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Topic: 2001 U320- which tank does the aux compressor fill (Read 777 times) previous topic - next topic

2001 U320- which tank does the aux compressor fill

Appears to be 3 air tanks. Does the auxiliary air compressor go directly to one of the these?  My guess is the smaller horizontal one? Of the two remaining, which one controls the front and which one is the rear?

Thanks,

David
David West
2001 U320 40'

Re: 2001 U320- which tank does the aux compressor fill

Reply #1 –
The smaller tank is the aux compressor.  I moved the tank drain valves from under the tanks to the fender well for easy access.  If no one answers fir you, I will check that as to which tank is read, front
Mike
2001 U320 4010 Build 5878 (Gus)
Wrangle Unlimited Toad
Nacogdoches

Re: 2001 U320- which tank does the aux compressor fill

Reply #2 –
Thanks Mike.  That's what I suspected. I have a small leak and the compressor wants to cycle too often. Then one of my air gauges reads about 75 to 90. (The one on right side of steering wheel).  I thought I would look for both issues when looking for the leak.  After the compressor cycles, you can hear an air leak that releases a little, goes quiet for a few seconds and then leaks again and so on. Any ideas?

David

David West
2001 U320 40'

Re: 2001 U320- which tank does the aux compressor fill

Reply #3 –
Most compressors have a relief valve on the compressor at the pressure switch that when the compressor shuts off will releive the head pressure.  You will hear that valve leak the head pressure when the compressor shuts off.  Those valves also can leak so that would be something to check.
Bill and Joyce, The House2 and Dashboard Pig III
2000 U320 4210 CAI (The House2)
Build # 5733
2019 F150 King Ranch FX4

Re: 2001 U320- which tank does the aux compressor fill

Reply #4 –
Quote from: dwest –
Appears to be 3 air tanks. Does the auxiliary air compressor go directly to one of the these?  My guess is the smaller horizontal one? Of the two remaining, which one controls the front and which one is the rear?

Thanks,

David

My diagram for the '93 U300 show's that the Aux compressor does not fill any tank or even supply pressure to a tank.
There is a dual check valve ( shuttle valve ) to prevent this happening.
1993 U300, 6v92
build 4366
USAF retired, Flight Engineer, C124, C130
 ATP, A & E.  & ex AI

Re: 2001 U320- which tank does the aux compressor fill

Reply #5 –
Lots of timed it is the step solenoid up front that is going bad like that. 
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: 2001 U320- which tank does the aux compressor fill

Reply #6 –
David, I hear options for several things.....it appears you have aux running you think too often and I agree from what you wrote.  Then you note the dash gauge, I guess one only of the two?  They reading the same or different values at the same time?  I seemed to lose track of whether the engine is running, etc.  I suppose that you are parked, engine off, but it might help if we talk.  At one time my aux was trying to also fill the main tanks, caused similar what you have seen.  If you want, send me pm with your phone number and I will see what I can do, had quite a bit to get right with my system on the same model coach you have, most from prior owner mistake and a failing dash air gauge.

mike
Mike
2001 U320 4010 Build 5878 (Gus)
Wrangle Unlimited Toad
Nacogdoches

Re: 2001 U320- which tank does the aux compressor fill

Reply #7 –
John,

The noise I hear is in the vicinity of the step. In fact, I've noticed it operating slower the last few months. Maybe related?

David
David West
2001 U320 40'
 

Re: 2001 U320- which tank does the aux compressor fill

Reply #8 –
Will call tomorrow David but the noise could be air from the two cylinders that raise and lower the outside step or the floor cover that goes over the steps opening in the coach.  Both are good places to find leaks.  You can see the two folding step cylinders by having the step down and look beyond the black vinyl curtain at the back of the folded down step
Mike
2001 U320 4010 Build 5878 (Gus)
Wrangle Unlimited Toad
Nacogdoches