Sperry Marine 5016-CA, Руководство по эксплуатации, установке и обслуживанию

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056376/A Analogue Compass Repeaters
5-4 Bearing Repeater
Installing Bearing Repeater with Bearing Bracket
The bearing repeater bracket, type 4890, is typically fitted to a bulwark
or other vertical surface parallel or perpendicular to the vessel’s fore-
and-aft line. The position of the bearing bracket(s) is to be chosen that
the vessel’s superstructure does not unduly obstruct the view of the
horizon when bearings are taken. In case one bearing bracket does not
allow take bearings in a full circle of 360°, a second bearing bracket must
be installed for compensation.
The shipyard is to provide the mounting surface with four M 10 bolts or
welded studs, to which the bracket is then attached with nuts and wash-
ers. The mounting surface should be as exactly parallel or perpendicular
to the fore-and-aft line as possible, as the mounting method permits to
correct only a small amount of misalignment.
To install the bearing repeater bracket and repeater:
1. Check that the mounting facilities provided by the shipyard match
with the specifications given in dimension drawing 4890-0112-03.
2. Check that easy access is provided to the connection box at the right
hand side of the bracket. If necessary, unmount the box and fit it to
the bracket’s left hand side or directly onto the bulwark.
3. Screw a thin M 10 nut onto each of the four mounting studs.
Leave a few threads exposed between the nuts and the mounting
surface to allow for fine-adjustment of the nuts’ positions later
4. Put a flat washer onto each nut.
5. Fasten the bearing repeater bracket to the attachment studs with
four thin nuts and washers. Tighten the nuts only lightly.
6. Loosen one of the lock nuts securing the trunnions in the gimbal ring
and screw back the trunnion by approximately 2 cm.
7. Hold the repeater in a convenient position close to the bracket.
Unwind the repeater connection cable and run it through the gimbal
ring from above.
8. Lift the bearing repeater into the gimbal ring so that the lubber line
points in the forward direction.
CAUTION Risk of wrong installation
Wrong positioning of the bearing stand will obstruct to take bearings.
Always make sure that the bearing stand is so positioned that the ves-
sel’s superstructure does not unduly obstruct the view of the horizon.
In case one bearing stand does not allow to take bearings in a full circle
of 360°, a second bearing stand must be installed for compensation.
CAUTION Risk of damage
The bearing repeater is a heavy instrument.
To avoid any damage during installation of the bearing repeater into the
gimbal ring, the installation should be carried out by two service persons.
Note The installation of the repeater in the gimbal ring should be carried out
by two service persons.