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MAINTENANCE
6.2.1.5 Belts
Replacement of drive belts needs to be conducted routinely. The frequency of replacement will be determined by hours
of operation, operational environment and previous maintenance schedule. Belts should be visually inspected monthly
with a thorough inspection every 3rd month.
Tools Required: Metric open-end ring spanner set, Drive belt tensioning gauge, Pry bar or lever bar and ½" Socket set.
The following are the recommended steps to replace the drive belts. Before works commence ensure all spare parts
ordered match that of the unit they are replacing. Aira units are often custom specified for each application and may
have components which differ from the standard product offering.
1. Electrically isolate unit.
2. Remove Blower Box access panels.
3. Loosen motor platform bolts.
4. Slacken and remove drive belt/s.
5. Check Pulleys for excess wear, replace if necessary.
6. Replace Belt/s. For multiple drive belt units ensure that they are a matched set. Belts from different suppliers and
different batch lots will differ in length.
6.2.1.6 Pulleys
Pulleys are manufactured from steel or aluminium and will generally require replacement less than the drive belts. Any
wear on the pulleys will shorten the drive belt life, therefore should be replaced if there are any signs of wear.
Tools Required: Metric open end ring spanner set, Drive belt tensioning gauge, Pry bar or lever bar, ½" Socket set,
metric hex key set, nylon hammer.
1. Electrically isolate unit
2. Remove Blower Box access panels
3. Loosen motor platform to scroll nuts
4. Slacken and remove drive belt/s
5. Remove Pulley/s from Taperlock bush. A taper lock bush is used to secure the pulleys to the drive shaft. If
unsure on how to remove the taper lock bushes refer to the Fenner brand bush guide. Alternately contact Seeley
International for Service assistance.
6. Remove Taperlock bush from shaft, may require gentle tapping with nylon hammer.
7. Remove Pulley/s.
8. To reinstall pulley complete operation in reverse.
Note:
a). The same diameter and belt designation must be used to ensure correct operation. Failure to do so will result
in poor unit performance. It may also cause the drive motor to overamp.
b). Bolt tensions should be in accordance with bolt manufacturer's recommendations for the bolt diameter, thread
type and material. All mount bolts should be high tensile and a minimum grade of 8.8. Anti-seize should be
used on all stainless steel bolts.
c). Belt Tensioner recommended when replacing/reinstalling belts.
d). This is ONLY applicable to units with a Seeley supplied blower box. 3rd Party blowers will have their own
maintenance schedule.
6.2.1.7 Fan Direction
Check that the fan is blowing in the right direction. If the fan is running in reverse change check the wiring diagram and
swap the power to the motor.
AL SERIES INSTALL OPERATION MAINTENANCE MANUAL |
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