Monterey Boats Sport Yacht 330, Owner'S Manual

Page: 30 / 186

330 SPORT YACHT
Under normal conditions, with engines running,
a pressurized hydraulic oil supply is in a standby
mode, ready to be directed to the steering cylin-
der as dictated by the steering wheel and power
steering valve. Turning the steering wheel left
or right causes the power system to go from
‘standby’ into ‘operating’ mode and pumps the
fl uid in the hydraulic hoses which activates the
hydraulic cylinder, causing the outdrives to turn.
A slight clicking sound may be heard as the wheel
is turned. This sound is the opening and closing
of valves in the helm unit and is normal. In the
event of a power source failure, hydraulic oil is
automatically pumped directly from the steer-
ing helm into the steering cylinder, providing the
helmsman with manual backup steering.
An oil reservoir, engine hydraulic pump, and a
reservoir at the helm allows easy system fi ll. It
is important that the fl uid level in the reservoirs
is checked frequently and maintained at or near
the maximum level. Both reservoirs use the same
hydraulic fl uid.
Refer to the engine and steering system manu-
facturer owner’s manuals for specifi c information
on the operation and maintenance for the steer-
ing system.
Helm and Outdrives
The steering wheel can be tilted to fi ve different
positions by activating the tilt lock lever located
on the bottom side of the helm. When the lever is
released, it automatically locks the steering wheel
at or close to that angle.
Dual engine sterndrive boats have two outdrives.
These are coupled together at the tiller arms or
the drives themselves by a tie bar. Mercruiser
drives are set parallel and Volvo drives are toed
in 1/2” at the aft end of the cavitation plates to
provide maximum stability on straight ahead runs
and proper tracking through corners. Outdrive
or steering system damage may require the out-
drives to be realigned.
Please refer to the engine or steering system
owner’s manual or contact your dealer for infor-
mation on the power steering system.
2.6 Trim Tabs
The trim tabs (water interceptors) are mounted to
the hull on the transom below the swim platform.
The tabs themselves are the water interceptor
type. Instead of using a large trim tab surface
plane on each side of the transom to create up-
ward pressure and trim the hull, this system uses
a water interceptor on each side of the transom.
Each water interceptor is a small vertical blade
that is built into the actuator and extends control
the attitude of the hull. As the blade extends
it creates upward pressure on the hull bottom,
thereby raising the stern and trimming the hull.
A push button switch panel with an LED display
in the helm is used to control the trim tabs. The
switches are labeled and control bow up and down
movements. They also control starboard and port
up and down movements. Bow up and bow down
will control the hull planing attitude, while port
and starboard up and down provides control for
the hull listing. An indicator next to each switch
displays the position of your trim tabs. The display
indicates trim tab defl ection. When the indicator
is at the bottom of the display, the tabs are in the
Transom Activator (Volvo Water Interceptor)
Trim Tab Switch & Indicator