air dryer
#11
09-05-2008, 02:47 PM
If you think it is the air dryer rather then rebuild it throw it away and buy a new one. If this doesn't cure problem next step is to throw entire truck away and buy a new one.
__________________
Don't trust anybody. Especially that guy in the mirror.
#12
09-06-2008, 11:32 PM
Re: air dryer
Originally Posted by heavyhaulerss
I am not sure what causes the air to dump when it reaches a certain psi, but mine dumps air every 7 seconds. both in dash air gauges stay on 120 psi. they dove move or fluctuate. they stay at 120 while driving at hiway speeds. 55-70 mph. i put on what i think would be called an air govenor. it mounts to the air compressor & has a couple air lines connected to it. the air govenor has not changed anything. even at an idle the air dumps every few seconds. the air dryer is original equip. 13 years old. since ive eliminated the govenor(the cheapest part to replace) would the air dryer be the next thing to replace or could something else be making my air pop off so frequent?
If the air dryer is not serviced every couple of years, it can cause damage to abt everything in your air system. ...as for the purge cycling of the dryer, that is likely caused by an air leak upstream of the pri/sec air tanks.
__________________
Bob H
#13
09-18-2008, 11:48 AM
I can tell ya that mine did the samething and its had a new governer and dryer and everything that goes with it and guess what it still F%#$ING does it so what the other posters said about air leaks up stream is more that likely the problem so dont waist your money untill you check that out. My question is where should I start to look at?
#14
09-18-2008, 04:50 PM
Could also be the unloader valve in the compressor. If it doesn't work right the compressor doesn't unload and keeps pumping so it keeps purging out the drier.
What model of drier do you have and what compressor?
#17
09-26-2008, 07:45 AM
I've seen compressors cause that exact thing, the valves in the compressors.
Also, I service my air dryer(purge valve and dessicant) once every fall. I've seen far too many trucks stuck when the purge valve stays open, draining all the air. This is from moisture. Not going to happen to me.
#18
09-26-2008, 11:17 AM
It's always a good idea to determine in advance what type of fittings it would take to bypass the air dryer in an emergency, then carry said fittings (and the necessary tools to perform the bypass) along with you on the truck.
That would enable you to keep going until you can get somewhere to fix a stuck purge valve.
__________________
If you can't shift it smoothly, you shouldn't be driving it. |
