Toro Multi Pro 1750 Service Manual page 174

The pump drive electric clutch used on the Multi Pro has
sealed, non−serviceable bearings. If clutch bearing fail-
ure occurs, clutch replacement is necessary.
Removal (Fig. 97)
1. Park machine on a level surface, stop spray pump,
stop engine and engage parking brake. Remove key
from ignition switch.
2. Loosen idler pulley flange nut (item 2) and turn ad-
justing screw (item 3) counterclockwise to relieve drive
belt tension. Remove spray pump drive belt from pump
pulley.
3. Remove four (4) cap screws (item 4) and lock wash-
ers that secure pump sprocket to electric clutch. Re-
move pump sprocket from clutch.
4. Unplug machine wire harness connector from clutch
terminals.
5. Remove cap screw (item 7), lock washer and clutch
spacer (item 9) that secure electric clutch to spray pump
shaft.
6. Slide electric clutch from pump shaft and anchor
stud.
7. If necessary, remove spacer (item 11) from pump
shaft. Inspect spacer and retaining ring for wear and re-
place if necessary.
Electrical System
Installation (Fig. 97)
1. Apply antiseize lubricant to pump input shaft. Make
sure that retaining ring on pump shaft is fully seated in
shaft groove.
2. If spacer (item 11) was removed from pump shaft,
slide spacer onto pump shaft. Make sure that spacer
groove fits around retaining ring on pump shaft.
3. Align key in clutch with key slot in pump shaft and
align mounting slot of clutch to anchor stud on idler
bracket. Slide clutch onto gearbox shaft making sure
that anchor stud is positioned in slot of clutch.
4. Apply medium strength thread locker (ie. Loctite
#242) to threads of cap screw (item 7). Install cap screw,
lock washer and clutch spacer (item 9) to secure clutch
to pump shaft. Torque screw from 31 to 39 ft−lb (43 to
52 N−m).
5. Attach machine wire harness connector to clutch ter-
minals.
6. Apply medium strength thread locker (ie. Loctite
#242) to threads of cap screws (item 4). Position pump
sprocket to clutch and secure with four (4) cap screws
and lock washers. Torque screws from 90 to 110 in−lb
(10.2 to 12.4 N−m).
7. Install drive belt over sprockets and under idler pul-
ley. Adjust drive belt tension (see Adjust Spray Pump
Drive Belt in Chapter 6 − Spray System in this manual).
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Multi Pro 1750