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6 Install the new valve to needle tubing assembly by clipping it in to the holder
in the z-arm assembly (1.), and sliding it through the hole in the z-arm (2.)
and out on the bottom of the needle carrier assembly (top to bottom).
7 Using the 4 mm wrench and the 5/16“ wrench for counter-holding, connect
the valve to needle tubing to the needle.
8 After fixing the screw, clip the tubing into the guide on the bottom of the
needle carrier assembly.