Motor/Pump - Nilfisk-ALTO NEPTUNE 4 FA Service Manual

Fig.D.4: Motor/pump
A: Stator.
B: Rotor.
C: Wobble disc.
D: Ceramic piston.
The three ceramic pistons "D" are driven by a wobble disc "C", the mission of which is to transform
the rotating power from the rotor "B" into the reciprocating pumping pistons "D". The angle of the
wobble disc "C" decides the volume of water which is sucked through the suction valves "E" and
pressed out through the pressure valves "F".
The inlet "I" and the outlet "J" are connected directly to the By-pass valve "G".
The water volume can be adjusted by the regulation valve "H".
NEPTUNE 4 FA_EN_Ver.2.0_ 22/11
B
A
Function
C
E: Suction valve.
F: Pressure valve.
G: BY-pass housing
H: Water regulation valve
D
E
F
D
H
G
J
I
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