Vetus OB175 Instructions D'installation page 10

Assembling the Nylon Hose in the Connection
• Nylon tube (internal radius 8 mm (0.31"), external radius
12 mm (0.47"))
1 After cutting, screw the tube coupling sleeve onto the tubing
(left-handed thread), ending approximately 1.5 mm (0.06") in
front of the stop.
2 Oil the tube coupling and screw it into the sleeve.
Make sure that the internal sheathing of the tubing does not
follow while tightening the screw!
Also make sure that the internal sheathing of the tubing is not
squeezed while tightening the screw.
By changing the air bleed nipples from one side to another, it is
possible to install the nylon tube from every desired direction.
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Filling and Bleeding
The hydraulic system should be filled at the highest point of the
system, in other words, the (top) steering pump or the extra oil
expansion tank.
Take off the filler cap from the (top) steering pump or oil expan-
sion tank.
If necessary, use a hose pillar (G 3/8) with funnel or connect the
'Quick-Fill System' available from VETUS.
Fill the steering head of the expansion tank with hydraulic oil.
With double operation, take the fill cap of the bottom steering
head off temporarily, and put it back on as soon as oil comes
out of the fill opening.
See 'Technical Data' for oil specifications.
During filling, ensure that there is always sufficient oil in the
steering head or expansion tank; if the steering pump sucks in
air it will have to be bled again.
Fill the steering head or expansion tank slowly and carefully, to
prevent air being taken in at the same time.
Fit a length of 8 mm.
(0.31") diameter hose to
the air bleed nipples.
Open the nipples by turn-
ing one turn to the left.
Hydraulic Steering Systems OB175, OB300
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