Blade Spindle Service - Toro Groundsmaster
4000?D Service Manual

PRELIMINARY – For Toro Distributor and Toro Company use only.

Blade Spindle Service

Disassembly
1. Park machine on a level surface, lower cutting units,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Remove belt covers from top of cutting deck. Loosen
idler pulley to release belt tension. Remove drive belt
from spindle to be serviced.
3. If drive spindle is to be serviced, remove hydraulic
motor from cutting deck (see Cutting Deck Motor Re-
moval in the Service and Repairs Section of Chapter 4
− Hydraulic Systems).
4. Start the engine and raise the cutting unit. Stop en-
gine and remove key from the ignition switch. Latch or
block up the cutting unit so it cannot fall accidentally.
Front deck can be tilted for spindle service.
5. Remove cutting blade, anti−scalp cup and bolt from
spindle to be serviced.
6. For drive spindle assemblies (Fig. 8), remove flange
head screws that secure spindle to deck. Remove
spindle housing assembly with motor mount from deck.
7. For driven spindle assemblies, remove flange head
screws and lock nuts that secure spindle to deck. Re-
move spindle housing assembly from the deck.
8. Loosen and remove lock nut from top of spindle
shaft. Remove washer, pulley and O−ring from spindle.
For drive spindle, remove motor mount.
9. Remove the spindle shaft from the spindle housing
which may require the use of an arbor press. The spacer
should remain on the spindle shaft as the shaft is being
removed.
10.Remove seals from spindle housing.
11. Allow the bearings, inner spacer and spacer ring to
drop out of the spindle housing.
12.Using a punch and hammer, drive both of the bearing
cups out of the spindle housing. Remove the large outer
spacer from the housing.
13.The large snap ring can remain inside the spindle
housing. Removal of snap ring is very difficult.
Cutting Units
130 to 150 ft−lb
(176 to 203 N−m)
4
7
6
14
15
1. Lock nut
2. Washer
3. Pulley (drive shown)
4. Motor mount
5. O−ring
6. Oil seal
7. Bearing set
8. Spacer set (2 piece)
1
3
1
1. Bearing
2. Spacer ring
3. Large snap ring
Page 8 − 10
1
2
13
85 to 110 ft−lb
(115 to 149 N−m)
16
Figure 8
9. Spindle housing
10. Grease fitting
11. Flange head screw
12. Spacer
13. Spindle shaft
14. Blade
15. Anti−scalp cup
16. Blade bolt
4
2
5
Figure 9
4. Inner spacer
5. Outer spacer
Groundsmaster 4000−D
3
5
6
8
9
10
11
12