3-60 Troubleshooting, Testing, and Maintenance
c. Slide the insertion tool with the seal into the guide and press to
firmly seat it in the pump head. Remove the insertion tool and
guide.
Replacing the pump head seal
Tip: Wet the seal with a small amount of solvent before continuing with
step 5.
5. Place the three plunger bearings behind the seal in the pump head as
follows:
• Bearing 1’s grooved side faces the rear of the pump head.
• Bearing 2’s grooved side faces the front of the pump head.
• Bearing 3’s grooved side faces the front of the pump head.
6. Carefully slide the pump head assembly onto the pump head support
assembly. Ensure the indicator rod goes into the correct hole.
Caution: Inspect the plunger for scoring that could impair the
seal.
TP02050
Seal
Guide
Insertion tool
Pump head
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