Servicing
8.3 Maintenance and servicing work
90 Edition 06/2022 A5850-02en
Procedure
Proceed as follows to clean the fan and gear unit:
1. Remove the air guide cover.
2. Use a hard brush to remove any stubborn dirt from the impeller, air guide cover and pro-
tective grille. Never use a high-pressure cleaning device.
3. Treat any areas of corrosion.
4. Reinstall the air guide cover.
5. Make sure that the air guide cover is correctly fastened.
Make sure that there is no contact between the fan and the air guide cover.
8.3.4 Checking the cooling coil8.3 Maintenance and servicing work
Introduction
A soiled cooling coil can cause damage to the gear unit. It is therefore important to check the
cooling coil regularly.
Procedure
To check the cooling coil, proceed as follows:
1. Shut off the cooling water supply.
2. Disconnect the cooling water inlet and drain lines from the cooling coil.
3. Inspect the inner surface of the cooling coil for deposits.
– If you discover that there are heavy deposits inside the cooling coil, arrange for the
cooling water or the deposits to be analysed. Analysis services of this kind are offered
by specialist chemical cleaning companies. These companies also sell special clean-
ing agents for removing deposits.
– Before you use a cleaning agent, check whether it is suitable for use on the cooling
coil materials. You must consult Flender Customer Services. Carefully read the in-
structions for use supplied by the manufacturer before using different kinds of cleaning
agent.
– Replace especially severely soiled cooling coils by new ones. Please consult Flender
Customer Services (Page95)for further advice.
4. Reconnect the cooling water inlet and drain lines to the cooling coil.
NOTICE
Build-up of heat due to soiled cooling coils
Overheating can damage the gear unit.
When the cooling coil is severely soiled, it can no longer be guaranteed to cool the gear
unit effectively. In such cases, you must chemically clean the inside of the cooling coil or
have it replaced with a new one.
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