Type of
maintenance
Purpose Inspection interval
Periodical
inspection
The inspection prevents operational interruptions and
machine breakdowns. The measures to increase
performance and pump efficiency are decided for each
application. They can include such things as impeller
trimming, wear part control and replacement, control of
zinc-anodes and control of the stator.
Up to every year
Applies to normal applications and
operating conditions at media
(liquid) temperatures <40°C
(104°F).
Overhaul The overhaul lengthens the operating lifetime of the
product. It includes the replacement of key components and
the measures that are taken during an inspection.
Up to every three years
Applies to normal applications and
operating conditions at media
(liquid) temperatures <40°C
(104°F).
NOTICE:
Shorter intervals may be required when the operating conditions are extreme, for
example with very abrasive or corrosive applications or when the liquid temperatures
exceed 40°C (104°F).
6.4.1 Inspection
Service item Action
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.
Connection to power Check that the connections are properly secured.
Electrical cabinets Check that they are clean and dry.
Impeller 1. Check the impeller clearance.
2. Adjust the impeller, if necessary.
Stator housing 1. Drain all liquid, if any.
2. Check the resistance of the leakage sensor.
Normal value approximately1500 ohms, alarm approximately
430 ohms.
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 the local safety regulations are followed.
Lifting handle 1. Check the screws.
2. Check the condition of the lifting handle and the chain.
3. If necessary, replace.
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 secured.
Thermal contacts Normally closed circuit; interval 0–1 ohm.
6 Maintenance
Flygt 3102 Installation, Operation, and Maintenance Manual 47
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