This section is available on request - MAN Diesel & Turbo

MAN B&W 5.18
Hydraulic Power Unit for Alpha CP propeller
The servo oil tank unit, the Hydraulic Power Unit
for MAN Diesel’s Alpha CP propeller shown in Fig.
5.18.06, cons<strong>is</strong>ts of an oil tank with all other components
top mounted to facilitate installation at
yard.
Two electrically driven pumps draw oil from the oil
tank through a suction filter and deliver high pressure
oil to the proportional valve.
One of two pumps are in service during normal
operation, while the second will start up at powerful
manoeuvring.
A servo oil pressure adjusting valve ensures minimum
servo oil pressure at any time hereby minimizing
the electrical power consumption.
Fig. 5.18.06: Hydraulic Power Unit for MAN Diesel’s Alpha CP propeller, the servo oil tank unit
MAN B&W S70MC, S70MC-C/ME-C/ME-GI, L70MC-C/ME-C,
S60MC, S60MC-C/ME-C/ME-GI/ME-B, L60MC-C/ME-C,
S50MC, S50MC-C/ME-C/ME-B, S46MC-C/ME-B, S42MC,
S40MC-C/ME-B, S35MC, S35MC-C/ME-B, L35MC, S26MC
MAN Diesel
Page 5 of 8
Maximum system pressure <strong>is</strong> set on the safety
valve.
The return oil <strong>is</strong> led back to the tank via a thermostatic
valve, cooler and paper filter.
The servo oil unit <strong>is</strong> equipped with alarms according
to the Classification Society’s requirements
as well as necessary pressure and temperature
indicators.
If the servo oil unit cannot be located with maximum
oil level below the oil d<strong>is</strong>tribution ring, the
system must incorporate an extra, small drain
tank complete with pump, located at a suitable
level, below the oil d<strong>is</strong>tributor ring drain lines.
178 22 39�6.0
198 53 20�8.2