Steering And Rudder System; Rudder Shaft Stuffing Box; Trim Tab System - Back Cove Yachts Back Cove 30 Owner's Manual

"double set screw", i.e. there is a set screw under the
set screw.
Shaft seals must be "burped" after launching and
before operating the engines. When launching
the boat, a bubble of air can be trapped in the
shaft seal. This bubble of air can interfere with
the proper cooling of the shaft seal.
It is normal for a small amount of graphite spin off to
show at the graphite and stainless steel ring. The
boat is equipped with a seal guard (see Fig_6.12a-2)
to minimize the effect of this.
7.8 Steering, Maneuvering and Trim
The steering system on the Back Cove 30 is helm
pump driven, hydraulic. The captain should be fully
acquainted with the information contained in the
product literature provided
manufacturer as correctly functioning steering is
critical to the safe operation of the boat. Make certain
during initial commissioning that the system is well
bled and free of trapped air. This will improve both
the feel and the response of the steering system.
Note:
If auto pilot is installed, make sure system is bleed.
A. Steering and Rudder System
The reservoir for the helm pump is within the helm
itself. The helm drives a hydraulic cylinder (see
Fig_6.7-1 and Fig_6.7-3) which operates under
pressure in both directions. There is no pressure in
the system unless the helm is being rotated. This
minimizes the likelihood of leaks developing.
(Fig_6.7-1)
B. Rudder Shaft Stuffing Box
The rudder shaft stuffing box effectively guards
against the excessive intrusion of water. The packing
nut can be tightened to reduce leaking, but it is
by the steering
expected that there may be a "drip" of water at the
nut during operation. (see Fig_6.7-1)
Do not over-tighten the rudder stuffing box
packing nut! An over-tightened nut can result in
loss of hard steering, loss of steering control and
excessive rudder stock wear.
C. Trim Tab System
(Fig_6.7-8)
The trim tabs (see Fig_6.7-8) are electrically actuated
plates. They are designed to optimize the attitude of
the boat at the normal range of operating speeds and
to compensate for variation in sea state, gear
stowage and propeller torque.
It is very important not to operate the boat "Bow
Down" at high speeds to avoid loss of steering
control.
(Fig_6.7-9)
Controls are located on the helm pod (see Fig_6.7-9
and Fig_6.11-1). The left-hand switch operates the
starboard tab and the right hand switch, the port tab.
Periodic visual inspection of the trim tabs should be
enough to keep the system running properly.
Tabs fully retract when the breaker is switched
"OFF".