Changing The 1 Ml Piston Noses - Gilson 402 User Manual

Maintenance
Part Number Description
F4015065
F4015005
6-10
Before Mounting a 500 µL Syringe: To optimize
Cover seal
the fitting of the 500 µL syringe on the Dilutor
valve, the 500 µL syringe is supplied with a cover
Valve screw
seal. The orientation of this seal must be respected
to ensure that the connection with the syringe is
airtight. (See the opposite figure).
Syringe body

Changing the 1 mL Piston Noses

You need the special tool for mounting the piston
nose on the 1 mL piston. The nose push-fits onto
the piston shaft.
1. Remove the syringe from the pump as described
2. Slide the piston out of the syringe barrel.
5 x 1 mL piston
noses and
3. Remove the piston nose from the piston rod by
mounting tool.
1 nose mounting
tool.
4. Remove any remaining debris of the original
5. Put the new piston nose in its recess in the
6. Turn the tool upside down and place the piston
7. Press the piston shaft firmly into the piston nose
8. Slacken the piston button Allen screw and
Piston rod
9. Remove the tool from the piston assembly.
10. Dip the piston nose in distilled water and slide
11. Hold the syringe upright with the threaded end
12. Slide the piston button against the body of the
Piston nose
13. Slide the piston up and down in the syringe five
Piston nose
holding tool
14. Remount the syringe on the pump as described
page 6-4.
carefully pinching the piston nose with a pair of
cutters and gently pulling the piston nose off the
piston rod. Take care not to damage the end of
the piston rod when removing the piston nose.
nose from the end of the piston rod.
piston nose holding tool.
assembly.
holding tool. A slight rotation of the piston shaft
ensures a correct fitting.
remove the piston button from the piston rod.
the piston into the syringe.
of the syringe resting on a flat, clean surface.
Slide the piston into the syringe until the piston
stops (the nose is level with the end of the syringe).
syringe and tighten the Allen screw that secures
the piston button onto the piston rod.
or six times to ensure a smooth operation be-
tween the piston and syringe.
page 6-4.
6