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1.2
Safety advice
1.2.1 General information
It is assumed that maintenance work is carried out by qualified personnel (for definition of qualified personnel, see
DIN VDE 0105 or IEC 364).
After carrying out maintenance work, refer to Section 6, Start-up in the Instructions for 1FK6 motors again!
1.2.2 Safety instructions
Electrical dangers
Before starting any work on the motor or unit, and especially before uncovering live parts, disconnect the motor from
the power supply. Remember to disconnect any supplementary or auxiliary circuits as well as the main circuits.
The standard „5 safety rules" according to DIN VDE 0105 apply:
• Isolate from electrical supply
• Secure against switching on
• Check electrical deadness
• Earth and short-circuit
• Cover or cordon off adjacent parts which are electrically live.
The above actions may only be reversed when all repair work has been completed and the motor has been
completely re-assembled.
The system must be disconnected from the power supply before any work is carried out! Due to the fact that the
motors contain permanent magnets, a voltage of 400 V at 1000 rpm is generated at the motor terminals when the
rotor is turned.
Do not touch the terminals or cables while the rotor is rotating. Do not use any electrically conductive tools.
Never connect the motors directly to a three-phase mains.
When removing or fitting parts, make sure that connecting leads are not damaged, are not under tension and can
not come into contact with moving parts.
Caution: Encoder systems containing integrated electronics (encoder, resolver) are electrostatically
sensitive components (ESDs).
The following rules must be observed when working on ESDs:
• The place of work must be earthed,
• The connector pins must not be touched directly,
• No electrostatic charge must be transferred on contact (a conductive object should be touched immediately
before such contact is made),
• Suitable packaging must be used for transport (corrugated cardboard boxes, conductive plastic bags, not
ordinary plastic bags, no polystyrene).
Disassembly
Before disassembly of the motor (e.g. to replace bearings), the original position of the end shields relative to the
motor housing should be marked (e.g. with colored marker or marking tool) in order to simplify refitting.
Assembly
Damaged parts must be replaced. Use only spare parts and attachments approved by the manufacturer.
If seals are fitted to meet the specified degree of protection, they must be inspected and replaced if necessary.
NOTE: We recommend replacing all seals between parts which are removed. The seals should be made of FPM
(fluorocarbon rubber).
Sealing faces without O-rings should be sealed with a sealant (e.g. Fluid D by Teroson, Heidelberg).
Nuts and nuts which are fitted with locking, spring-loaded and/or force-imparting elements (e.g. lock washers, spring
washers) must be refitted with the same types of elements, which must be in good working order, when
reassembled. In so doing, positive fitting securing elements must always be renewed.
All screws without locking elements must be secured with Loctite 243, except for screws for the connecting
terminals, the terminal box lid and the upper part of the terminal box.
The screws on the terminal box lid and the upper part of the terminal box fulfil an protective earthing
function and must neither be removed nor coated with anything which would isolate the screws from the
housing or the terminal box (e.g. Loctite).
For screw connections, the tightening torques given in Table 1:, "Tightening torques for screwed joints," on page 7
apply unless otherwise stated in the operating instructions or other instructions supplied.
4
610.41 334.02
Siemens AG
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