Hach-Lange Sigma SD900 Portable - Manual (Page 62)

60
Maintenance
6.3.3 Rotor removal and cleaning
Remove the pump rotor to thoroughly clean the silicone residue
from the pump tube.
Procedure:
1. Remove the pump tube (see section 6.3.2 on page 58 ).
2. Open the rubber flap on the end of the rotor and remove the
screw with a flat-blade screwdriver ( Figure 24 ).
3. Remove the rotor. A collet connects the rotor to the pump shaft
and can come off when the rotor is removed ( Figure 24 ).
4. Clean the rotor, pump tube tracks and pump housing with a
mild detergent.
5. If the collect was removed in step 3 , align the recess in the
collet with the tang on the shaft and push the collet on the shaft
(
Figure 24 ).
6. Push the rotor on the shaft and secure with the screw. Do not
overtighten the screw. Close the rubber flap on the rotor.
7. Install the pump tube ( section 6.3.2 on page 58 ).
Figure 23 Pump tube installed
1 Pump tube to sampler tube fitting 2 Pump tube to liquid sensor