Nilfisk-ALTO NEPTUNE 5-46 PE, Service Manual

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NEPTUNE PE-DE_en_Ver.1.0_October 2010
Function
NEPTUNE PE/DE—NP5 PUMP
The 3piston radial pump NP5 is used in the NEPTUNE 5-85PE and 5-51DE
OUT
IN
Suction valve
Pressure valve
OIL
Cam shaft
Shaft
The three pistons are driven by the motor via a belt drive. The cam shaft transforms the
rotation power into the pistons reciprocating movements.
The movement and the diameter of the pistons decide the water volume which can be
sucked into the suction valves and pressed out through the pressure valves.
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