Toro Multi Pro 1750 Service Manual page 46

Inspection
1. Inspect diaphragm spring end of pressure plate for
wear and uneven height. Replace if wear is evident or
if height difference exceeds 0.020 in. (0.5 mm).
2. Check pressure plate surface for wear, cracks or col-
or change.
3. Check strap plate rivets for looseness. Replace
pressure plate if rivets are loose.
4. Check clutch disk facing for loose rivets, uneven
contact, deterioration due to seizure and lubricant con-
tamination. Replace clutch disk if damaged.
5. Measure rivet sink and replace clutch disk if out of
specification (Fig. 20).
Clutch disk thickness
Clutch disk rivet sink
6. Check for torsion spring play or damage. Replace
clutch disk if necessary.
7. Install clutch disk on output shaft. Make sure clutch
slides freely on splines of shaft. Check clutch and output
shaft splines for excessive play in rotating direction.
8. Inspect flywheel surface for stepped wear, streaking
or seizure. Replace if necessary. Clean any oil or rust
from flywheel surface with light abrasive. Check fly-
wheel runout and replace if runout exceeds 0.005 in.
(0.13 mm).
Installation (Fig. 18)
1. If previously removed, secure adapter plate (item 1)
to engine with four (4) hex head screws, lock washers,
and flat washers. Tighten screws from 45 to 55 ft−lbs
(61 to 75 N−m).
2. If previously removed, clean engine shaft, woodruff
key, and flywheel bore thoroughly with solvent and fit
key and flywheel on engine shaft. Apply heavy duty
thread locking compound (ie. loctite 271) to button head
screw (item 9) and install washer and button head
screw. Tighten screw from 35 to 40 ft−lbs (47 to 54
N−m).
3. Install new pilot bearing (item 10) in flywheel.
4. Thoroughly clean clutch contact surface of flywheel
and pressure plate with solvent.
Kohler Gasoline Engine
0.307 to 0.339 in.
(7.8 to 8.6 mm)
0.012 in.
(0.3 mm) minimum
Page 3 − 28
Figure 20
CLUTCH DISC
ENGINE
FLYWHEEL
SIDE
Figure 21
5. Position clutch disc with flat side against flywheel
(Fig. 21). Position pressure plate assembly over align-
ment pins in flywheel. Use clutch alignment too (see
Special Tools in this chapter) and center clutch disc over
pilot bearing. Secure pressure plate assembly to fly-
wheel with six (6) hex head screws and lock washers.
Tighten screws from 17 to 21 ft−lbs (23 to 28 N−m) and
remove clutch alignment tool.
6. Align output shaft with splines in clutch disc and in-
stall bell housing assembly over alignment pins in
adapter plate (item 2). Fit the clutch cable bracket and
R−clamp under the mounting screws and secure bell
housing to adapter plate with six (6) hex head screws.
Tighten screws from 55 to 65 ft−lbs (75 to 88 N−m).
7. Install clutch cable to bracket on clutch housing
(Fig. 19). Set bulkhead nuts so an equal amount of ca-
ble housing thread appears on each side of the cable
bracket and tighten bulkhead nuts. Install ball joint to
throwout lever with lock nut and tighten. Install return
spring. Adjust clutch cable (see Clutch Cable Adjust-
ment in this chapter).
8. Install transaxle drive shaft to engine (see Transaxle
Drive Shaft in Chapter 7 − Drive Train in this manual).
9. Install exhaust system (see Exhaust System in this
chapter).
RIVET
SINK
PRESSURE
PLATE
SIDE
Multi Pro 1750