Vetus MT230 Instructions D'installation page 12

4 Filling and bleeding
The hydraulic system should be filled at the highest point, i.e. the
(top) steering pump.
Remove the filler cap from the (top) steering pump or oil expansion
tank. Fit a hose pillar* with funnel to the filler opening, or connect
the 'Quick Filler' system, available from Vetus.
*) MTP89
MTP151 and MTP191
Fill the steering head or expansion tank with hydraulic oil.
With dual operation system, remove the filler cap from the lower
steering head and refit as soon as oil comes out of the filler opening.
4.1 Steering System with 1 steering pump
2-1
Open air bleed nipple 'A' . Move the piston rod until the piston
reaches the end cover 'A' .
Now slowly turn the control wheel on the steering pump in
the direction shown. Stop turning as soon as the oil from bleed
nipple 'A' contains no more air. Close the bleed nipple. DO NOT
turn the control wheel in the opposite direction.
2-2
Open air bleed nipple 'B' . Turn the control wheel until the pis-
ton reaches the end cover 'B' .
2-3
Now slowly turn the control wheel in the direction shown.
Stop turning as soon as the oil from bleed nipple 'B' contains
no more air. Close the bleed nipple.
Fill the steering pump or oil expansion tank to the correct level.
The oil level should be checked often during the first few days after
filling to check the level and top up if necessary.
The oil level can fall as minute air bubbles escape.
10
020108.01
: G3/8
: G1/2
For the type of hydraulic oil, see 'Technical data' .
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 pre-
vent air being taken in with the oil.
1
Fit a length of hose, 8 mm. dia., to the air bleed nipples; open
the nipple by turning the hexagonal nut to the left.
4.2 Steering System with 2 steering pumps
3-1
Open air bleed nipple 'A' . Move the piston rod until the piston
reaches the end cover 'A' .
First, slowly turn the control wheel on the lower steering
pump in the direction shown. Stop turning as soon as oil from
bleed nipple 'A' does not contain any more air. Now, slowly
turn the upper steering pump control wheel in the direction
indicated.
Stop turning as soon as no air can be seen in the oil coming
from nipple 'A' . Close the air bleed nipple. DO NOT then turn
either of the control wheels in the opposite direction.
3-2
Open air bleed nipple 'B' . Turn the control wheel on the lower
steering pump until the piston reaches the end cover 'B' .
3-3
First, slowly turn the control wheel on the lower steering
pump in the direction shown. Stop turning as soon as oil from
bleed nipple 'B' does not contain any more air. Now, slowly
turn the upper steering pump control wheel in the direction
indicated.Stop turning as soon as no air can be seen in the oil
coming from nipple 'A' . Close the air bleed nipple.
Fill the top steering pump or oil expansion tank to the correct
level.
Air in the steering pump can be recognised by a gurgling noise when
the steering wheel is turned.
Hydraulic Steerings 230 - 1200 kgm