Vetus MTC100Z Instrucciones De Instalación página 6

Introduction
This cylinder is suitable for steering an outboard engine or
Z-Drive.
A hydraulic steering system consists basically of one or more
pumps and a cylinder, see Diagrams '1' and '2' *.
The pump HTPxx10R is fitted with a non-return valve. This pre-
vents any feel of rudder pressure at the steering wheel.
The pump is also fitted with a pressure-relief valve.
With a hydraulic steering system with two pumps, the non-
return valve also ensures that one pump can take over from
the other automatically, as well as preventing the running of the
unused steering pump. See Diagrams '1' and '2' *.
Fitting
During assembly, avoid any welding or paint splashes or dam-
age to the steering pump spindle and the piston rod. These
could damage the oil-control rings causing oil leaks.
Cylinder
In order to ensure proper bleeding, the air-bleed nipples should
point upwards.
Provisions should be taken to protect the piston rod against
damp, dirt and sea water.
The tilt tube (2) has already been fitted.
Lubricate the thread of the nut provided (1).
Insert the rod (3) through the tilt tube (2) and screw the cylinder
on the tilt tube.
Steering pump
Assemble the steering pump as is shown in the manual pro-
vided.
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In a hydraulic system with three pumps (2 manual pumps and 1
EHP) the non-return valves are essential for the reasons above;
see Diagrams '3' and '4' *.
The EHP type 'R' is already equipped with a built-in check
valve.
Following the recommendations below will result in a longer life
and better performance of your hydraulic steering system.
• Only use the type of hydraulic oil as specified in the
Technical Data.
• Carry out regular maintenance.
*) See 'Hydraulic Diagrams' on page 26-27 for the various
connection diagrams.
Oil Expansion Tank
A part of the manual steering pump should serve as an oil
expansion tank. The expansion space required depends on the
quantity of oil in the steering system and the expected minimum
and maximum ambient temperatures.
If the expansion space is too small, oil will escape via the air
relief hole in the filler cap of the top steering pump.
So, install an extra oil expansion tank*) when:
- A steering system consists of two manual steering pumps
and an electro-hydraulic pump.
- The total length of the piping is very large.
- Very considerable temperature changes are expected during
operation.
- An extra oil expansion tank is also recommended if it is
expected that the boat will undergo violent movement during
operation.
Furthermore, an extra oil expansion tank simplifies filling the
system and checking the oil level.
Fit the oil expansion tank above the (top) steering pump.
Seal closed the air relief hole in the filler cap of the top steering
pump.
*) Vetus art. code: HTANK
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Hydraulic Cylinder for Outboard Steering and Z-Drive