1.2.3 HYDRAULIC DRIVE UNIT
The hydraulic drive unit consists of a precision
pump with integral valve block driven by a
continuously rated servo motor. A special
balance valve corrects the effects of
slip and isolates the pump from the
steering circuit when the autopilot is not
energised. The pump drive motor is connected
directly to the course computer which also
regulates peak pump pressure and eliminates the
need for end stroke limit switches.
'A
117mm
Supply voltage
Regulated peak pressure
Flow control
Peak flow rate (unloaded)
Maximum ram capacity
Power consumption
(typical average)
length ‘A’
volts (24 volts optional)
(30bar)
integral pilot check and
pressure balance valve
system
1
2-3.5 amps
(240mm)
12 volts (24 volts optional)
(30 bar)
integral pilot check and
pressure balance valve system
4-8 amps
(265mm)
