Agilent Technologies SD-1 User Manual page 93

Removing the old piston assembly
1 Insert a 3/16 inch T-handle wrench into one of the screw holes in the 3
2 The mounting screw is a tight fit. Turn the wrench a small amount
Damage of pump piston
C A U T I O N
If the pump piston is unsupported, the weight of the pump head could break the piston.
➔
3 Hold the pump head and repeat steps 1 and 2 on the other mounting screw.
4 Carefully slide the pump head straight out from the pump until it clears the
5 Remove the backing disk from the old piston assembly.
SD-1 Solvent Delivery - User Manual
o'clock and 9 o'clock positions at the front plate of the pump head.
a Turn the wrench gently until you feel it engage the socket in the
mounting screw.
Figure 42 Location of the pump head mounting screws
counter-clockwise to begin loosening the mounting screw.
Support the weight of the pump head body as you remove the mounting screws.
The mounting screws will remain captive behind the front plate.
piston. Do not apply any sideways or up and down pressure to the piston
while removing the pump head.
The pump head with washing section is separated from the piston
assembly. The old seals and old o-ring generally remain on the washing
section.
Maintenance and Repair
Replacing Piston
8
93