Xylem FLYGT 2640.181, Service And Repair Instructions, Page: 58 / 72

Service item Action
Impeller 1. Check for worn or damaged parts.
2. Adjust and/or replace if necessary.
Wear on the impeller or surrounding parts necessitates fine adjustments of the impeller or
replacement of worn parts.
Oil Check the oil:
1. Take an oil sample.
2. If the oil contains particles, then replace the mechanical seal. Contact an authorized
service shop.
Make sure that the volume is filled to the correct level.
A smaller amount of water is not harmful for the mechanical seal.
Cable entry 1. Check that the following requirements are met:
– Standard pump version: The cable entry must be firmly tightened into its bottom-
most position.
– The seal sleeve and the washers must conform to the outside diameter of the
cables.
2. Cut off a piece of the cable so that the seal sleeve closes around a new position on the
cable.
3. Replace the seal sleeve, if necessary.
Inspection
volume
1
1. Check that the inspection screw is properly tightened.
2. Remove the inspection screw.
3. Drain all liquid, if any.
4. If there is oil in the inspection volume, then empty the oil and check again after one
week. If there is oil in the inspection volume again, then replace the mechanical seal.
Contact an authorized service shop.
5. If there is water in the inspection volume, then check that the inspection screw O-ring is
not damaged.
Cable 1. If the outer jacket is damaged, then replace the cable.
2. Check that the cables do not have any sharp bends and are not pinched.
Cooling system If the flow through the system has been partly restricted, then rinse and clean.
Level sensors or
other sensor
equipment
1. Check the functionality.
2. Repair or replace any damaged equipment.
3. Clean and adjust the equipment.
Starter equipment 1. Check the condition and functionality.
2. Contact an electrician, if necessary.
Insulation
resistance in the
stator
1. Check the insulation between:
– Phase–phase on the stator
– Phase–ground (earth)
The insulation should be > 1 megaohm. Use a 1000-VDC megger to test the
insulation.
2. If the resulting value is < 1 megaohm, then contact an authorized service shop.
4.7.2 Overhaul
The basic repair kit includes O-rings, seals, and bearings.
For an overhaul, do the following in addition to the tasks listed under Inspection.
Service item Action
Support and main bearing Replace the bearings with new bearings.
Mechanical seal Replace with new seal units.
1
Regardless of individual applications, the inspection volume should not be inspected less frequently than the intervals for normal applications and
operating conditions at media (liquid) temperatures <40°C (104°F).
4 Maintenance
56 2640.181/.281 Service and Repair Instructions