Maintenance
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8.4.3 Adjusting the tyre pressure
8.4.3.1 Dunlop valve
The tyre pressure cannot be measured on the simple 
Dunlop valve. The tyre pressure is therefore measured 
in the filling hose when pumping slowly with the bicycle 
pump.
Figure 67: Dunlop valve with union nut  (1) and rim nut  (2)
 It is recommendable to use a bicycle pump with a 
pressure gauge. The operating instructions for the 
bicycle pump must be adhered to.
 Unscrew and remove the valve cap.
 Connect the bicycle pump.
 Pump up the tyre slowly and pay attention to the 
tyre pressure in the process.
 The tyre pressure has been adjusted as per the 
data [ Data sheet, page 1].
 If the tyre pressure is too high, unfasten the union 
nut, let off air and tighten the union nut again.
 Remove the bicycle pump.
 Screw the valve cap tight.
 Screw the rim nut gently against the rim with the 
tips of your fingers.
EN_034-11592_1.0_0.01_19.08.2018_HERCULES BOSCH Purion MY19_Inhalt.book  Seite 146  Montag, 19. November 2018  11:00 11