Adjustment Of By-Pass System - Nilfisk-ALTO NEPTUNE 4 FA Service Manual

Adjustment of by-pass system.

Fig.G.09: Pressure gauge
Connect test pressure gauge 1206358 to the
machine water outlet.
Fig.G.11: Safety valve
Check the working pressure in data sheets
chapter B.
Close the safety valve completely.
NEPTUNE 4 FA_EN_Ver.2.0_ 22/11
Adjustment / Test
A
Fig.G.10: Test tap
Machines with hose reel:
Connect extension hose 301001311and test
pressure gauge 1206358 to the machine water
outlet
Fig.G.12: Pressure bolt
Turn pressure bolt (B . Fig. G12) 1 to 2 turns
out, to ensure that a too high cut off pressure
will not damage the by-pass valve.
Adjust the test tap (A. Fig G.09 & G.10) and
the pressure bolt (B) so it couples 20-30 bars
higher than working pressure, when the pres-
sure gun is closed— CUT OFF PRESSURE.
After the cut off pressure is reached the ma-
chine runs in by-pass untill the pressure gun is
opened.
G
B
48