Parameter
Measurement
R
1
U
1
— ground
R
2
V
1
— ground
R
3
W
1
— ground
R
4
U
1
— V
1
R
5
U
1
— W
1
R
6
V
1
— W
1
2. With an ohm meter, check that R
7
— R
9
are reasonably uniform.
Parameter
Measurement
R
7
U
1
— U
2
R
8
V
1
— V
2
R
9
W
1
— W
2
3. Use the following flowchart to determine the action needed.
Insulation test
R
1
–R
6
: 1 or more value is
0 MΩ
→
Yes
→
→
→
New stator, and BRK
↓
No
↓
Insulation test
R
1
–R
6
: All values are > 5
MΩ
→
Yes
→
Are R
7
, R
8
and R
9
reasonably uniform?
→
Yes
→
BRK
(Stator is OK.)
↓
↓
No
→
→
No
→
New stator, and BRK
↓
Insulation test
R
1
–R
6
: 1 or more value is
0.1–5 MΩ
→
Yes
→
Are R
7
, R
8
and R
9
reasonably uniform?
→
Yes
→
Clean and dry stator,
and BRK
↓
→
→
No
→
New stator, and BRK
Basic Repair Kit (BRK): Mechanical seals, bearings and O-rings
4.2.3 Trace faults in the wet end
Check the status of the wet-end components to determine the service needed.
The following table shows the general service items.
Service level
Description
1
Trimming
2
Wear Part Kit (impeller and suction cover)
3
Hydraulic Repair Kit (diffuser and oil house bottom)
4
Wear Part Kit plus Hydraulic Repair Kit
4.3 Torque values
All screws and nuts must be lubricated to achieve correct tightening torque. Screws that
are screwed into stainless steel must have the threads coated with suitable lubricants to
prevent seizing.
4 Maintenance
22
2620.172/.281 Service and Repair Instructions
Summary of Contents for Flygt 2620.172
Page 1: ...Service and Repair Instructions 885611_2 0 2620 172 281...
Page 2: ......
