Toro Groundsmaster 300 Series Service Manual page 57

Fan Assembly Installation
1. Clean inside of pulley end of tube and outside diame -
ter of pulley end bearing. Apply Loctite #609 (or equiva-
lent) to outside diameter of bearing and press bearing
into pulley end of tube.
2. Insert shaft through tube and into installed bearing.
Support inner race of bearing as shaft is being installed
into bearing.
3. Position second bearing (no Loctite on this bearing)
onto fan end of shaft. Press bearing into tube.
4. Position woodruff key in fan shaft and slide pulley
onto shaft. Fit flat washer and shim washer(s) to shaft
and install slotted hex nut. Torque nut from 50 to 70 ft–lb
(68 to 94 N–m).
5. Position woodruff key in fan shaft and slide fan hub
onto shaft. Install fan to fan hub with cap screws and
lock washers. Fit flat washer and shim washer(s) to
shaft and install slotted hex nut. Torque nut from 50 to
70 ft–lb (68 to 94 N–m).
IMPORTANT: If hex nut slot and cotter pin shaft
hole do not align after applying correct torque to
slotted hex nut, remove nut and add shim washers
until alignment is correct. DO NOT loosen nut to
align the slot and hole.
6. Install new cotter pins through slotted nut and fan
shaft to retain both pulley and fan hub.
7. Reinstall fan assembly onto engine by performing re -
moval steps 1 through 8 in reverse order.
Groundsmaster 300 Series
4
3
2
1
1. Slotted hex nut
2. Cotter pin
3. Flat washer
4. Fan shaft
External Engine Component Repair
Page 4 – 28.1
Rev. D
6 7
5
Figure 1
5. Woodruff key
6. Fan hub
7. Bearing
8. Shim washer
8 1
3
7
2