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Pump Head Maintenance (Tool Free)
Disassemble Long Life Pump Heads
Pump Head Maintenance (Tool Free)
1290 Infinity II Flexible Pumps (G7104A) and 1290 Infinity II High Speed Pumps
(G7120A) are equipped with Long Life Pump Heads.
Long Life Pump Heads offer a significantly increased lifetime of pistons and seals
compared to other pump heads.
Maintenance of Long Life Pump Heads requires no special tool.
The following procedures explain the maintenance of Long Life Pump Heads.
Disassemble Long Life Pump Heads
This procedure shows how to open the pump head assembly, exchange seals, and clean
pistons.
Exchanging seals and cleaning pistons is exemplarily shown for the primary pump
head, but works in the same way for the secondary pump head.
Tools required p/n Description
G7120-68708 HPLC System Tool Kit-Infinity-II
5043-1400 Pump Head Holder
5067-6197 Seal Handling Device
8660-0852 Abrasive mesh
Isopropanol
Seals must be exchanged and pistons must be cleaned in both primary and secondary pump heads.
1
Counter the outlet valve while opening the lock screw of the
heat exchanger capillary.
2
Remove the heat exchanger capillary by pushing the connector
up and pulling it out of the valve.
A gold seal between outlet valve and heat exchanger
capillary is used for a tight connection.
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