MK Plastics RKW IO&M - Manual (Page 8)

1. Remove pulleys from their respective shafts.
2. Clean the motor and fan shafts.
3. Clean bores of pulleys and coat the bores with heavy oil.
4. Remove grease, rust, or burns from the pulleys and shafts.
5. Remove burrs from the shaft by sanding.
6. Place fan pulley on the fan shaft and motor pulley on its shaft. Damage to the pulleys can occur when excessive force
is used in placing the pulleys on their respective shafts.
7. Tighten in place.
8. Install belts on pulleys and align as described in the Belt and Pulley Installation section.
Flange Bearing & Wheel Replacement
Please refer to Fig. 8 for the following procedures. The fan bearings are housed inside the flange bearing assembly, which
includes the shaft. It is easier and quicker to replace the entire assembly, rather than the bearings themselves.
1. V-belt
2. Motor
Pulley
3. Flange-bearing assembly
4. Shaft
5. HEX screws, nuts & washers
6. Shaft seal
7. HEX nut & washers
8. Cap
9. Threaded
stud
10. Wheel key
11. Neoprene gasket
Fig. 8 – Flange Bearing Assembly
1. Remove the fan motor cover.
2. Remove the fan drive belt and pulley.
3. Unbolt and remove the motor plate, complete with
the motor/flange-bearing and wheel assembly –
see page 3. for further details. This will give you
access to the wheel.
4. Remove by unscrewing the front protective cap,
and then the nut, washers and threaded stud.
5. Remove the wheel from the shaft – a 2-jaw puller
may be needed.
6. Remove the assembly hardware that holds the
entire flange-bearing assembly to the motor
support. The flange bearing assembly can now be
removed, complete with the shaft.
7. Before replacing the assembly, make sure the
shaft and keys are clean and smooth.
8. Re-attach the flange bearing assembly to the
stand plate, but make sure the gaskets and seals
are in good condition. Replace if necessary.
9. Inspect and clean the bore of the wheel. Gently
slide the wheel onto the shaft after inserting the
key, and re-install the threaded stud, nut and
washers to the shaft, and tighten. Make sure the
wheel hub is sitting well against the snap ring on
the shaft. Re-install the cap and tighten well.
10. Re-attach all the pulleys and adjust the belt
tension.
11. Test run and retighten all screws and bolts if
necessary.
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