Hitachi CHROMASTER 5160 Instruction Manual page 333

NOTE: If the suction or discharge valve on the side of
pump head (1) is dry, the mobile phase may not
be sucked in the early stage after pump start.
In this case, aspirate the mobile phase into the
furnished syringe and discharge the mobile phase
from the suction valve to the discharge valve side.
Fig. 3-4 Pump Front
3 - 51
3.6.1
Discharge
valve
Suction
valve
Syringe