Blower Assembly - Ferris FAST-Vac Operator's Manual

Blower Assembly

1. Remove the existing 5/16-18 X 5/8" flange head
bolts (B, Figure 10) from the blower housing (A).
2. Install the blower mount plate (C) onto the blower
housing and re-install the 5/16-18 X 5/8" flange
head bolts. Tighten securely.
3. Install three (3) 3/8-16 X 1" bolts and nylon lock
nuts (D) through the blower mount plate and
blower. The bolt heads must be installed on the
inside of the blower housing.
4. Loop the idler spring (A, Figure 11) through the
1/4" X 2" eyebolt (B). Install the eyebolt through
the L-bracket on the blower mount and install the
1/4-20 nylock flange nut (C). Tigthen the nut until
the eyebolt contacts the L-bracket.
5. Remove the blower belt guard and set aside.
6. Install the impeller drive pulley (A, Figure 12) onto
the impeller drive shaft (B) as described in Figure
12. Install the 1/4" X 1-1/2" long key (not shown)
into the pulley.
7. Align the pulley groove with the appropriate slot as
described in Figure 12. Tighten the set screws in
the pulley.
8. Re-position the 3/8-16 X 6" bolt, if required to line
up with the pulley groove.
9. Check the position on the idler pulley (A, Figure
13). The position must be aligned with the position
of the impeller drive pulley (outer row of holes for
pulley hub pointing in, inner row of holes for pulley
hub pointing out). Reposition if necessary.
Hub pointing IN:
48" Models
B
Inner Slot
Figure 12. Install Impeller Drive Pulley
A. Impeller Drive Pulley
B. Impeller Drive Shaft
Hub pointing OUT:
52" Models
A
Outer Slot
Align pulley groove
with slot (outer slot
with pulley hub in
OR inner slot with
pulley hub out)
A
B
Figure 10. Install Blower Mount Plate
A. Blower Housing
B. 5/16-18 x 5/8" Bolts (existing)
C. Blower Mount Plate
D. 3/8-16 x 1" Bolts & Nylon Lock Nuts (3X)
B
A
Figure 11. Install Idler Spring
A. Idler Spring
B. 1/4" x 2" Eyebolt
C. 1/4-20 Nylock Flange Nut
Outer Row
A
Figure 13. Check Idler Pulley Position
A. Idler Pulley
Installation
B
C
D
C
Inner Row
11