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Another oil pressure question

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GA Dave

01-30-2007 18:42:17




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I installed a automotive oil pressure gauge on my IH 240 U. Had to replace the original copper line with a plastic one because threads were not compatible with the auto gauge. Question, do I need to bleed the air out of the line? 50 psi at startup to 20 psi idling warm. Will bleeding the line change the reading? Thanks to all. David.




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willie in mn

01-31-2007 03:52:36




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 Re: Another oil pressure question in reply to GA Dave, 01-30-2007 18:42:17  
Dave
Bleeding the line to gauge isn't necessary. A gas(air) under pressure exerts equal force in all directions. Any delay of force from the pump to the gauge will be within milliseconds, quicker than the eye can detect.
That's my story & I'm sticking to it.
Willie



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GA Dave

01-30-2007 19:09:08




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 Re: Another oil pressure question in reply to GA Dave, 01-30-2007 18:42:17  
Thanks Bob. I was posting the same time as you. BTW. What is this switch grass? David.



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GA Dave

01-30-2007 19:03:21




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 Re: Another oil pressure question in reply to GA Dave, 01-30-2007 18:42:17  
Thank you Jim. Now to a really serious question. Will my 240 burn switch grass in the future? David.



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Janicholson

01-30-2007 19:42:18




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 Re: Another oil pressure question in reply to GA Dave, 01-30-2007 19:03:21  
Some:
Switch Grass (A prarie Grass that grows well on marginal land and can be used for celulose based production of Ethenol) Will likely be used for fuel production. In my opinion (studied)it will be part of the bridge to alternate fuels less dependant on acres of food producing farm land. JimN



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City-Boy McCoy

01-31-2007 03:40:28




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 Re: Another oil pressure question in reply to Janicholson, 01-30-2007 19:42:18  
I see. And what is a typical oil pressure reading for switch grass? mike



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Janicholson

01-31-2007 06:32:43




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 Re: Another oil pressure question in reply to City-Boy McCoy, 01-31-2007 03:40:28  
4 KG/M squared more than sweetgrass, and 3 less than Crab grass. JimN



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City-Boy McCoy

01-31-2007 18:40:48




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 Re: Another oil pressure question in reply to Janicholson, 01-31-2007 06:32:43  
I love you guys, and I love this forum! It is great we can laugh at ourselves... mike



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Bob M

01-30-2007 19:01:12




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 Re: Another oil pressure question in reply to GA Dave, 01-30-2007 18:42:17  
Dave - Like Jim says below,bleeding the air out of the line will only make the gage more responsive to pressure changes. Ie. it will respond more quickly. But it won't change the final pressure reading once it has stabilized.

Myself I'd be inclined to bleed the gage line. Simply loosen the fitting at the gage, then with the ignition turned off bump the starter a few times until oil appears at the fitting. Then retighten the fitting.

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Janicholson

01-30-2007 18:50:48




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 Re: Another oil pressure question in reply to GA Dave, 01-30-2007 18:42:17  
The only effect of the air is to reduce the response time of the gauge. As the air compresses and expands, the reading will lag reality. (I would bleed as much as possible from it) JimN



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