Replacing Peristaltic Pump Pressure Rollers And Springs - ABB SCC-C Operator's Manual

Replacing Peristaltic Pump Pressure Rollers and Springs

When do the Pressure
Rollers and Springs
need to be Replaced?
Replacing Pressure
Rollers and Springs
(see Fig. 6)
18
The pressure rollers in the peristaltic pumps must be replaced when their surface
is damaged.
The pressure springs in the peristaltic pumps must be replaced when they are
broken.
Step Action
1 Stop the sample gas supply and shut off the sample gas cooler
power supply.
Remove the hose from the peristaltic pump:
2 Using the handles, press the moving belt 1 together and turn the S-
clip 2 in a clockwise direction as far as its limit stop; then remove the
moving belt and peristaltic pump hose from the pump head.
Dismantle the pump head:
3 Unscrew the two nuts 3 that secure the pump head (spanner size 5.5).
4 Pull the pump head 4 off the roller bearing axle, and remove the roller
support 5 from the pump head.
Replace pressure rollers and springs:
5 Remove the pressure springs 6 from the hole in the roller support 5
and from the retaining slot in the roller axle 7. Remove the roller axle
from the roller support and pull the pressure roller 8 off the roller axle.
6 Push the new pressure roller 8 onto the roller axle 7 and secure with
new pressure springs 6 in the roller support 5.
Fit the pump head:
7 Insert the roller support 5 in the pump head 4, and push both
components together onto the roller support axle. During this
process, check to endure that the roller support axle and roller
support fit together properly.
8 Secure the pump head 4 with the two nuts 3.
It is expedient to open the front cover forwards: this enables the
pump's base plate with the fastening screws to be secured
from inside.
Refit the peristaltic pump hose:
9 Insert moving belt 1 with the peristaltic pump hose in the pump head;
using the handles, press the moving belt together while at the same
time turning the S-clip 2 counterclockwise until it engages.
Start the sample gas cooler again:
10 Switch power supply to sample gas cooler on.
11 The sample gas flow should only be restarted after the lead time
period.
SCC-C Sample Gas Cooler Operator's Manual
Continued on next page
42/23-55 EN Rev. 1