HP 5890 SERIES II Service Manual page 31

Handle the heater and sensor cartridges with care to prevent breakage. The cartridges
(particularly the smaller sensor cartridge) are fragile.
23. Carefully slide the heater and sensor cartridges
out of the heated block portion of the inlet.
Use caution to avoid sharp bends when
bending tubing. Sharp bends may crimp the
tubing.
24. Remove any insulation from the shell weldment.
25. Remove the liner from the shell weldment.
26. If the inlet is to be replaced, prepare the re-
placement inlet by pre- bending its tubing into
orientations similar to that of the removed inlet.
27. Install the liner in the shell weldment.
28. Install any removed insulation which wraps
around the tube in the shell weldment.
30. Slide the heater and sensor cartridges into the
heated block of the inlet being installed.
31. Install the heated block onto the stem of the
shell weldment.
32. Install the retaining nut on the base of the shell weldment securing the heated block to the shell
weldment.
33. Install any removed insulation around the heated block (within the cavity provided in the shell
weldment).
34. Carefully install the inlet, securing it to the instrument with two Pozidriv screws.
To lessen the possibility of pressure leaks, always install a new anealed seal, when the old seal
has been removed.
35. Tighten the retaining nut at the base of the shell weldment.
36. Install the reducing nut, flat washer, and anealed seal onto the base of the retaining nut.
37. Install the lower insulation cover and three pieces of lower insulation, inside the column oven.
38. Tighten the two screws which secure the lower insulation cover inside the column oven.
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HEATER/SENSOR
CABLE ASSEMBLY
HEATED
BLOCK
RETAINING
NUT
NOTE
SVC 2- 10
LINER
SHELL
WELDMENT