9 of 10
Jun 2001
Valves
Agilent 6890 Gas Chromatograph Service Manual
Valve Box 1120
Removing the valve box assembly
7. Remove the two Torx T-20 screws securing the valve box top assembly to
the standoffs. Lift the valve box top assembly straight off the valve box.
Be careful not to move the valve rotor index pin from its “at rest” position.
Note If valve/actuator alignment is to be made, see Valve/Actuator Alignment in
this section.
8. To reassemble: Align the two mounting holes in the valve box top
assembly with the standoffs in the valve box. Lower the box top assembly
until it rests on the standoffs.
9. Secure the valve box top assembly with two Torx T-20 mounting screws.
Tighten these screws firmly. Reinstall hardware for variable restrictors
if present.
10. Exercise the valve(s) on and off a few times to verify operation.
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