MAX Power VIP250-HYD - Manual (Page 10)

VIP 250, Hydraulic with Electronic Controller 25/12/2005
10
4. HYDRAULIC POWER SYSTEM INSTALLATION
The hydraulic power equipment, such as the oil reservoir/filter, pump and
directional control valve, should be installed in compliance with the usual rules of
accessibility to enable periodic checks and maintenance.
Remember that:
(1) The oil tank must gravity feed to the pump.
(2) The directional control valve must be fitted as close as is convenient to the
thruster unit, in order to verify the hydraulic pressure gauge.
All hydraulic high pressure power circuit piping must comply with high pressure
standards (Flexible hose – HP SAE 100 R8 or R9), and have a diameter at least
equal to that recommended in order to reduce head loss especially when the
installation’s layout requires long hose lines. These hoses or pipes should
preferably have 1/2″ interior diameter.
No hose, pipe or fitting in the power circuit should ever have an interior diameter
less than 3/8″.
All power circuit piping must have a service pressure rating of at least 250 bar,
with a rupture pressure rating of 500 bar.
Fittings must be of good quality and crimped as per manufacturers instructions,
and pressure tested to at least 400 bar.
All pipes and hoses must be absolutely clean when connected to the circuit!
The pump intake hose line (from the reservoir) must be of a quality that is not
subjected to pinching or crimping due either to vacuum, to an excessively small
radius of curvature, or to variations of temperature.
This hose or pipe should always be shorter than 2 meters and preferably have 1″
interior diameter but not less than 3/4″ID
MAX POWER recommends the use of ISO GRADE 15 to 32 hydraulic oils for the hydraulic
power circuit. Max Power has already used this oil during the run in tests and consequently the
Thrusters motor and piping are already filled with such.
CAUTION: Biodegradable and mineral (commonly used) oils are non-compatible and should
not be mixed or used together. Mixing them will deteriorate certain hydraulic elements. If you
intend to use biodegradable oil, thoroughly flush the existing mineral oil from the unit first with
the appropriate oil.