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All,
I'm having difficulty understanding the need for the bladder,
and it seems like an additional complication and an additional point of
vulnerability along with the line. How would this work:
1. Install a bleed valve at the uppermost point of
the motor housing.
2. Install a fill valve at the bottom of the motor
housing.
3. Attach a fill line (equipped with a pressure gauge) to
the fill valve. Purge all air from the fill line prior to attaching it to the
valve.
4. With the bleed valve open, fill the motor from the
bottom until oil discharges from the bleed valve.
5. Turn the motor shaft by hand and vibrate the motor to
release any trapped air bubbles. Close the bleed valve and allow the motor
to sit for a couple of days undisturbed.
6. Open the bleed valve and add more oil to drive any
residual bubbles out. Close the bleed valve while pressure is still being
applied to the fill.
7. Adjust the pressure from the oil pump to the desired
pressure, then close the fill valve.
8. Release the pressure on the oil pump/fill line, then
disconnect the fill line.
This seems logical to me, but I'd like to hear from the voice
of experience. Does 14 lb. seem like a reasonable differential pressure
for set up? I expect to start with new Minnkota motors, and I haven't
addressed sticking with the factory seals vs retrofit seals. My intended
operational depth is 300 feet.
As always, comments and criticisms are eagerly
invited.
Thanks,
Jim
In a message dated 12/4/2010 10:07:34 P.M. Central Standard Time,
alanjames@xtra.co.nz writes:
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