Waters 1525M - Exposed Head Support Assembly (1525Μ Pump)

Maintaining the 1525 Pump 59
4
Removing the Plunger
1. Remove the pump head as described in Section 4.3.1, Preparing for Plunger Seal
Replacement.
2. Remove the four head support screws with the 9/64-inch Allen wrench (Figure 4-2
),
then carefully slide the head support assembly and the indicator rod off the pump.
Set the head support assembly on the benchtop.
Figure 4-2 Exposed Head Support Assembly (1525µ Pump)
3. Use the software to navigate to the Inlet Method window. Set the Flow parameter to
0.3 mL/min, click Save, then click Load Method to run the pump. When the plunger
is fully extended, click the Stop Flow button to stop the pump.
4. Remove the plunger by sliding it out of the back of the support assembly. Set the
support assembly aside. Continue with “
Cleaning the Plunger”.
Cleaning the Plunger
Clean the plunger by sonicating it in 50:50 methanol/water for a few minutes. The parts of
the plunger assembly are shown in Figure 4-3
. Continue with “Inspecting the Plunger”.
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.
Caution:
To avoid possible eye injury or cuts, handle the plunger with care. Wear safety
glasses. Pieces of a broken plunger are very sharp.
Head Support Screws
Head Support Assembly