Agilent Technologies 1260 Infinity - Page 161

1260 Infinity Binary Pump User Manual 161
Maintenance
10
Maintenance of a Pump Head without Seal Wash
3
Check the piston surface and remove any deposits or
layers. Most suitable is polishing of the piston rod with
toothpaste. Replace the piston if scratched or if dents are
visible.
NOTE
The best way to inspect a piston is to hold it up and
watch e.g. a light bulb through the piston rod. The
transparent sapphire acts as a very strong magnifier and
even smallest surface abnormalities become visible.
4 Using the steel side of the insert tool carefully remove
the seal from the pump housing. Remove wear retainers,
if still present.
5 Using the plastic side of the insert tool insert the new
seals into the pump head and press them firmly in
position.
6 Place a seal wash gasket in the recess of the support
ring. Put the seal holder on top of the gasket.
Piston surface
Insert tool
Piston seal
Pump housing
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Seal holder
Gasket
Support ring