Hitachi CHROMASTER 5160 Instruction Manual page 153

(6) Attach the check valve (suction and discharge valve) to the
Pump head. Turn the head about 375 degrees with the
wrench 10. To prevent biting, apply distilled water to the
whole male thread of the valve when tightening.
Check valve
(Discharge side)
Check valve
(Suction side)
(7) Loosen the valve with the wrench 10. Make sure the valve
can be removed with only hand (without any tool) after
loosening. Attach the valve again as in (6) above.
(8) After 12 hours or more from attaching the valve, tighten the
valve with the wrench 10 by about 30 degrees.
(9) Install the inlet tube and outlet pipe (1) in the reverse order
of their removal. With the drain valve open, start the pump
to fill the pump head and tube with the mobile phase and to
expel bubbles from the lines and the pump head.
(10) Connect a column and run the pump to make sure the
pressure is stable.
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