Type of
maintenance
Purpose Inspection interval
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).
6.5.1 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 clearance.
2. If necessary, adjust.
Stator housing 1. Drain any liquid.
2. Check the resistance of the leakage sensor.
Normal value approximately 1500 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 O-rings of the oil plugs.
2. Replace the O-rings at the entrance or junction cover.
3. Lubricate 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 If necessary, fill with new oil.
Electrical connections Check that the connections are properly secured.
Thermal contacts Normally closed circuit; interval 0–1 ohm.
Voltage and amperage Check the running values.
6.5.2 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.
6 Maintenance
Flygt 3069 Installation, Operation, and Maintenance Manual 43
EN
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