly and cleaned base etc. very well. As I mentioned previously changed the pressure regulator and fixed all leaks. Things still aren't right. Air buzzer doesn't go off until about 7o-75 PSI. Also, it seems when you pump out the air that's when the compressor starts to rebuild. Cuts out fine at 120PSI. The only thing I have not done is clean the unloaders in the compressor head. Doing this first thing in the morning. Any thoughts?Have you plumbed a shop air supply fitting into the primary air system of the truck? Do this first, charge the air system to 120 psi, and with truck not running, listen and look for leaks using a spray soap. Dish washing liquid works well for this. Spray everything but be certain to listen for air leakage around the transmission and shift pistons. These may, or may not leak internally. With the engine shut off, place the transmission is low range, high range, and overdrive split if you have it listening for leakage. Take off the intake tube for the compressor and listen for air escaping there also. If the air is leaking back through the compressor head, you main check valve in the wet tank is not sealing. If it is making air but losing it quickly there is a problem. Your low air buzzer ceasing at 70-75 psi is not a problem and normal. Don't forget to check under the dash for leaks also. "O" rings in the brake and trailer valves start to leak as they age.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75104 Share on other sites More sharing options...
Deere Mack Posted March 29, 2011 Author Share Posted March 29, 2011 This is what I found when I removed the Plate to reveal the unloader valves. Cleaned it up good and put a rebuild kit in it. This was the final touch to make all well again. I am convinced that a poorly maintained air dryer is to blame. Rob and rhasler, I appreciate your help big time! I'm grateful for everyone on this site for taken time to help out people like myself. Hope I can do the same some day. Live well! Quote Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75158 Share on other sites More sharing options...
Rob Posted March 29, 2011 Share Posted March 29, 2011 This is what I found when I removed the Plate to reveal the unloader valves. Cleaned it up good and put a rebuild kit in it. This was the final touch to make all well again. I am convinced that a poorly maintained air dryer is to blame. Rob and rhasler, I appreciate your help big time! I'm grateful for everyone on this site for taken time to help out people like myself. Hope I can do the same some day. Live well!Glad to be of help. Good maintenenace can and usually expands the mean time between failure.Now if I could just figger out how to tie my shoes.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75160 Share on other sites More sharing options...
Deere Mack Posted March 31, 2011 Author Share Posted March 31, 2011 Rob, After teaching my 5 year old how to tie her shoes, I can now tell you that there is more than one way to tie your shoes. Very creative monster.I hate to wake a sleeping dog, but got to hearing a leak behind the dash today and found this sensor leaking. Its above the gas pedel and the one to the far left with bubbles coming out of it. Quote Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75246 Share on other sites More sharing options...
Rob Posted March 31, 2011 Share Posted March 31, 2011 You'll have to replace the sensor (transducer) although I don't know what it is for. They are a sealed unit.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75247 Share on other sites More sharing options...
Deere Mack Posted April 1, 2011 Author Share Posted April 1, 2011 Rob, After teaching my 5 year old how to tie her shoes, I can now tell you that there is more than one way to tie your shoes. Very creative monster.I hate to wake a sleeping dog, but got to hearing a leak behind the dash today and found this sensor leaking. Its above the gas pedel and the one to the far left with bubbles coming out of it.Both of these are for the low air buzzer/light. $8.00 ea. Quote Link to comment https://www.bigmacktrucks.com/topic/18451-96-ch613-air-pressure-problems/page/2/#findComment-75281 Share on other sites More sharing options...
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