Installation, Operation and Maintenance manual
28
PowerCore
®
Dust Collectors - Series CPC
Renewing fan impeller and/or motor:
Refer also to Table 2.
1. Make a note of the distance from either impeller back plate to fan case (preferred)
or inlet eye to impeller front plate, as this will assist with replacement. If required,
refer to Donaldson for exact dimensions.
2. From front of fan assembly (non motor end) remove impeller inlet eye from fan
casing by removing outer circle of bolts and pulling away the plate.
3. Undo grub screw that holds hub onto motor shaft.
4. Undo and remove bolt in end of motor shaft holding the hub retaining washer.
5. Remove motor key by easing it out from keyway.
6. Using the location grooves machined into hub, pull impeller from motor shaft and
out through the front of fan case.
7. Slide spacer off motor shaft.
8. Remove the 4 nuts, bolts and washers holding motor to pedestal.
9. The motor can now be removed using suitable lifting equipment, taking care
not to damage sealing washer placed between motor endplate and fan casing.
10. Place the new motor on support pedestal and locate rubber sealing washer
between fan case and motor.
11. Position motor on pedestal and secure loosely by replacing the 4 nuts, bolts and
washers.
12. Locate motor key into keyway on motor shaft.
13. Push motor shaft spacer onto motor shaft.
14. Align keyway of impeller hub onto key and slide impeller onto motor shaft.
15. Replace hub retaining washer and shakeproof washer. Apply thread lock to motor
end shaft bolt and replace bolt, ensuring impellor is pushed back onto spacer.
16. Apply thread locks to grub screws holding hub and tighten into place.
17. Locate impeller, according to the dimension taken during removal, by moving
motor along pedestal, ensuring motor remains square to fan case.
18. If the measurement was taken from impeller back plate to fan case, adjust to
suit and tighten motor fixing fasteners through pedestal and motor feet. Replace
inlet eye, using a bead of sealant between the plate and fan case and replace
outer circle of bolts.
19. If the measurement was taken from inlet eye to impeller front plate, then replace
inlet eye, using a bead of sealant between the plate and fan case and replace
outer circle of bolts. Adjust impeller to suit and tighten motor fixing fasteners
through pedestal and motor feet.
20. If a measurement was not taken, then replace inlet eye, using a bead of sealant
between the plate and fan case and replace outer circle of bolts. Adjust impeller
so that there is approximately 2 mm clearance between inlet eye and front of
impeller and tighten motor fixing fasteners through pedestal and motor feet. For
ignition minimising fans the minimum clearance must be >1% of the relevant
contact diameter.
21. Rotate impeller by hand, adjusting where necessary, to ensure that impeller
runs freely.
