On Mon, 27 Aug 2007 08:04:59 -0400, Wayne.B
wrote:

On Sun, 26 Aug 2007 16:35:02 +0700, wrote:

Early on (1920) Fairbanks-Morse mad at least one 15 HP semi diesel
that used the crankcase to pressurize air for the 2 stroke engine The
engine lubrication was by a mechanical oil pressure pump pumping oil
to the two main bearing shells and to the cylinder.

I assume the lube oil got burned, or was it reclaimed in some way?

From looking at pictures and drawings the engine was constructed much
like any other horizontal engine of the same era except that the
"crank case" was closed on all sides. The main bearings were simple
babbeted bearings with caps lubricated by an external lube pump
connected through external "oil pipes". A third oil line ran to the
cylinder and I assume that some of the oil that lubricated the piston
dripped down on the horizontal connecting rod and flowed back to
lubricate the connecting rod ends. The manual refers to a "oil tube"
on the connecting rod connected to the big end.

The oil pump was a cam operated devise as the manual discusses "giving
the oil pump several pumps prior to starting the engine".

So essentially the engine had a constant loss lubrication system which
was not unusual in that era. I have seen other horizontal semi diesel
engines of the same eras that had oil cups or drip oilers on both main
and connecting rods.




Bruce in Bangkok
(brucepaigeATgmailDOTcom)