6. Tap the bushing onto the shaft aligning the keyways.
7.
BELT DRIVE UNITS:
Align the bushing and key to be flush
with the end of the shaft (Fig 1).
DIRECT DRIVE UNITS:
The bushing and key should protrude
from the shaft about 1/2 inch (Fig. 2).
8. Put the 3 bolts into the non-threaded holes and drive them into
the impeller holes evenly. Alternate between the three bolts as you
drive the bolts in. Torque to 40 to 50 lbs/ft. There should be a gap
of 3/8” to 1/2” between the bushing and the impeller.
1. Clean the shaft of any debris and remove any rust using a 120
grit emory cloth.
2. Put a generous coat of anti-sieze compound completely around
the shaft. This will aid in removing the bushing and impeller the
next time.
INSTALLATION
CAUTION:
Before removing the blower housing face
remove the negative battery cable to ensure unit can not
be started.
!
3. Using an overhead crane or other suitable lifting device lift the
impeller on to the shaft. Turn the impeller to align the keyways of
the shaft with the keyway in the impeller.
4. Insert key into the keyway. A light sanding of the keyway may
be needed, as well as a few light blows with a rubber mallet.
5. Apply a generous coat of anti-sieze compound to the outside of
the bushing being sure to cover any area that will come in contact
with the impeller.
IMPORTANT: Use an anti-sieze compound on the shaft
and bushing to keep the bushing from “welding” itself
to the shaft. This makes removal much easier.
9. If the bushing has a set screw on it, tighten the screw snug with
an allen wrench (Fig. 3). This will help keep the key in place.
10. Install the shaft protector on to the shaft (Fig. 4 or 5).
IMPORTANT: Slowly spin the impeller by hand making
sure that the back of the impeller is not hitting any of the
bolt heads located at the back of the blower housing.
Fig. 1
Fig. 2
Fig. 3
Direct
Drive
Belt
Drive
Fig. 4
Fig. 5
Service Section
5.4 IMPELLER INSTALLATION AND REMOVAL; continued,
