Xylem FLYGT 2640.181, Service And Repair Instructions, Page: 21 / 72

WS006894A
Figure 4: Example of O-ring adjacent surfaces
During the reassembly, always make sure that existing index markings are in line.
The reassembled drive unit must always be insulation-tested and the reassembled pump
must always be test-run before normal operation.
4.2 The fault-tracing process
4.2.1 Trace faults in the drive
Check the stator.
See Check the stator on page 19.
↓
Check inspection chamber / stator housing
↓
Abnormal leakage?
→
Yes
→
Basic Repair Kit (BRK): Mechanical
seals, bearings and O-rings
↓
No
↓
Check buffer fluid
↓
Abnormal leakage? → Yes → Outer seal
↓
No
↓
Oil change
4.2.2 Check the stator
1. Perform the 500–1000 V DC insulation test by measuring R
1
— R
6
.
R
1
— R
6
are defined in the following table.
4 Maintenance
2640.181/.281 Service and Repair Instructions 19