Servicing and maintenance
41
13.2.1
Disconnection from the mains with KES-d electrical connection
Figure38: KES Ex d electrical connection
[1] Cover [2] Screws for housing
[3] O-ring [4] Plug-in frame (KES)
WARNING
Ignition of potentially explosive atmospheres caused by sparks
Risk of death or serious injury
à Before opening the flameproof enclosure, ensure absence of gas and voltage.
à Handle cover and housing parts with care.
à Joint surfaces must not be damaged or soiled in any way.
à Do not jam cover during fitting.
Removing the plug 1. Loosen the screws [2].
2. Remove electrical connection.
ð For electrical connections of KES type, cover [1] and connection frame [4] re-
main assembled.
3. Seal open plug/socket connection, e.g. using AUMA protection cover and parking
frame.
Fitting the plug 4. Clean sealing faces of plug/socket connector and housing.
5. Preserve joint surfaces with an acid-free corrosion protection agent.
6. Check whether O-ring [3] is in good condition, replace if damaged.
7. Apply a thin film of non-acidic grease (e.g. petroleum jelly) to the O-ring and insert
it correctly.
8. Replace electrical connection and fasten screws evenly crosswise.
13.3
Maintenance
Manual operation During maintenance, the mechanical parts of the handwheel activation, in particular
motor coupling and retaining spring, must be checked. Replace the parts in case of
visible wear.
Lubrication • In the factory, the gear housing is filled with grease.
• Additional lubrication of the gear housing is not required during operation.
• Grease change is performed during maintenance
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