Service item Action
Insulation Use a megger maximum 1000 V.
1. Check that the resistance between the ground (earth) and phase lead
is more than 5 megohms.
2. Conduct a phase-to-phase resistance check.
Junction box Check that it is clean and dry.
Lifting device Check that local safety regulations are followed.
Lifting handle 1. Check the screws.
2. Check the condition of the lifting handle.
3. Replace if necessary.
O-rings 1. Replace the oil plug O-rings.
2. Replace the O-rings at the entrance or junction cover.
3. Grease the new O-rings.
Overload protection and other
protections
Check the correct settings.
Personnel safety devices Check the guard rails, covers, and other protections.
Rotation direction Check the impeller rotation.
Oil housing Fill with new oil, if necessary.
Terminal block/closed end splice Check that the connections are properly tightened.
Thermal contacts Normally closed circuit; interval 0–1 ohm.
Voltage and amperage Check the running values.
6.3.2 Major overhaul
For a major 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.
6.3.3 Service in case of alarm
For information about indication values for sensors, see Sensors connection (page 34).
Alarm source Action
CLS Check for water in the oil housing. If the oil contains too much water, then
do the following:
1. Drain the oil and water.
2. Replace with new oil.
FLS 1. Check for liquid in the stator housing.
2. Drain all liquid, if any.
3. Check the mechanical seal unit, the O-rings, and the cable entry, if
liquid was found.
Thermal contact Check the start and stop levels.
The overload protection Check that the impeller can rotate freely.
6.4 Replace the impeller
Required tools:
• 6 mm hexagon bit adapter with an extension of at least 125 mm (4.92 in)
• Impeller puller
If applicable, contact your local sales and service representative for correct type and
size.
6 Maintenance
44 Flygt 3085 Installation, Operation, and Maintenance Manual
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