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"Remove the filler plug from the reservoir, taking care not to damage the
gauge. Fill to within
3" of the top of the sight glass with aircraft
ML-H-5606 hydraulic fluid, or Type "A" automatic transmission
fluid may be
substituted. V-63 Morgan Out Island 416 Maintenance Procedures "Loosen the
two valve screws on
the relief valve by turning them counterclockwise (with
a screwdriver or 9/16" wrench) until pressure is removed
from spring. (Be
careful not to unscrew it completely or the screw could become lost.) "With
filler cap in
place, pump the reservoir to 55 psi. 0il will start flowing
into the lines, and the pressure and fluid level will drop.
Keep pumping air
info the system until the pressure holds fairly constant. Should the fluid
level drop to approximately
2" from the bottom of the reservoir, refill the
reservoir with fluid and re-pressurize, if the pressure and fluid
levels are
not holding fairly constant after a few minutes, it is better to check for
leakage at all joints. "Next,
go to the helm at the highest level and turn
10 to 20 turns starboard, pumping the air
out of the lines and back
to the reservoir. In three to five minutes you
should be able to feel and hear oil coming into the pumps. "Again,
the
pressure and oil level should be checked. The fluid level should not drop
below 2" level in the sightglass.
If the fluid level is low, the reservoir
should be filled to within 3" of the top before it is again pumped to 55
psi. Do not overfill, as the 3" capacity in volume of air is needed.
"If one station is involved, it should
require only 5 minutes of purging.
Since the sintered bronze filter extends up into the reservoir about 2", it
is necessary to keep the oil level above the filter to prevent air from
being pumped back into the system. "Keep
the air pressure at approximately
55 psi during tills time and turn the wheel 20 turns each way.
"As
a progress check, close the valve screws on the relief valve and see how
many turns are required from hard over to hard
over. It will likely be
necessary to close and then to open a half turn on the valve screw at this
time to make
certain the cylinder is stroking to purge all the air from the
cylinder. "With the valve screws open 1/2 turn, pressure
can be built up in
the system which will cause the slave cylinder to stroke. If a second
steering station is in
the system, it will be necessary to purge it the same
as the first. It should not require as much time since the lines
and
cylinder are now filled with oil. Several quarts of oil may be required for
a large boat. "Again, we should
check for oil leaks. If a line needs to be
disconnected for any reason, let the air pressure out of the reservoir
before disconnecting the line. If it is now determined that
the proper number of turns lock to lock have been obtained,
we should
re-check the oil level, and leave 20 psi of pressure on the system.
Close the valve screws on the
relief valve. 'When checking the number of
turns, note that it is possible to pump over the relief valve (factory
set
is 750 psi). This provides a safety feature for expansion."
I missed the first part of this thread,
but have overhauled both ends of
the Hynautic steering system. I got good info and parts from a place in
Florida
called Fluid Tech (can't find the phone #) - ask for Mike.
The helm is messy but straightforward; there are
lots of little parts
inside, I believe 18 pistons among other stuff.
The ram is simple but requires you to
make a nut driver for the round,
slotted nuts. The kit is something like HS-4 or HS-6, depending on the
age of the
ram.
The most important item IMO is to use real hydraulic fluid, not ATF. ATF
works, but make the steering
rough and eats up the seals.
The last time the ram leaked it lost all fluid w/in 30 minutes, so I'd
recommend
carrying at least 2 qts of spare fluid and fix it before it
begins to leak badly, which can happen quite suddenly.
HTH,
John W
OI 511 Amante
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