Agilent 8453 Dissolution Testing System Installing and Operating Manual 75
Using the Peristaltic Pumps 1VS and 8VS 3
Maintaining Your Pump
Removing the Tubing Cassette
You may want to change the pump tubing for different applications, or when it
becomes worn. You must remove the tubing cassette to change the tubing.
1 Release the tubing cassette from the right side of the pressure wheel by
pressing the snap-lock lever to the left and upwards of the locking-bar.
2 Remove the tubing cassette from the mounting pivot on the left side of the
pressure wheel by lifting upwards.
3 Remove pump tubing—release the fixing collars on each side of the cassette
from the locating holes and slide the tubing out of the cassette.
See “Stage 1: Installing the Cables” on page 28 for replacing the tubing, and
“Stage 3: Installing the Tubing Cassette” on page 30 for replacing the
tubing-cassette.
Changing the Pressure-wheel Assembly
It may be necessary to replace the pressure-wheel assembly when it becomes
worn or damaged. Also there are a number of reasons why it may be necessary
to replace the drive assembly:
• a new fuse blows immediately,
• the pump does not work in manual operation, or
• the pumping speed is not steady.
Removing the Pressure-Wheel Assembly
See Table 20 on page 74 for the part numbers for exchanging the
pressure-wheel assembly and drive assembly. For exchanging either part you
remove the pressure-wheel assembly. You require a 3 mm hex key to remove
pressure wheel.
Make sure the line-power cord is disconnected before removing the
tubing-cassettes.