Maintenance
9.3 Corrective maintenance
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
132 Operating Instructions, 06/2018, A5E44455710A
● Use a suitable tool to pull off the fan (puller).
● Locate the arms of the pulling tool in the breakout openings and slightly tension the
pressure screw of the tool.
● For fans with snapping mechanisms, simultaneously release the two snap-in lugs of the
fan from the annular shaft groove.
Keep the snap-in lugs in this position.
● Uniformly withdraw the fan from the shaft by turning the pressure screw of the pulling tool.
● Do not apply any hammer blows to avoid damaging the rotor shaft, the fan and the
bearings.
● Order the appropriate new parts if damaged.
Metal fan disassembly
Metal fan
● Remove the locking ring.
● Use a suitable tool to pull off the fan (puller).
● Locate the arms of the pulling tool in the openings in the fan in the vicinity of the hub.
● Alternatively, place the pulling tool at the outer edge of the fan plate.
● Uniformly withdraw the fan from the shaft by turning the pressure screw of the pulling tool.
● Do not apply any hammer blows to avoid damaging the rotor shaft, the fan and the
bearings.
● Order the appropriate new parts if damaged.
● Take care not to damage the snapping mechanisms on fans that are equipped with these.
● To ensure this, the fans should be heated to a temperature of approximately 50 °C
around the area of the hub.
● If any damage is caused, request new parts.
Cable entries, sealing plugs and thread adapters
All cable entries and sealing plugs must be approved for use in the respective hazardous
zone.
● Any openings that are not being used must be sealed using the appropriate certified
sealing plugs.
● Please observe the manufacturer's specifications when fitting cable entries.
Note the following when mounting:
● Avoid damaging the cable jacket.
● Adapt the tightening torques to the cable jacket materials.
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