Linear Drive Unit
Proceed as for rotary drive unit.
Check that at no point during movement of
the steering quadrant and linear drive
actuator from
to
does the
actuator foul any part of the quadrant,
steering mechanism or yachts structure. Any
fouling under load could damage the drive
actuator.
Check that the Drive actuator operates
horizontally
and that angular movement of
the ball end fitting is minimal
maximum).
Select
Duty
and rotate the
Rudder
control
several times to drive the rudder hardover.
When the rudder is driven
check
that the mechanical limit stop on the
vessel’s steering system is reached
before
the actuator reaches
its
mechanical limit.
When the rudder drives hard against the end
stop check there is no visible movement of
the actuator mounting pedestal or the
structure supporting it.
Rotate the
Rudder
control in the opposite
direction and repeat the checks with the
rudder driven
opposite
direction.
Hydraulic System
Proceed as for the rotary drive unit.
l
Check that all unions are tight and there is
no seepage of hydraulic fluid.
l
Select
Duty
and rotate the
Rudder
control
several times to drive the rudder hardover.
l
Rotate the
Rudder
control in the opposite
direction and drive the rudder
in
the opposite direction.
Check that the steering ram moves smoothly
and that there is no excessive play or
jerkiness in the movement.
The performance of the
5000 will
only reach the designed levels if the installation
of the actuator and steering system is correctly
engineered and adjusted. It is strongly advised
that these be checked
before
sea trials.
