Assemble Pump Heads (G7104A)Assemble Pump Heads (G7104C)

This procedure shows how to exchange seals, and reassemble the pump head assembly.

Exchanging seals is exemplarily shown for the primary pump head, but works in the same way for the secondary pump head.

Tools required

Qty.	p/n	Description
1	G7120-68708	InfinityLab System Tool kit
1	5067-5688	Torque wrench 1 - 25 Nm with 14 mm wrench
1	G4220-20013	4 mm hex bit
1	G4220-20015	Adapter ¼ in square to hex
1	G4220-20041	Bit Torx 10x25 mm
1	5043-1400	Pump Head Holder
1	5067-6197	Seal Handling Device
1		Isopropanol

Parts required

Qty.		p/n	Description
2		0905-1719	PE Seal
2		0905-1175	Wash seal (PTFE)

NOTE

Seals must be exchanged in both primary and secondary pump heads.

Lubricate the seals, the seal holder, and the pump chambers with isopropanol.
Repeat for the other pump chamber.
Repeat for the other seal holder.
Lubricate piston with isopropanol before insertion.
Mind the correct orientation of the seal holder.
Loosely tighten the pump head screws in a crosswise manner until the spring housings tilt slightly.
Tighten the pump head screws crosswise.
Do not fix the screws at this stage!
Binary/High-Speed Pumps only

21-Jun-2025