Fan, Fan Pulley And Fan Shaft Service - Toro Groundsmaster 300 Series Service Manual

Fan, Fan Pulley and Fan Shaft Service (Fig. 27)
Fan Assembly Removal
1. Park the machine on a level surface, turn engine off,
remove key from switch, and apply the parking brake.
2. Remove five capscrews which secure fan belt guard
and remove guard.
3. Loosen locknut securing idler pulley. Slide pulley to
right to remove tension from fan V-belt and slip belt off
of flywheel and fan pulleys.
4. Use a hoist connected to the two engine hangers to
support the rear of the engine.
IMPORTANT: Position lift chain underneath fan
shaft tube to prevent damage to tube.
NOTE: An alternate method is to put a sturdy board
beneath oil pan and use a floor jack to support engine.
5. Remove two cap screws which pass through rubber
engine mounts. If shims are used between rubber
mounts and metal engine mount (bar), be sure to note
their locations and reinstall them correctly.
6. Remove two cap screws which fasten fan mount to
the rear of engine block. These are located just above
edge of flywheel.
7. Remove four cap screws which secure fan mount to
front of cylinder head, cylinder block and muffler
bracket.
8. Remove fan assembly from machine.
9. Remove cotter pins, slotted nuts, woodruff keys and
washers from ends of the fan shaft. Note number and
placement of washers.
10. Remove pulley from end of shaft (it may be neces­
sary to use a puller).
11. Remove cap screws and lock washers which retain
fan to fan hub. Remove fan hub and woodruff key from
shaft.
NOTE: If bearings or mating tube and shaft surfaces are
not worn or damaged do not disassemble.
12. Press shaft and fan-side bearing from tube by
pressing on belt pulley end of shaft. Inner races of
bearings are pressed onto shaft and fit against shoul­
ders on shaft; both bearings are also pressed into tube
ends.
13. Press remaining bearing from tube by applying
pressure to bearing outer race.
External Engine Component Repair
Fan Assembly Inspection
1. Inspect fan for cracks; replace fan if damaged.
2. Inspect shaft and tube for signs of wear in bearing
areas; replace if bearings are loose and a press-fit is not
possible.
3. Rotate bearings; replace them if they do not rotate
smoothly, or if there is noticeable play in them.
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Groundsmaster 300 Series