[AT] High oil pressure a bad thing?

[Howard Weeks]

The "Operator's Manual" on my JD 70S recommends straight kerosene
in the engine "idling" for a few minutes to flush it out. Same for 
the transmission except to run the machine around for a few minutes.  
I have flushed that engine and many others, including car engines, 
that way. Never had a problem with any of them.  It is amazing how 
much crap that will flush out of an old tractor. 

Howard in Georgia

On 23 Jun 2007 at 8:06, Dean Vinson wrote:

> Dudley wrote:
> 
> > But if by high oil pressure you really do mean high oil pressure as in
> > you've measured it with a couple of different gauges both of which give
> > the same high reading) then I would suspect that the tractor might have
> > a clogged oil artery somewhere.
> 
> Danny wrote:
> 
> > I have always been told if on a diesel engine the oil pressure was too 
> > high it would result in leaky seals and gaskets.. As well as it is 
> > reducing the life of you oil pump as its working harder than it needs too.
> > http://lubricants.s5.com/oil_pressure.htm
> 
> John wrote:
> 
> > FWIW, about 2 seconds after it fires up, the M here pegs the oil 
> > pressure gauge. Motor was last torn down in the mid '60s and the gauge 
> > is the original. Maybe this is typical of M's?
> 
> Thanks, gentlemen--good comments all, and that's a good website.  I haven't
> measured the pressure in my tractor, other than to observe the normal oil
> pressure gauge (new replacement gauge from OEM, no numbers, just an
> operating range). I suspect John's right that a high reading is typical of
> Ms, but it also wouldn't surprise me at all if some of the oil galleries are
> somewhat gunked up.
> 
> The engine has good compression and I don't hardly do anything with the
> tractor anyway, so I don't plan to tear the engine down unless I run out of
> other projects some winter and decide to do it just for the fun and
> education.  I changed the oil and filter when I bought the tractor last
> year, but I didn't do anything with the oil pan or pump.  But it drips some
> oil from around the oil pan, so I've been thinking I ought to pull that off,
> clean everything up, replace the gasket, and change the oil again anyway.
> Whatever may be going on in the galleries, clean oil would be better.
> 
> Somebody just mentioned in another thread that before changing oil, they
> used to pour some kerosene in on top of the oil and then run the tractor at
> idle for a few minutes.  I like the idea of really flushing everything clean
> every time, but since I'm not starting with a freshly rebuilt (and known to
> be clean) engine I'd worry that rinsing kerosene or diesel or something
> through it now might cause more problems than it fixes.  Anyone have any
> success trying this?
> 
> Dean Vinson
> Dayton, Ohio
> www.vinsonfarm.net
> 
> 
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Howard Weeks
Harlem, GA 
K5JCP