Removing And Replacing The 1525Μ Plunger Seal; Unscrewing Pump Head Mounting Screws (1525Μ Pump) - Waters 1525M Installation And Maintenance Manual

Figure 4-1 Unscrewing Pump Head Mounting Screws (1525µ Pump)
9. Carefully slide the pump head assembly off the pump.
Attention:
STOP
4.3.2 Removing and Replacing the 1525µ Plunger Seal
1. Remove the plunger bearing from the pump head.
2. Remove the seal from the pump head using the seal extraction tool. (Twist the
tapered screw end of the tool clockwise into the seal, then pull the seal to remove it
from the pump head. Do not reuse the seal.)
3. Place the new plunger seal onto the tip of the seal insertion tool. Make sure the
spring in the seal is facing away from the end of the tool (you should be able to see
the seal spring at the tip of the tool).
4. Moisten the seal with methanol.
5. Place the small end of the block part of the seal insertion tool into the pump head.
Slide the tip of the tool (with the seal on it) through the block and into the pump
head. Press the tool firmly into the pump head, then remove it.
6. Using the small tip part of the insertion tool, push the seal into the pump head as far
as it will go.
7. Replace the plunger bearing on top of the seal. Make sure the grooves in the
bearing are facing outward and are visible as you look at the pump head.
8. Remoisten the seal and plunger with methanol.
Pull the pump head straight off to avoid breaking the plunger.
Mounting Screws
Maintaining the 1525 Pump
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