128 1100 Series Nano Pump Service Manual
3 Repairing the Pump
4 Slide the pump head assembly onto the pump drive. 
Apply a small amount of pump head grease to the 
pumphead screws and the balls of the spindle drive. 
Tighten screws stepwise with increasing torque.
5 Reconnect the capillaries, tubing and the active inlet 
valve cable to the connector.
Balls of
spindle drive
Pump head 
screws
AIV connector
Inlet tube
Adapter
capillary
Active inlet valve