To Install The Upper Valve Box - Agilent Technologies 8860 Maintaining

15 Maintaining a Valve

To Install the Upper Valve Box

To Install the Upper Valve Box

1 Gather the following:
2 Verify that all valve rotors are in the full counterclockwise position (valve Off).
3 For each actuator that mates with a newly installed valve:
Rotor adjustment shaft
4 Locate the two half-moon cutouts at the bottom back of the upper valve box. Place the
5 Push each coupling/shaft assembly downward with a flathead screwdriver until the slot on
6 For each newly installed valve:
7 Install the detector cover.
8 Restore normal operating condition.
Maintaining Your GC
• T-20 Torx screwdriver
• 3-mm hex key wrench
• Flathead screwdriver
a Loosen the adjustment set screw.
b Locate the rotor adjustment shaft on top of the actuator. Use a screwdriver to rotate
the valve rotor counterclockwise until it stops.
upper valve box on top of the lower valve assembly, routing the heater/sensor wires
through the cutouts. Secure with two T-20 mounting screws.
the coupling engages the rotor index pin.
If the coupling and valve do not engage, check that both are fully counterclockwise and
try again. If necessary, turn the shaft slightly to engage the coupling.
a Using a flathead screwdriver, turn the rotor adjustment shaft counterclockwise until it
stops, then back it off a small amount (< 1 mm) to set one end of the rotor's motion.
b Tighten the adjustment set screw.
Rotor adjustment
slotted shaft
Adjustment set screw
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