B&G H1000 Autopilot - Manual (Page 20)

h1000 pilot
description/installation
Page 19
ram drive unit installation
Note: General consideration must be given to the steering system and its geometry before starting
the installation. Many factors must be contemplated for a practical solution; the information
given here is for guidance only, although where a maximum or minimum value is given this
must be adhered to. It is essential that the unit be installed in a fully functional steering
system, with no backlash or stiffness when operating. Rectify any steering problems before
installation of the ram drive unit or the autopilot will not function correctly.
key points on installation
x Check that the steering gear is in good condition. Rectify any steering defects prior to installation
of the ram.
x The ram drive unit must be secured onto a flat, rigid base. It maybe necessary to construct a
platform section for the mounting plate. For angled rudderstocks, an angled platform section will
have to be constructed.
x All setting-up and aligning of the ram drive unit with the steering system should be carried out
with the rudder in the amidships position and the ram arm at the centre point of its travel.
x The angle between the ram arm and the tiller arm should be as shown in the following diagrams.
x The ram arm should ideally be at right angles to the rudderstock. The ball-joint on the end of the
ram arm will allow a MAXIMUM of ±9
q of vertical misalignment.
Caution: For Type 3 Ram Reservoir Installation, do not turn the black reservoir tap on or attempt to
move the piston rod until all of the following are completed:
x The base foot of the ram and pump has been bolted into position.
x The reservoir has been fixed to a bulkhead above the ram and pump.
x The sealed reservoir transit cap has been replaced by the breather cap supplied.
x The reservoir has been filled with the oil supplied.
When the checks listed above have been verified, the reservoir tap can be switched to the ‘‘ON’ position
allowing the oil to flow between the reservoir and the pipe. (Tap “ON” position is in-line with the pipe).