Rockwell Automation Publication 6000-TG100A-EN-P - September 2020 33
Chapter 3 Component Inspection and Test Procedures
4. Disconnect the fan from the terminal block.
5. Remove and retain eight M8 x 20 hexagon combination screws that
secure the fan support bracket, and remove the bracket.
6. Remove and retain five M6 x 16 and four M4 x 12 hexagon combination
screws that secure the fan, and remove the fan.
7. Install the fan in the reverse order of its removal. Rotate the impeller by
hand to verify that there is no contact with the fan housing assembly.
Fan Balance
Fan impellers are statically and dynamically balanced within acceptable
tolerances at the factory. Damage in shipping or from incorrect handling or
installation may upset the balance. An improperly balanced impeller can lead
to excessive vibration causing undue wear on the entire unit.
If vibration is excessive, shut down the fan and determine the cause. Common
causes of excessive vibration include:
• Drive support structure not sufficiently rigid or level
• Loose mounting bolts
• Loose impeller or bushing
Inspect/Replace Door
Position Limit Switch
1. Open the drive cabinet door.
2. Disconnect the aviation plug from the back of the limit switch.
3. For A-Frame drives – remove two M4 x 30 bolts from the mounting
bracket.
For B-Frame drives – remove two M4 x 35 bolts and hardware from the
mounting bracket.
4. Install the new limit switch in reverse order of removal.
ATTENTION: The fan must be handled with extreme care. Failure to do so
can alter the fan balance and will negatively impact performance and life
span.
ATTENTION: Verify that the input circuit breaker feeding the drive is open.
Lockout and tagout the input circuit breaker before performing any work on
the drive or bypass units.
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