Servicing the column tube
assembly
Disassembling the column tube assembly
This procedure assumes that the top plate and adapter (see Removing the top plate and
adapter, on page 49), and the bottom plate assembly (see Servicing the stainless steel
bottom bed support, on page 117 or Servicing the plastic bottom bed support, on page 131),
have been removed from the column.
1
Remove the column tube assembly [B] from the pivot stand.
2
Turn the column tube assembly upside down and carefully rest the column on the
top bayonet [804].
NOTICE
Place the column tube on a stable surface and take care not
to knock over the column while working with it.
3
Use a socket wrench to undo and remove the nuts [806] and washers [119] connected
to the tie bars underneath the bottom flange [805]. Carefully remove the bottom
flange.
4
Unscrew 1-2 tie bars (see Replacing tie bars, on page 139).
5
Carefully remove the column tube [201].
6
Check the O-ring [114a] and [114b] in the bottom flange and top bayonet for visible
signs of damage. Replace if necessary:
a
Use a plastic implement or the removal tool to remove the O-rings from the
groove.
NOTICE
Avoid scratching or in any other way damaging the flange.
b
Check the tube supports [115a] and [115b] for signs of damage. If necessary
replace the tube support.
c
Fit in a new O-ring in the groove in the top and bottom, making sure to press it
in to the groove at all points along its circumference.
136
AxiChrom 50, 70 and 100 columns Operating instructions 28-9331-08 AG
6 Maintenance and service
6.2 Performing maintenance and service
