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Topic: Air purge [Fuel system] (Read 338 times) previous topic - next topic

Air purge [Fuel system]

Just curious, where does the air purge get the air from? Just asking because I went to purge, the light came on (yellow) but nothing happened, then light eventually went out. Tried it twice. I have used in many times before but this time I have no air in my tanks so was wondering if that why it's not working...or am i now chasing down an electrical problem.
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 

Re: Air purge

Reply #1 –
Got it purged 👍

Does this look like it's working properly? Just wondering if the sight glass should have more diesel in it while running. This was on high idle about 1000.RPM.
Feel like it just on the edge of pulling air if that diesel drops any lower while running...or.maybe I don't know how this works and I'm off in my thinking.

Video:

Microsoft services
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 

Re: Air purge

Reply #2 –
The air purge starts the electric pump in your fuel filter system and pumps fuel though your filters and back to the tank and I used to bleed the filters and used it a couple of times when it wouldn't start. My site glass usually was about
3/4 full but I guess if the top was pulled off and you could pour diesel into the screen filter up to the top and that should get rid of the air.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Air purge [Fuel system]

Reply #3 –
The filter is one piece top not removable.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Air purge [Fuel system]

Reply #4 –
Quote from: oldguy –
The air purge starts the electric pump in your fuel filter system and pumps fuel though your filters and back to the tank and I used to bleed the filters and used it a couple of times when it wouldn't start. My site glass usually was about
3/4 full but I guess if the top was pulled off and you could pour diesel into the screen filter up to the top and that should get rid of the air.

Once I purged it, the sight glass was 3/4 full of diesel with engine off. It was when i started up the coach when the level dropped which shows in the video.

Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 

Re: Air purge [Fuel system]

Reply #5 –
I meant the metal part that has the O rings in it.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Air purge [Fuel system]

Reply #6 –
Just curious if my video link in post #2 is working for those of you who click on it. I've done video links like this before and some have mentioned that it doesn't work but some do.

...and just to clarify, is the level of diesel in the sight glass where it's supposed to be while the engine is running or should there be more.
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 

Re: Air purge [Fuel system]

Reply #7 –
The video works. When I start the engine again i will look at mine.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Air purge [Fuel system]

Reply #9 –
I'm not able to access your video but I can tell you that my prefilter runs pretty low while the engine is running.  I used to worry that I had leaks in the lines but the engine runs strong and never stumbles so I stopped worrying.  The attached photo is with engine idling.
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI
 

Re: Air purge [Fuel system]

Reply #10 –
Quote from: Geodmann –
I'm not able to access your video but I can tell you that my prefilter runs pretty low while the engine is running.  I used to worry that I had leaks in the lines but the engine runs strong and never stumbles so I stopped worrying.  The attached photo is with engine idling.
Thanks, that's even lower than mine. I also never had any issues or stumbles while driving...just wouldn't start if I was pointed nose down for a day or two. Hoping that the bad o-rings I replaced corrects that and my fuel lines are not the culprit.
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS