Use special tool 109-2979 to hold spindle from
rotating. Do Not use the blade bolt to prevent
rotation.
7. Apply a light coat of Mobil HTS grease (or food
grade antiseize) to the top portion of the spindle
shaft where the sheave mounts.
8. Install the double sheave (item 12) onto the right
spindle shaft. Install the spring disc washer and
nut. Make sure that the spring disc washer cone is
installed towards nut (see Figure 13). Torque the
sheave nut to 140-145 ft-lb (190-197 N-m).
Use special tool 109-2979 to hold spindle from
rotating. Do Not use the blade bolt to prevent
rotation.
Figure 13
1.
Sheave nut-torque to 140-145 ft-lb (190-197 N-m)
2.
Spring disc washer (cone towards nut)
3.
Double sheave (item 12)
4.
Special tool 109-2979
9.
Reinstall the blade and torque bolt to:
For units with a 1/2-20 x 2 inch blade bolt,
torque to 50-60 ft-lb (75-81 N-m).
10. Reinstall the deck drive belt in the lower groove of
the double sheave. Install plug (item 40) into bore of
double sheave.
Units Serial Number 600,000 and
Higher:
1. Stop the engine, remove the key, and wait for all
moving parts to stop.
2. 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.
3. Remove the blade from the right spindle.
4. Insert the special tool 109-2979 into splined end of
the spindle shaft.
5. 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.
6. Install the UltraVac drive sheave onto the right
spindle shaft. Install the washer that is supplied with
the UltraVac drive kit (item 38) and the nut removed
in step 5. Torque the sheave nut to: 5/8-18 inch nut
(15/16 Hex) to 90-110 ft-lb (122-149 N-m).
Use special tool 109-2979 to hold spindle from
rotating (see Figure 14). Do Not use the blade
bolt to prevent rotation.
Figure 14
1.
5/8-18 inch Sheave
nut-torque to 90-110 ft-lb
(122-149 N-m)
3.
UltraVac drive sheave
(item 12)
2.
Washer (item 38)
4.
Special tool 109-2979
7. Reinstall blade and torque bolt to:
For units with a 1/2-20 x 2 inch blade bolt,
torque to 50-60 ft-lb (75-81 N-m).
8. Reinstall the deck drive belt in the lower grove of
the double sheave. Install plug (item 40) into bore
of top sheave.
9. Install deflector (item 39) at the front right corner
of deck as shown in Figure 15. Use carriage bolt,
nut and washer that retains right corner of adjustable
front baffle.
11
