MAINTENANCE PROCEDURE NO.
ME-AB-006-PM
REV. 01
TITLE/TAG
SERVICE AXIAL FAN UNIT
EQUIPMENT TYPE
AXIAL FAN UNIT (CONTROLLABLE PITCH)
INTERVAL
1 YEARLY
DATE: 17-04-01
PRECAUTIONS
Note: Tick boxes to indicate completion.

1. Obtain an approved Work Permit before commencing activities.
PREPARATION/ISOLATION

2. Check that the equipment tags are as detailed on work order sheet/work permit.
3. Check ‘Electrical Isolations’ section of work permit has been signed and verify that
equipment is isolated.

MAINTENANCE ACTIVITY

4. Check security of blade adjustment control arm.
CAUTION: TO PREVENT MOTOR OVERLOAD, DO NOT OPERATE UNIT IF
BLADE ANGLE EXCEEDS MAXIMUM ANGLE STATED ON UNIT
CASING.








5. Drain flush and refill the sleeve bearing.
6. Refill bearing with 33cm Petromin Molly/NLGI #2 grease.
3
7. Check condition and security of guard screen.
8. Check security of supports and fixing devices.
9. Request reinstatement of power for test run purposes and check unit operates correctly.
10. Check for abnormal noise or excessive vibration.
11. Carry out vibration checks with hand held analyser and compare with previous readings.
12. Sign off the Work Permit.
NOTE:
Refer to Vendor Work Instructions of vibration limitations (Vibration Severity Chart)
for Model D47 axial fans.
REPAIR WORK
13. Is repair work or corrective action required?
YES 
NO 
14. Has a Work Order been raised?
YES 
NO 
REFERENCE INFORMATION
Chicago Blower, Type 47, Operation & Maintenance Manual
Vibration Severity Chart – D47 Axial Fan