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109-4232 Rev. A
Units SN 600,000 and Lower With Splined Blade
Driver:
9. Lower the deck fully. Remove the right hand belt
cover. Remove the belt cover mounting stud that
protrudes from the deck.
10. Remove the right side belt shield and the
5/16 x 3 1/4 bolt that secures the shield to the
deck.
11. Remove the blade from the right spindle.
12. Insert special tool 109-2979 into splined end of
spindle shaft.
13. Remove the right sheave nut, spring disk washer,
and drive sheave from the spindle shaft– keep
hardware for re-use.
Use special tool 109-2979 to hold spindle from
rotating. Do not use the blade bolt to prevent
rotation.
14. Apply a light coat of Mobil HTS grease (or food
grade antiseize) to the top portion of the spindle
shaft where the sheave mounts.
15. Install the double sheave (Item 12) onto the right
spindle shaft. Install the spring disk washer and
nut. Make sure that the spring disk washer cone
is installed towards nut (See Figure 8). Torque
the sheave nut to 140-145 ft-lbs.
Use special tool 109-2979 to hold spindle from
rotating. Do not use the blade bolt to prevent
rotation.
FIGURE 8
Reinstall blade and torque bolt to:
For units with a 1/2-20x2 blade bolt, torque to
50-60 ft-lbs (75-81 N-m)
16. Reinstall the deck drive belt in the lower groove of
the double sheave. Install plug (Item 40) into
bore of double sheave.
17. Remove the discharge chute from the deck.
Discard the mounting hardware, but save the
discharge chute for use during side discharge
operation. The chute pivot pin (Item 21) and
hairpin (Item 22) may be stored in the pivot
holes on the discharge chute during bagging
operation.
Units 600,000 and Higher:
18. Lower the deck fully. Remove the right hand
belt cover. Remove the belt cover mounting
stud that protrudes from the deck. Save the
knob for later use.
19. Remove the blade from the right spindle.
20. Insert special tool 109-2979 into splined end
of spindle shaft.
21. Remove the right sheave nyloc nut, washer,
and splined washer from the spindle shaft.
Do not remove the blade drive sheave. Retain
the nut for later use.
Use special tool 109-2979 to hold spindle
from rotating. Do not use the blade bolt to
prevent rotation.
22. Install the Ultra Vac drive sheave onto the
right spindle shaft. Install the washer that is
supplied with the Ultra Vac drive kit (Item 47)
and nut removed in step 4. Torque the
sheave nut to: 5/8-18 Nut (15/16 Hex)
90-110 ft-lbs.
Use special tool 109-2979 to hole spindle
from rotating
(See Figure 9). Do not use
the blade bolt to prevent rotation.
FIGURE 9
Reinstall blade and torque bolt to: For
units with a 1/2-20x2 blade bolt, torque to
50-60 ft-lbs (75-81 N-m).
23. Reinstall the deck drive belt in the lower
grove of the double sheave. Install plug
(Item 40) into bore of top sheave.
RELEASED Version ©Toro 2006-2007
