Hettich ROTINA 420, Repair Instructions

Page: 91 / 98

90/97
10.22 Pneumatic spring
The pneumatic springs (pg. 77, Fig. 2, item 5 ; pg. 78, Fig. 4, item 5) may be
dismounted only if the lid is open, i.e. if the pneumatic springs are not under
tension.
•
Open the lid.
•
Switch off the mains switch and disconnect the centrifuge from the mains supply.
•
Remove the two covers (Fig. 14, a) at the rear panel of the centrifuge.
•
Hold the lid with the hand and loosen the stop spring of the connecting pin at the lid.
•
Press the opened lid slightly to the back in order to relieve the connecting pin and
take out the connecting pin.
Hold the lid with your hand as the force of one gas spring is not sufficient to
keep the lid open!
•
Unscrew the piston rod (Fig. 14, b) of the pneumatic spring with pliers in a counter
clockwise direction.
•
Remove the pneumatic spring.
•
To mount the pneumatic spring, carry out these steps in opposite order.
Fig. 14
a
b