Removing The Pump Head - LC Packings SWITCHOS II User Manual

6.3.3 Removing the Pump Head

To remove the Pump Head:
a) Remove the inlet and the connecting capillary (FIGURE 6-4).
FIGURE 6-4. Disassembly of the Pump Head
b) Loosen two diagonally opposed screws (e.g. screws '2' and '4' in FIGURE 6-
4 by a quarter turn at a time and remove the screws.
c) Carefully loosen the two remaining screws (e.g. screws '3' and '5' in FIGURE
6-4), alternating from one to the other, approximately half a turn at a time
and remove the screws.
d) Remove the pump head.
Note: If the purpose of removing the pump head is to check the piston rods,
there is no need to disassemble the pump head any further. Pull out each piston
rod in a straight line using a pair of pliers.
To replace the Pump Head:
a) Position the pump head onto the housing and carefully line up the screw
holes. Tighten all four set screws by hand.
b) Alternating from one to the next, tighten two diagonally opposed screws
(e.g. screws '2' and '3') half a turn at a time until the pump head is correctly
seated onto the housing.
c) Tighten the two other screws.
d) Check that the screws that were tightened in step c) are well tightened.
User's Manual Switchos II
Maintenance and Troubleshooting
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D850R3
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