Toro Multi Pro 1200 - Page 177

Multi Pro 1200/1250 Page 7 -- 15 Drive Train
Inspection
NOTE: Ifdriveclutchwearordamageoccurs,clutchre-
placement may be necessary. Refer to your parts cata-
log to identify individual drive clutch components that
are available.
1. Inspect the tapered ends of the engine crankshaft
and fixed sheave of drive clutch. If either is severely
damaged, replace component as damage to the taper
willallowlooseningofthe clutch during machine opera-
tion.
2. Inspect thecompressionspring (item 2)andreplace
if damaged or fatigued.
3. Clean and inspect shoulder screws (item 9). If the
shoulderareaofthescrewsiswornor if the threadsare
damaged, replace the screws.
4. Checkthecontactsurfaceofthe clutchweights(Fig.
13). If surface is worn or damaged, replace all three (3)
clutch weights as a set.
5. Check the rollers in the s pider assembly for binding
orwear(Fig.14).If binding or uneven wear is found, re-
place clutch assembly.
6. Checkthecontactsurfaceofthemovables heavefor
wear and/or fraying. If surface is worn/frayed, replace
clutch assembly.
Assembly (Fig. 11)
IMPORTANT: For proper drive clutch operation, DO
NOT lubricate drive clutch components.
IMPORTANT: To maintain the balance of the clutch,
all shoulder screws must be installed with their
threads pointing in a clockwise direction (Fig. 15).
1. Position clutch weights to moveable sheave and
slideshoulderscrewintosheaveandweight.Makesure
that shoulder screw threads are pointing in a clockwise
direction.
2. Install new lock nuts on the shoulder screws. DO
NOT reuse removed lock nuts. Tighten nuts until they
contactscrew shoulder and then torque nutsfrom40 to
50 in--lb (4.6 to 5.6 N--m).
3. Position compression spring and cover to clutch.
Make sure that the “X” mark cast into the cover and spi-
der are aligned.
4. Secure cover to the movable sheave with six (6)
flangeheadscrewsinacrossingpatternandinthree(3)
steps.Finaltorqueonscrewsshouldbefrom105to120
in--lb (11.9 to 13.5 N--m).
1. Clutch weight 2. Contact surface
Figure 13
2
1
1. Roller
2. Weight contact surface
3. Roller uneven wear
Figure 14
2
1
3
1. Shoulder screw 2. Lock nut
Figure 15
2
1
1
1
2
2
Drive Train