Renewing Thrust-Handling-Device Wear Parts; Chamber Stack - Grundfos CR 95 Service Instructions Manual

4. Renewing thrust-handling-device wear parts

Preparations
Renewing the thrust-handling-device wear parts requires that the
thrust-handling device (120) has been removed as described in the
section on servicing the thrust-handling device by dismantling the
entire pump or in the section on servicing the thrust handling device
from the pump base.
Dismantling
1. Remove the rotating lock ring (120d) from the thrust disc (120a).
2. Remove the rotating ring (120b) from the thrust disc (120a).
3. Remove the O-ring (120c) from the thrust disc (120a).
4. Remove the O-ring (120i) and the three O-rings (120j) from the
flange (120k).
Assembly
1. Install the O-ring (120i) and the three O-rings (120j) on the
flange (120k).
2. Install the O-ring (120c) in the thrust disc (120a).
3. Install the rotating ring (120b) in the thrust disc (120a).
4. Install the rotating lock ring (120d) in the thrust disc (120a).
Related information
3.3.1 Servicing the thrust-handling device by dismantling the entire
pump
3.3.3 Servicing the thrust-handling device from the pump base

4.1 Chamber stack

The chamber stack can be serviced in two ways depending on
which service tool is used for the work:
• Service tool for vice mounting (H1), see the section on servicing
the chamber stack in service tool for vice mounting.
• Service tool for pump base mounting (H2), see the section on
servicing the chamber stack in service tool for pump base
mounting.
Related information
4.1.1 Servicing the chamber stack in service tool for vice mounting
4.1.2 Servicing the chamber stack in service tool for pump base
mounting
7.3.1 Special tools
4.1.1 Servicing the chamber stack in service tool for vice
mounting
Preparations
Removing the chamber stack requires that the pump has been
dismantled as described in the section on removal of the motor and
coupling, the section on shaft seal, motor stool, pump head cover,
sleeve and chamber stack and the section on thrust-handling
device.
• Assemble service tool H1. See the figure below.
Service tool H1
12
Procedure
1. Place service tool H1 securely in a vice. See the figure below for
correct positioning.
2. Fit service tool B in the end of the pump shaft (51).
3. Attach approved lifting equipment to service tool B and lift the
chamber stack out of the pump base (6).
4. Lift the chamber stack onto service tool H1. See the figure
below. Make sure the pump-shaft end engages with the service
tool.
Positioning the chamber stack in service tool H1
5. Align the hole in the pump shaft with the hole in service tool H1
marked "Dismantling". See the figure above.
6. Fit service tool D in the hole marked "Dismantling".
Dismantling
Locking the shaft in service tool.
7. Continue to the section on dismantling the chamber stack.