Toro Groundsmaster 300 Series Service Manual page 394

Installing Gearbox and Drive Pulley
1. Install isolation mounts (Item 3) into brackets (Item 7,
13). Use water or lubricant to ease installation. Install
mounts from bottom of bracket.
2. Install bracket on each side of gearbox with cap-
screws and lockwashers. Tighten capscrews to a torque
of 20 - 26 ft-lb.
3. Install gearbox with brackets to gear box mount plate
(Item 10).
4. To install pulley (Item 17), slide taper lock (Item 18),
small end first, into pulley hub.
5. Insert woodruff key into keyway in gearbox shaft.
Slide pulley with taper lock onto gearbox shaft while
aligning key and keyway.
NOTE: Large hub on pulley must face away from gear-
box, and like the taper lock, the pulley must contact
shoulder on the gearbox shaft.
6. Rotate pulley to get non-threaded holes in taper lock
to line up with the two threaded holes in hub of gearbox
pulley. Start threading set screws (Item 19) into the two
holes and tighten them alternately and evenly until both
set screws are tight.
Repairs
7. Using a brass drift pin or sleeve and a hammer, hit
taper lock firmly. Now tighten set screws to 55 in-lb.
Continue to hit taper lock and tighten set screws until
55 in-lb of torque will not turn the set screws.
8. Check alignment of gearbox with a spindle pulley.
Loosen and relocate taper lock to adjust, if necessary.
9. Fill recessed socket head in each setscrew, and other
taper lock holes, with grease to prevent dirt from packing
into holes.
10. Install gear box plate on deck channels while routing
belt around gear box pulley. Mount gear box plate to
deck channels with capscrews and nuts.
11. Install idler arm bracket to idler arm with cotter pin
and clevis pin. Hook spring onto idler arm bracket. To
make sure there is proper belt tension on drive belt,
spring should be extended to a length of approximately
7.00 inches. If spring is not extended to this length,
move spring rod to other mounting holes further away
from belt.
12. Install belt covers. Install drive shaft to gear box and
secure with a new roll pin.
13. Remove gear box fill plug and check plug. Add SAE
80W90 API GL-5 gear lube until level is to bottom of
check plug hole. Install plugs in gear box.
Figure 26
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Groundsmaster 300 Series