Bio-Rad ChromLab™ Software - Manual (Page 165)

System and Sample Pumps
Instrument Guide | 163
2. Unscrew each IN check valve housing and pull it down out of the pump head.
You should have removed a total of two IN check valve housings and four
check valve capsules. If one of the capsules remains in the pump head, use
tweezers to remove it.
3. Turn the pump head housings upside down with the OUT check valve on the
bottom.
4. Unscrew each OUT check valve housing and pull it out of the pump head.
You should have removed a total of two OUT check valve housings and four
check valve capsules. If one of the capsules remains in the pump head, use
tweezers to remove it.
5. Set the IN and OUT check valve housings and capsules in a safe location.
To assemble the pump head check valves
1. Locate two check valve capsules for each check valve that you are assembling.
Note: If you are assembling the IN and OUT check valves for both pump
heads, you need eight capsules.
2. Carefully observe each capsule. The arrow on the side of each capsule
indicates the flow direction. Ensure you insert the capsules with the arrows
pointing in the direction of flow.