TECHNICAL INFORMATION
10
W-GV4 Scalino outdoor — April 2017 — EN
OIL VISCOSITY
We recommend multi grade oil 10W40. Cold or hot conditions
a special grade could be applied according to the Viscosity Chart
below:
Figure 5: Viscosity chart
It is very important to select the right viscosity. Especially in
cold conditions the viscosity of the oil should be low (so the oil
should be “thinner”) to keep the oil pressure in the cooling
system within acceptable limits.
OIL CAPACITY
The content of the crankcase should be:
excluding heat exchanger and piping: 2 litres
including heat exchanger and 2 m piping: 2.9 litres
Do not overfill with lubricating oil as this may have a
detrimental effect on engine performance.
Refer to the maintenance chapter (Ch.5) for details.
LUBRICATING OIL PRESSURE
Minimum at idle:
49 kPa (0,5 kgf/cm
2
- 7psi)
Normal at 3000 rpm:
147 .. 490 kPa (1,5 .. 5 kgf/cm
2
- 21 .. 71 psi)
Minimum at 3000 rpm:
98 kPa (1,0 kgf/cm
2
- 14 psi)
COOLING OIL PRESSURE
Minimum at idle:
149 kPa (1.5 kgf/cm
2
-21 psi)
Normal at 3000 rpm (80°C):
180 .. 220 kPa (1,8 .. 2.2 kgf/cm
2
– 25 .. 35 psi)
Maximum cooling oil pressure is protected by an
overpressure switch that will trip at 550 kPa (5.5
kgf/cm
2
– 80 psi).
In cold condition the pressure can be higher, but the
alarm will be suppressed.
COOLING OIL TEMPERATURE
Maximum oil cooling temperature 120°C (oil out to
the cooler).
Minimum oil temperature 70°C.
Sump oil temperature should be between 80°C and
90°C for optimal performance
3.1.9
Oil cooling heat exchanger
The W-GV4 Scalino engine is cooled by oil and not by cooling
liquid. The oil cooled heat exchanger of the W-GV4 Scalino is
not ventilated. The system is ventilated by the engine itself and
no expansion tank is applied.
When it is not possible to drain the oil from the heat exchanger
every time the oil is changed, one should pump out the engine
oil from the engine sump as well as possible and increase the oil
change frequency to once every 200 running hours.
A dedicated interval recommendation can be provided for
special applications by WhisperPower.
