B&G Network Autopilot - Manual (Page 38)

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HYDAULIC DRIVE PUMP INSTALLATION
IMPORTANT NOTE: When dealing with any hydraulic system great
care must be taken to ensure that a high degree of cleanliness is
observed and no dirt, moisture or foreign objects are allowed to enter
the system. When bleeding your hydraulic steering system only use a
good quality ISO10 hydraulic oil e.g. Q8 DYNOBEAR or equivalent
(10cSt at 40
°
C).
1. Drain the steering system from the lowest point, usually at a cylinder
coupling.
2. Fit T-pieces into the port and starboard delivery lines, couple the
lines to the appropriate service ports of the pump using flexible
hydraulic hose.
3. Couple the reservoir port to the reservoir/balance line from the helm
units. A low pressure, transparent plastic tube can be used. Ensure
that this line rises gradually with no down turns.
4. Refill the steering system as recommended by the manufacturer,
using clean hydraulic fluid.
5. Fill the cylinder by temporally removing the cylinder couplings and
hoses at each end, refit the hoses securely.
6. Starting at the highest helm unit, fill the helm reservoir.
7. Slowly turn the steering wheel two turns to port and then to
starboard, checking the level of fluid in the helm unit reservoir at all
times.
8. Next turn the wheel fully in one direction until a slight pressure is felt,
continuously monitor the reservoir level.
9. Repeat in the opposite direction and continue in this manner until
topping up is no longer necessary.