84
Agilent 7820 GC Service
Trace the wires from the valve to the extension cable connector.
Disconnect them.
Loosen the screw holding the clamp and slide the old valve out.
Examine the new valve. The plastic part has a flat side with 3
small O-rings. These must be placed over the 3 holes in the
piece to which the screw connects.
Slide the new valve into position (flat side against the metal) and
place the clamp over it.
Align the flat end of the valve with the flat metal surface next to it.
Adjust the valve position until it lies flat against the adjacent
metal.
Tighten the clamp screw. There should be no gap between the
plastic and the metal. If there is, loosen the clamp screw and
repeat the adjustment.
Reconnect the wires.
Restore the covers.
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