10
Replace the Pump Drives (Binary and High Speed Pumps)
Remove the Pump Head Assembly
Replace the Pump Drives (Binary and High Speed Pumps)
When If the pump drive is damaged.
Parts required p/n Description
G4220-60250 Drive Unit Channel A Pendulum
G4220-60260 Drive Unit Channel B Pendulum
Preparations • Bring the pump drives to their maintenance position and remove the pump heads
• Remove the main board
• Remove the middle layer foam
Sensitive pump drive encoder
The pump drive encoder can be damaged easily.
➔
Do not apply tension to it during removal or installation.
This procedure describes the removal of the pump drive assembly for channel A. One pump drive
assembly consists of two individual drives that are connected.
1
Remove the cables from the pump drive encoders.
2
Disconnect the power cables from the pump drive.