Tony wrote,
>Jarrid, do you think that we could get a bunch of these PRV's made up
>reasonably? Seems to me that we could all use one!!
>Is yours the same as is described in the Alpine guide?
>I remember reading that Dick was using one out of a Hunter?
>Maybe they are available in the U.K. Is there any interest?
>Tony Leeming
>3 bearing crank!(handleless)
Well, as with nearly all small production endeavers, the term reasonable
is relative.
I recommend just doing it yourself (the relief valve that is).
Here are the instructions:
Just chuck the old valve in a lathe, then machine the pip on the end "if
it has one" flush with the base of the hex.
Use the lathe to "drill" a 3/8 inch hole into outside of the hex. be
carefull,and slow,
because when you reach the piston bore, the spring will want to pop out.
After you get the spring and piston out, debur the inside bore to
elliminate any
blemishes from the bore that may impede or even stick the valve open
(this is key).
ap the new hole with a 7/16 fine tap to just inside the bore 1/16 inch.
get a brass 7/16 fine bolt and a stainless steel washer that fits inside
the newly tapped hole.
Turn the brass bolt in a lathe to remove the last few threads, so the
brass bolt can
be turned beyond the end of the threads. Radius the end of the bolt so
that is captures the stainless washer like a bearing.
Clean, Clean, Clean all the parts, then install the piston and spring
and washer.
Put a liberal amount of non-hardening threadsealer to the bolt,
thenscrew it into the
valve body until spring resistance is felt. Turn 2 more turns on the
bolt to insure
adequate oil pressure for startup.
Install the valve into the filter base, then start the engine.
If the pressure is too high or too low, adjust it immediately.
Clockwise rotation will crease the pressure, and counterclockwise will
decrease the pressure.
I recommend adjusting the relief valve to 65 PSI at 3000 RPM.
Oil condition, viscosity and temperatue will all effect the operating
pressure, so adjust
to whatever condition that you feel is appropriate.
Setting the pressure too high, will put more load on the pump, and could
cause the
pump shaft to shear at the pump rotor.
If any one wants a bitmap of the part, I would be happy to comply.
Just drop me a line.
Good luck!.
Jarrid Gross.
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