ADJUSTMENTS & MAINTENANCE
45
ALIGNMENT AND ADJUSTMENT OF THE
SPEED REDUCER - FIGURE 76
CAUTION: The speed reducer is inserted on the
blower shaft (3” (76 mm) deep). The shaft is hold-
ing the entire speed reducer weight. If you want
to remove the speed reducer, you will need a lift-
ing device to lift it.
NOTE:
Each time the blower fan must be adjusted, the
speed reducer must be realigned to be perpen-
dicular to the fan shaft.
To align the speed reducer follow carefully the following
instructions:
1. Remove the driveline (item 1).
2. Remove the guard (item 15)
3. Unscrew the four nuts (item 3) of the support (item 4)
of the speed reducer (item 5).
4.
Unscrew the two bolts (item 6) and remove the flat
bar (item 7) of the lower support (item 8).
5. Slide the speed reducer (item 5) back on the fan
(item 9) by pulling it slowly until the flange bearing
bolts (item 10) are free.
6. Check if the fan adjustment is correct (see Figure 45
on page 29).
7. Slide the speed reducer on the fan shaft by push-
ing it slightly against the flange bearing nuts. Check
spacings between the speed reducer support (item
4) and the flange bearing nuts (item 13). Install the
spacing washers (item 12) as required.
8. If necessary repeat steps 5 and 7 until the speed
reducer is resting perfectly on the four flange bearing
nuts without spacings. Put back the four nuts (item
3).
9.
Reinstall the flat bar (item 7) and bolts (item 6). Check
for zero clearance between item 8 and item 16. Ad-
justment is made by adding or removing washers
between the support (item 8) and the speed reducer.
Tighten well all nuts.
10. Put driveline (item 1) and guard (item 2) back in
place.
NOTE:
This adjustment is very important to avoid fan
shaft bending which could lead to shaft shearing.
Figure 76 Alignment and adjustment of the speed reducer
Manual no. S5516E970
E
V1.1