Exchanging The Proportional Valve - Agilent Technologies 1260 Service Manual

8
Repairs
Overview of Internal Parts

Exchanging the Proportional Valve

When Valve not switching correctly or leaking
Tools required p/n
8710-0899
Parts required #
1
1 Remove Top Cover, see
2 Disconnect the valve connector from the control board (CN8) (for
3 Loosen and remove the holding screws of the valve.
4 Loosen and remove the two screws of the holding plate at the valve.
5 Disconnect inlet and outlet tubes from the valve.
6 Fix the holding plate to the new valve.
7 Connect the two vacuum tubes to the valve. The inlet of the valve is
8 Fix the valve with the two screws to its holder.
9 Connect the valve cable to the control board (CN8).
72
Description
Screwdriver, Pozidriv #1
p/n
G1379-60003
page 55.
identifying internal parts see
labeled IN and is connected to the vacuum pump.
Description
Proportional valve
"Removing and Refitting the Top Cover"
"Overview of Internal Parts"
1260 Infinity Micro Degasser Service Manual
on
on page 66).