Replacing 1525µ Plunger Seals and Plungers
60
4
Figure 4-3 Disassembled Plunger (1525µ Pump)
Inspecting the Plunger
After cleaning the plunger, inspect it for damage by holding it under a bright white light and
looking down its length for nicks and scratches. It is easier to see scratches under a bright
light than to feel them with your fingers.
•
If the plunger is not scratched or otherwise damaged, reassemble it with new seals.
Continue with
•
If the plunger is damaged, replace both the plunger and the seals. Continue with
.
Replacing the Plunger
1.
Reassemble the components of the plunger assembly (as shown in
).
2.
Lubricate the ball and seat with high-pressure grease. Make sure the brass seat is
located at the bottom of the piston.
3.
Reinstall the assembled plunger into the support assembly.
4.
Use the software to navigate to the Inlet Method window. Set the Flow parameter to
1.0
mL/min, click
Save
, then click
Load Method
to run the pump. When the piston is
fully retracted, click the
Stop Flow
button to stop the pump.
5.
With the indicator rod hole oriented to the left, reinstall the head support assembly
onto the pump. Alternately tighten the four screws. Do not overtighten.
Caution:
To avoid possible eye injury or cuts, handle the plunger with care. Wear safety
glasses. Pieces of a broken plunger are very sharp.
Caution:
To avoid possible eye injury or cuts, handle the plunger with care. Wear safety
glasses and use the plunger insertion tool. Pieces of a broken plunger are very sharp.
Plunger
Retainer Seal
Piston
Retainer
Ball Seat
Spring
Summary of Contents for 1525EF
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