Hach-Lange SIGMA SD900 Refrigerated Sampler and All Weather Refrigerated Sampler User Manual - Manual (Page 81)

79
Maintenance
6.3.3 Rotor removal and cleaning
For an entire pump assembly replacement, order part number 6262000.
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 76 ).
2. Open the rubber flap on the end of the rotor and remove the
screw with a flat-blade screwdriver ( Figure 35 ).
3. Remove the rotor. A collet connects the rotor to the pump shaft
and can come off when the rotor is removed ( Figure 35 ).
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 35 ).
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 76 ) .
Figure 35 Pump rotor removal
1 Shaft 5 Rotor
2 Collet recess 6 Collet
3 Rubber flap 7 Tang
4 Screw