Hach-Lange SIGMA SD900 Refrigerated Sampler and All Weather Refrigerated Sampler User Manual - Manual (Page 80)

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Maintenance
Figure 33 Pump tubing installation
1 Pump tube guide 5 Rotor
2 Pump tube track (upper) 6 Pump tube track (lower)
3 Guide pin 7 Connection to liquid sensor
4 Alignment dot
Figure 34 Pump tube installed
1 Refrigerated sampler 3 Pump tube to refrigerator fitting
2 Pump tube to liquid sensor 4 All weather refrigerated sampler