540
5
AUXILIARY EQUIPMENT ON BOARD
Studio ti 03312 540-04usa
77
Fill & purge procedure
NOTE: these instructions will result in hydraulic oil flushed in and out of the
system. Oil can be reused if filtered through a fine mesh screen such as the
kind used for gasoline. If unable to filter oil, an additional bottle of oil is required.
“Bleeder” may refer to cylinders with either bleed tee fittings or bleed screws.
If fitted with bleed tee fitting, open bleeder by unscrewing bleed nipple nut
two turns.
If cylinder is fitted with bleed screws, open bleeder by removing bleed screw
completely. Just loosening bleed screw will not cause sufficient oil flow to
purge system. (Helm filling can be done faster if oil is poured into the helm
prior to connecting filler tube and oil bottle.)
Cleanliness is important when handling hydraulic oil. Prevent contaminants
from getting into the oil.
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Step 1
Screw the threaded end of the filler tube into the helm filler hole. Remove
the cap from the oil bottle and holding upright, screw into the filler tube
bottle cap. Turn bottle upside down and poke hole in the bottom of the
bottle. Fill the helm pump full of oil (oil should always be visible in the
filler tube). Use the next bottle at any time throughout the procedure when
the oil level drops in the filler tube.
Do not proceed with Step 2 until helm is full of oil.
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Step 2
Turn the steering wheel clockwise until cylinder rod is fully extended on
the left side of the cylinder. Open left side bleeder.
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Step 3
Holding the cylinder rod (to prevent it from moving back into the cylinder),
turn the steering wheel counterclockwise until a steady stream of airfree
oil comes out of the bleeder (drain out about 1/2 bottle of oil as required).
While continuing to turn the wheel, close the left side bleeder and let go
of the cylinder rod.
NOTICES
This procedure requires two people. One person may not be able to
remove all the air from the system, which will mean spongy,
unresponsive steering.
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CAUTION
During the entire filling procedure, oil must be visible in the filler tube.
Do not allow the oil level to disappear into the helm - this may introduce
air into the system and increase your filling time.
NOTICES
HYDRAULIC OIL REQUIREMENTS: two quart bottles for single station
and single cylinder systems.
One additional bottle for each additional helm, cylinder, or auto pilot.
S
CAUTION
Use only your hands to restrain the cylinder rod. Do not use vise grips,
pliers or other metal tools to stop cylinder rod from moving - these tools
can damage the cylinder rod, causing leakage to occur. Ordinary hand
strength is sufficient to hold the rod.
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