Toro ProForce 44538 Service Manual page 63

6. Remove nut(s) that secures rotor assembly:
A. On machines with serial numbers below
310000000 (Fig. 4), remove outer nut from rotor
shaft by rotating nut in a clockwise direction. Then,
remove inner nut by rotating nut clockwise. Use off-
set wrench (see Special Tools) to loosen nuts from
rotor shaft.
B. On machines with serial numbers above
310000000 (Fig. 5), straighten inner tab washer to
allow removal of nut. Remove nut from rotor shaft by
rotating nut in a clockwise direction. Remove two (2)
tab washers from rotor shaft.
NOTE: Washers (item 12) are used to prevent rotor
from contacting rotor housing assembly. Typically, two
(2) washers are required.
7. Slide spacer (item 6), rotor assembly and washer(s)
(item 12) from shaft. Locate and retrieve woodruff key.
8. Remove rotor assembly from rotor shaft.
NOTE: Component parts for the rotor assembly are not
available. If rotor damage exists, replace complete rotor
assembly.
Installation (Fig. 4)
1. Position woodruff key in slot in rotor shaft. Slide
washer(s) (item 12), rotor assembly and then spacer
(item 6) onto shaft. Make sure that rotor does not contact
rotor housing. If necessary, add additional washer(s) to
allow proper clearance.
IMPORTANT: The nuts used to secure the rotor as-
sembly to the rotor shaft have left hand threads.
Tighten these nuts by rotating counter- -clockwise.
NOTE: When installing nuts that secures rotor assem-
bly to shaft, use a 1 1/4" wrench in flats on shaft to pre-
vent the shaft from turning.
2. On machines with serial numbers below 310000000
(Fig. 4), secure rotor assembly to rotor shaft as follows:
A. Clean rotor shaft threads with brake parts cleaner
or similar non--oily cleaner and allow to dry. After
cleaner dries completely, apply Loctite Primer N (or
equivalent) to shaft threads. Allow primer to dry com-
pletely.
B. Apply Loctite #242 (or equivalent) to threads of
rotor shaft.
C. While holding rotor shaft with a 1 1/4" wrench in
flats on shaft to prevent the shaft from turning, install
inner nut and torque with offset wrench (see Special
Tools) from 50 to 60 ft- -lb (68 to 81 N- -m) to secure
rotor assembly on shaft.
ProForce Debris Blower
SERIAL NUMBER ABOVE 310000000
190 to 210 ft- -lb
(258 to 284 N- -m)
4
3
2
1
1. Retaining ring
2. Wave washer
3. Front cap
4. Nut (LH threads)
5. Inner tab washer
6. Outer tab washer
D. Apply Loctite #242 (or equivalent) to exposed
threads of rotor shaft.
E. While holding inner nut with offset wrench (see
Special Tools) to prevent it from turning, install and
torque outer nut with second offset wrench from 190
to 210 ft- -lb (258 to 284 N- -m).
3. On machines with serial numbers above 310000000
(Fig. 5), secure rotor assembly to rotor shaft as follows:
A. Slide inner tab washer (larger OD) and then outer
tab washer onto rotor shaft.
B. While holding rotor shaft with a 1 1/4" wrench in
flats on shaft to prevent the shaft from turning, install
nut and torque with offset wrench (see Special Tools)
from 190 to 210 ft- -lb (258 to 284 N- -m).
C. Bend inner tab washer over flat of nut.
4. Install front cap (item 4), wave washer(s) (item 3) and
retaining ring (item 2) onto shaft. Up to three (3) wave
washers might be necessary to secure front cap.
5. Install blower drive shaft (see Blower Drive Shaft
Installation in this section).
6. Install top grill to machine (see Guards Installation in
the Service and Repairs section of Chapter 6 -- Chas-
sis).
7. Connect negative battery cable to negative battery
terminal. Tighten nut that secures battery cable from 10
to 15 ft- -lb (14 to 20 N- -m). Make sure that battery cover
is secured.
Rev. B
Page 5 - - 7
11
9
10
8
7
6
5
Figure 5
7. Spacer
8. Rotor assembly
9. Washer (as needed)
10. Woodruff key
11. Rotor shaft
Blower Assembly