Toro Workman 3000 Series, Руководство по обслуживанию

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Rev. C
Workman 3000/4000 Series Page 6 -- 21 Drive Train
Clutch Disassembly and Inspection (Fig. 20)
1. Insert clutch alignment tool (see Special Tools) in fly-
wheel pilot bearing hole to keep clutch disk from falling
off (Fig. 21).
2. Loosen pressure plate screws (Item 10) in a diagonal
sequence.
3. Remove cap screws, washers (Item 11) and pres-
sure plate (Item 12), then slide out the transaxle main
shaft and remove clutch disk (Item 13). Note orientation
of clutch disk as it is removed (Fig. 22).
4. 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).
5. Check pressure plate surface for wear, cracks and
color change.
6. Check strap plate rivets for looseness and replace
pressure plate if loose.
7. Check clutch disk facing for loose rivets, uneven con-
tact, deterioration due to seizure, adhesion of oil or
grease. Replace clutch disk if damaged.
8. Measure rivet sink and replace clutch disk if out of
specification (Fig. 24).
Clutch disk thickness
standard value
0.307 to 0.339 in. (7.8 to 8.6
mm)
Clutch disk rivet sink 0.012 in. (0.3 mm) minimum
9. Check for torsion spring play or damage. Replace
clutch disk if necessary.
10.Install clutch disk on transaxle main shaft. Make sure
clutch slides freely on splines of shaft. Check for exces-
sive play in rotating direction.
11.Inspect flywheel surface for stepped wear, streaking
or seizure. Replace if necessary. Clean any oil or rust
from flywheel surface with light abrasive. Check flywheel
runout and replace if runout exceeds 0.005 in. (0.13
mm).
12.Inspect flywheel pilot bearing for wear or damage
and replace if necessary.
Installing Clutch Disk and Pressure Plate
1. Apply a coating of grease to clutch disk spline, then
use a brush to rub it in. Wipe off any excess grease.
2. Use clutch alignment tool (see Special Tools) to posi-
tion clutch disk on flywheel.
3. Install pressure plate. Install and tighten six cap
screws and lock washers a little at a time, working in a
diagonal sequence. Torque screws from 5 to 7 ft--lb (7 to
9 N--m). Remove alignment tool from flywheel bearing.
Clutch Alignment Tool
Figure 21
Pressure
Engine
Plate Side
Flywheel
Side
Clutch Disc
Figure 22
Torsion spring
Pressure plate
Diaphragm spring
Figure 23
Rivet sink
Figure 24
Drive
Train