Skip to main content ↑ ↓
Topic: 99' U320 air brake high pressure (Read 1894 times) previous topic - next topic

Re: 99' U320 air brake high pressure

Reply #25 –
Quote
It was not a  D-2 governor, but it was very similiar but had extra air outlets and was one of the Bendex governors replacing sob.
If it was not a D-2 governor what was governor did you use? Part Number?
The selected media item is not currently available.Barry BEAM #16014
2003 U320 40' AGDS
Beamalarm, Foretravel technical help and specifications
"Whatever the mind can conceive and believe, it can achieve"

Re: 99' U320 air brake high pressure

Reply #26 –
Not a clue, only ever used the D-2, so who knows what  could be gotten out of the wood work??
Might be a very old prior to the D-2, who knows.
I will ask my supplier about this tomorrow and let you know.  Maybe the SOB can provide a pix of this jewel.
Luck
Dave

Re: 99' U320 air brake high pressure

Reply #27 –
Bought a D2 haldex air governor at NAPA for $14.02. Looks just like the one on my coach. Will probably never need it now that I have a spare.
Felix and Gail Mathieu
99 U320
Jeep Liberty CRD
Build number 5522

Re: 99' U320 air brake high pressure

Reply #28 –
Our D-2 type of governor had an open female threaded hole, used as a vent to the air.

I felt dirt, water, etc could enter the governor, so I screwed in a brass hose barb fitting into the vent hole and ran about a couple of feet of rubber hose down that is open at the bottom end.

Re: 99' U320 air brake high pressure

Reply #29 –
Concerning the air compressor D-2 governor,
After checking with 3 local supply houses, the word seems to be the D-2 made by lots of outfits, Bendix, Midland and others, is the only governor they see EXCEPT for some foreign truck systems.
The D-2 is very versatile, capable of many different setups including the alcohol injection or pop off the air dryer.
Lot of ports / positions/ options.
Because of the different setups possible, it is REAL important to match the holes with the old unit or you can create a crazy, not operating correct system.
Have a ball
Dave

Re: 99' U320 air brake high pressure

Reply #30 –
Dave,
Did you see this post I saw elsewhere?  The last paragraph tells all.

"I work on the tech team at Bendix and I've read some disturbing things throughout this thread. First of all, 150 psi is the MAX rating for every Bendix air brake system component (same for all brands). So it is not ok for a system to be running that high.

Second, when adjusting a governor, turning it CW will decrease the pressure. CCW will raise it.

There are many misconceptions when it comes to the air dryer. The rule of thumb is that if you are not dumping air from the purge valve while trying to build to system pressure, which means you are stuck on the side of the road, it's probably NOT an air dryer issue. 90% of the time it's the compressor unloaders that are faulty and unfortunately, all the noise is at the dryer. The governor and dryer most often get changed first without success.

In this situation, if the air dryer never makes a single noise until 140 psi, then I believe the governor is set too high or gauges are off. Put a gauge in either the "res" port on the governor or the "wet" tank (1st tank the dryer delivers to). That is the pressure that the governor is making its decisions off of.

I can count on one hand in my 12 years of being an air brake expert where the governor was actually the problem. But that's only with Bendix governors. I can't count the amount of times that knock off governors (overseas cheap junk) malfunction and cause issues in the system."
1994 U225
build #4514

Re: 99' U320 air brake high pressure

Reply #31 –
Quote from: Barry Beam –
Quote
It was not a  D-2 governor, but it was very similiar but had extra air outlets and was one of the Bendex governors replacing sob.
If it was not a D-2 governor what was governor did you use? Part Number?
It was on a Peterbilt with a big Cummins under the doghouse.  And a very long time ago, so my memory is lacking at to the model of the governor.  But the other brand was a Airco which was throw away junk.
1994 U225
build #4514

Re: 99' U320 air brake high pressure

Reply #32 –
PatC,
I would never leave coach at any truck stop for work while I had lunch.  I have also had issues with TSA  shops even while I am watching them.
It just proves that just because a person says they are a mechanic, does not mean he knows any thing.  And yes, a simple governor has baffled many wannabee mechanics with too many pipe plug holes and not enough pipe plugs.
 ;D
Dave