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Hi, fellow rotary enthusiasts....I just got back from the local hydraulic
hose shop, and had a couple of oil cooler lines made. I have two different
size metric banjo fittings (on opposite ends of the hose), meaning that both
the banjo fitting, bolt and tubing sizes are different, so I could not have
one size hose made that would accept the two different sized tubings, so
they came up with the following solution. It uses standard hydraulic
compression fittings with a steel sleeve. This actually is a better
solution, because normally the orientation of the hose ends are critical
when you have 90 degree bent tubing....hydraulic hose is normally difficult
to twist, so the fittings had better be right the first time. With the
ferrule/compression fitting, however, it is easy to preassemble the unit on
the engine, turn the fittings in the direction you need them, then tighten
the compression fittings. (Much like doing a trap under the kitchen
sink.....preassemble everything, then tighten the fittings).
The other plus is that he used a single braid hydraulic hose that is
much more flexible than the standard 3000 psi double braid hose. This hose
is rated for 2250 psi. (more than enough for 13b oil pressure). The
compression fittings are rated for 3000 psi. They stock them in metric
sizes, so it fit perfectly on both sizes of the tubing( that was attached to
the banjo fittings).
They say that a picture is worth a thousand words, so here they
are....
I hope this information is of use to someone. Paul Conner, 13b powered
SQ2000 engine runs great.
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