Toro 74282 Parts Catalogue

Form Number 3358-985 Rev A

Z550 Z Master

With 52in TURBO FORCE

Model No. 74282 - 280000001 and up.

Parts Catalog

®

®

Side Discharge Mower

Ordering Replacement Parts

To order replacement parts, please supply the part
number, the quantity, and the description of each part
desired.

Understanding Reference Numbers

Each Identified part in an illustration has a reference
number. The reference number for a part also
appears in the parts list, along with other information
about the part.

This catalog uses two special reference number
formats, one to indicate parts in a service assembly
and another to indicate the quantity of a given part in
an illustration.

Service Assembly Reference Numbers

Parts in service assemblies have reference numbers
in the form a:b. The a represents the reference
number of the entire service assembly and the b
represents a sequential number unique to each part
within the service assembly.

© The Toro Company - 2007

Register your product at www.Toro.com

All Rights Reserved

For example, a wheel assembly might be identified
by reference number 6, the tire by 6:1, the valve by
6:2, and the wheel by 6:3. When you order the
assembly identified by reference number 6, you
receive all parts identified by reference numbers 6:1,
6:2, and 6:3. However, you may also order any part
individually. Reference numbers of this type appear
in illustrations and in part lists.

Reference Numbers Indicating Quantity

In an illustration, if a reference number indicates
more than one part, the reference number has the
form nX y. The n represents the quantity of the part,
the X is the multiplication symbol, and the y
represents the reference number.

For example, in an illustration, the reference number
2X 37 means that two of the parts identified by
reference number 37 are indicated.

Contents

Description Page

. . . . . . 3Front Frame Assembly

. . . . . . 5Caster Wheel and Fork Assembly

. . . . . . 6Main Frame and Rear Wheel Assembly

. . . . . . 7Brake and Wheel Hub Assembly

. . . . . . 8Steering Control Assembly

. . . . . . 9LH Motion Control Assembly No. 109-3906

. . . . . . 10RH Motion Control Assembly No. 109-3707

. . . . . . 11Hydraulic Assembly

. . . . . . 13Pump Idler Assembly No. 103-5679

Seat and Roll-Over Protection System
Assembly

Roll-Over Protection System Assembly No.
108-1097

. . . . . . 14

. . . . . . 15Seat and Bracket Assembly No. 110-0446

. . . . . . 16

. . . . . . 17Deck Connection Assembly

. . . . . . 18Deck Assembly

. . . . . . 20Spindle Assembly No. 108-7713

. . . . . . 21Deck Decal Assembly No. 107-1623

. . . . . . 22Rubber Deflector Assembly No. 108-2792

. . . . . . 23Lever Assembly No. 107-1664

. . . . . . 24Drive Idler Assembly

. . . . . . 25Engine and Clutch Assembly

Description Page

. . . . . . 26Muffler and Guard Assembly

. . . . . . 27Fuel Tank Assembly

. . . . . . 28Electrical Assembly

. . . . . . 29Crankshaft Assembly Kohler CH740 0075

. . . . . . 30Crankcase Assembly Kohler CH740 0075

Oil Pan / Lubrication Assembly Kohler CH740
0075

Head / Valve / Breather Assembly Kohler
CH740 0075

Ignition / Electrical Assembly Kohler CH740
0075

Blower Housing and Baffle Assembly Kohler
CH740 0075

Air Intake / Filtration Assembly Kohler CH740
0075

. . . . . . 31

. . . . . . 32

. . . . . . 33

. . . . . . 34

. . . . . . 35Starting System Assembly Kohler CH740 0075

. . . . . . 36Fuel System Assembly Kohler CH740 0075

. . . . . . 37Engine Control Assembly Kohler CH740 0075

. . . . . . 38

. . . . . . 39Exhaust Assembly Kohler CH740 0075

. . . . . . 40Decals Kohler CH740 0075

. . . . . . 41Attachments and Accessories List

Part Description Abbreviations

Part descriptions in this catalog may include the following abbreviations.

AR. . . . . . . . . . . . . . .as required

ASM. . . . . . . . . . . . . assembly

BBC. . . . . . . . . . . . . blade brake clutch

CARR. . . . . . . . . . . . carriage

DEG. . . . . . . . . . . . . degrees

EXT. . . . . . . . . . . . . .external

FH. . . . . . . . . . . . . . .flat head

GA. . . . . . . . . . . . . . .gauge

HD. . . . . . . . . . . . . . .heavy-duty

HF. . . . . . . . . . . . . . . hex flange

HH. . . . . . . . . . . . . . .hex head

HHF. . . . . . . . . . . . . hex head flange

HHFTF. . . . . . . . . . . hex head flange thread forming

HJ. . . . . . . . . . . . . . . hex jam

HLH. . . . . . . . . . . . . .hex lag head

HOC. . . . . . . . . . . . . height-of-cut

HSBH. . . . . . . . . . . . hex socket button head

HSFH. . . . . . . . . . . . hex socket flat head

HSH. . . . . . . . . . . . . hex socket head

HWH. . . . . . . . . . . . . hex washer head

HWHTF. . . . . . . . . . .hex washer head thread

forming

HYD. . . . . . . . . . . . . hydraulic

LH. . . . . . . . . . . . . . . left hand

NI. . . . . . . . . . . . . . . nylon insert

NPTF. . . . . . . . . . . . national pipe thread fine

PFH. . . . . . . . . . . . . .phillips flat head

PPH. . . . . . . . . . . . . phillips pan head

PPHTF. . . . . . . . . . . phillips pan head thread

PRH. . . . . . . . . . . . . phillips round head

PTH. . . . . . . . . . . . . .phillips truss head

PTO. . . . . . . . . . . . . power-take-off

RH. . . . . . . . . . . . . . .right hand

ROPS. . . . . . . . . . . . roll-over protection system

SFH. . . . . . . . . . . . . .slotted fillister head

SHH. . . . . . . . . . . . . slotted hex head

SHWH. . . . . . . . . . . .slotted hex washer head

SPH. . . . . . . . . . . . . slotted pan head

SQH. . . . . . . . . . . . . square head

SRH. . . . . . . . . . . . . slotted round head

STD. . . . . . . . . . . . . .standard

TAP. . . . . . . . . . . . . .self tapping

TTH. . . . . . . . . . . . . .torx truss head

forming

Footnotes

n

Not illustrated

p

Obtain from your local Kohler dealer

o

Not serviced separately

2

3358-985 Rev A

Ref Part No. Qty. Description

Frame ASM1

106-8978
107-1857
1-811010
302-19
103-1918
106-9981
106-7451
107-2112
103-1918
110-5860
1-633295
103-2083
103-2064
1-633325
3296-39
3256-24
3296-39
32151-103
1-633068
323-29
110-0833
107-1860
110-0834
107-1861

1

Decal-Brake, Parking1:2

1

Plug1:3

2

Fitting-Grease1:4

5

Bushing1:5

1

Footrest3

1

Decal3:2

1

Decal-Warning3:3

1

Bushing4

1

Deck Lift Handle ASM5

1

Grip-Lever, Lift5:1

1

Lever-Lift5:2

1

Arm-Lift, Deck5:3

1

Spring-Compression5:4

1

Nut-Lock, NI5:5

1

Washer-Flat5:6

1

Nut-Lock, NI10

8

Ring-Snap11

5

Arm-Lift, Deck12

2

Screw-HH14

2

Plate-Deck Lift, Outer15

1

Decal-Height, Deck15:2

1

Plate-Deck Lift, Inner16

1

Decal-Height, Deck16:2

1

Front Frame Assembly

Ref Part No. Qty. Description

1-633082
1-633080
323-13
106-9951
323-9
98-5975
3290-357
323-6
323-7
3256-29

o

1-633096
1-633441
3217-11
3218-6
3256-7
1-633064
3274-94
108-7786-01
106-8984-01
1-523157
32151-29
3274-18
3218-2

12
15

12

1

Bushing-Lever, Lift17
Bushing-Lever, Lift18

1

Screw-HH19

1

Hitch Pin ASM20

1

Screw-HH22

2

Washer-Belleville23
Nut-HHF, Whiz24
Screw-HH25

1

Screw-HH26
Washer-Flat27

4

Front Frame Spring ASM35

2

Rod-Lift, Deck35:1

1

Swivel-Deck Mount, Rear35:2

2

Nut-Hex35:3

4

Nut-Jam35:4

2

Washer-Flat35:5

2

Spring-Support, Deck35:6

1

Screw-HSBH38

4

RH Front Deck Lift ASM40

1

LH Deck Lift ASM41

1

Washer-Spacer42

2

Ring-Retaining43

2

Screw-HSH44

2

Nut-Jam45

2

3

3358-985 Rev A

2

Front Frame Assembly (continued)

Ref Part No. Qty. Description

Bumper46

1-513658

2

4

3

3358-985 Rev A

Caster Wheel and Fork Assembly

Ref Part No. Qty. Description

Cap-Grease1

2

Nut-Lock, NI2

2

Washer-Bellville3

6

Bearing-Cone, Tapered4

4

Bearing-Cup, Tapered5

4

Caster Wheel Bearing Kit6

1

Spacer-Bearing6:1

2

Seal-Bearing6:2

2

Bearing-Cup6:3

2

Bearing-Cone, Taper6:4

2

Seal-Grease7

2

Caster8

2

Castor Wheel ASM11

2

Seal-Bearing11:1

2

Spacer-Bearing11:2

2

Bearing-Cone, Taper11:3

2

Spacer-Caster, Front11:4

1

Wheel And Tire ASM (Semi-

1

Pneumatic)
Bearing-Cup11:5:3

1

Screw-HH11:6

1

Nut-Lock, NI11:7

1

Guard-Seal23

4

11:5

103-4882
3296-51
1-633508
254-94
254-72
110-8837
1-633581
1-633580
1-633584
1-633585
1-543511
1-642111-01
110-5746
1-633580
1-633581
1-633585
1-633959
110-5744

1-633584
325-24
3296-45
103-2768

5

3358-985 Rev A

4

Main Frame and Rear Wheel Assembly

Ref Part No. Qty. Description

Stop-Brake, Park1

1-633964-03
322-43
323-6
114-1509
107-8076
1-653010
1-653160
1-653158
232-27
107-1858
98-4387
107-1864
242-50
3296-39
1-513762
1-303335
321-4
32128-33
3256-70
106-7498
106-7488-03
106-7489-03
323-20
3296-59

6

1

Screw-HH4

6

Screw-HH5

2

Frame W/Decals ASM11

1

Decal-Console, Top11:1

1

Wheel And Tire ASM12

2

Tire12:1

1

Wheel12:2

1

Stem-Valve12:3

1

Floorpan13

1

Decal-Protection, Ear13:2

1

Decal-Location, Manual13:3

1

Nut-Lug15

8

Nut-Lock, NI21

2

Clip-Loom24

1

Tie-Plastic25

2

Screw-HH27

3

Nut-HF28

1

Washer-Flat44

6

Pocket47

1

Hinge-Floorpan, LH48

1

Hinge-Floorpan, RH49

1

Screw-HH50

2

Nut-Lock, NI51

2

Ref Part No. Qty. Description

4

3296-42
3256-63
3258-166
106-9989
106-7492
107-1865
104-7050
104-7048
109-7949

Nut-Lock, NI52
Washer-Flat53

2

Screw-PRH54

2

Decal-Warning55

1

Decal-Danger56

1

R-Clamp57

2

Housing-Manual58

1

Cap-Housing59

1

Decal-Wheel Hub, Slotted Nut61

2

5

3358-985 Rev A

Brake and Wheel Hub Assembly

Ref Part No. Qty. Description

Bearing-Control1

1-513140
1-633454
103-4332
1-633131
1-633477
3219-3
1-634500
1-633268
1-632217-03
103-0352-03
1-523157
103-0355
1-633380
1-633382
1-633102
103-4333
1-633131
1-633477
3219-3
1-633144
103-0590
103-0589
1-633926
323-4

2

Spring-Brake2

2

Brake Rod And Yoke ASM3

1

Yoke-Linkage, Brake3:1

2

Rod-Brake3:2

1

Nut-Hex3:3

2

Brake Lever ASM4

1

Grip-Lever, Brake4:2

1

Shaft-Brake5

1

Bracket-Brake6

2

Washer-Spacer7

2

Band-Brake9

2

Spacer-Wheel, Short10

4

Spacer-Wheel, Long11

4

Bearing-Flange, Side12

2

Brake Rod And Yoke ASM13

2

Yoke-Linkage, Brake13:1

1

Rod-Brake13:2

1

Nut-Hex13:3

1

Pin-Trunion14

2

Hub And Wheel ASM15

2

Wheel Hub ASM15:1

1

Stud-Wheel15:2

4

Screw-HH18

4

Ref Part No. Qty. Description

3

103-2399
325-17
1481
109-5618
3219-3
3290-357
3256-4
3272-10
1-806800
322-9
103-0384
103-0374
1-808285

Pin-Spring, Clevis19
Screw-HH20

8

Fitting-Grease21

2

Nut,Square Special22

8

Nut-Hex23

4

Nut-HHF, Whiz24

4

Washer-Flat26

4

Pin-Cotter27

2

Pin-Cotter28

2

Screw-HH29

6

Spacer30

6

Retainer-Band, Brake31

2

Pin-Clevis32

1

7

3358-985 Rev A

6

Steering Control Assembly

Ref Part No. Qty. Description

Washer-Belleville2

98-5975
109-2339
109-6058-03
3230-16
1-403180
103-4331
1-543017
3219-2
1-804524
1-633152
103-0384
108-7238
106-9987
1-632208
1-633102
322-6
323-4
323-6
1-803022
3256-3
32128-20
3290-357
108-7237
106-9987

8

4

Damper-Control, Motion3

2

Bracket-Damper Mount4

1

Screw-CARR5

2

Screw-HH8

4

Tracking Rod ASM9

2

Balljoint-RH9:1

1

Nut-Hex9:2

3

Nut9:4

1

Balljoint-LH9:5

1

Spacer10

1

LH Lever ASM11

1

Grip-Control, Motion11:1

1

Arm-Control, Pump12

2

Bearing-Flange, Side16

4

Screw-HH20

3

Screw-HH21

8

Screw-HH22

4

Screw-Set24

2

Washer-Flat30

4

Nut-HF34

6

Nut-HHF, Whiz35

8

RH Lever ASM37

1

Grip-Control, Motion37:1

1

Ref Part No. Qty. Description

10

3296-29
3217-6
109-3906
109-3907
322-12

Nut-Lock, NI38
Nut-Hex39

4

LH Motion Control ASM40

1

RH Motion Control ASM41

1

Screw-HH42

1

A2

3358-985 Rev A

LH Motion Control Assembly No. 109-3906

Ref Part No. Qty. Description

Pin-Clevis1

1-808280
103-0407
109-3902
109-3903
1-303105
1-603737
1-603807
109-3769
3219-2
3230-23
3256-2
109-3908
323-9
3272-5
3296-39

1

Arm-Shaft, Control2

1

Control-Motion, LH3

1

Neutral Return ASM4

1

Yoke-Adjustable4:1

1

Bolt-Return, Neutral4:2

1

Spring-Return, Neutral4:3

1

Bushing-Nylon, Flanged4:4

1

Nut-Hex4:5

3

Screw-CARR4:6

1

Washer-Flat4:7

1

Tab-Adjustment4:8

1

Screw-HH5

3

Pin-Cotter6

1

Nut-Lock, NI7

3

9

3358-985 Rev A

A3

RH Motion Control Assembly No. 109-3707

Ref Part No. Qty. Description

Pin-Clevis1

1-808280
103-0407
109-3901
109-3903
1-303105
1-603737
1-603807
109-3769
3219-2
3230-23
3256-2
109-3908
323-9
3272-5
3296-39

1

Arm-Shaft, Control2

1

Control-Motion, RH3

1

Neutral Return ASM4

1

Yoke-Adjustable4:1

1

Bolt-Return, Neutral4:2

1

Spring-Return, Neutral4:3

1

Bushing-Nylon, Flanged4:4

1

Nut-Hex4:5

3

Screw-CARR4:6

1

Washer-Flat4:7

1

Tab-Adjustment4:8

1

Screw-HH5

3

Pin-Cotter6

1

Nut-Lock, NI7

3

10

7

3358-985 Rev A

Ref Part No. Qty. Description

HYD Hose ASM1

103-3736
103-1947

o

n

n

o

103-1948
103-1949
1-523552
104-7836
103-3733
1-633750
1-633752
103-1799
237-42
1-603991
237-80
1-603992
1-523328
1-809036
3257-42
103-2748
103-6994
103-3330
109-6273

237-42

1

HYD Reservoir ASM2

1

Reservoir-HYD2:1

1

Cap-Reservoir, HYD2:1:1

1

Gasket-Cap2:1:2

1

Decal-Tank, HYD2:2

1

Head-Filter3

1

HYD Hose ASM4

1

Filter-Oil, HYD6

1

Filter-HYD, Winter6

1

Elbow-90 DEG7

2

O-Ring7:1

1

Fitting-Straight10

4

O-Ring10:1

1

O-Ring10:2

1

Motor-Wheel11

2

Nut-HH11:1

1

Key-Woodruff11:2

1

Drive Link Kit11:99

1

Seal Kit11:99

1

Spring-Extension13

1

HYD Hose ASM14

1

Adapter-Run, Tee14:1

1

O-Ring14:1:1

1

Hydraulic Assembly

Ref Part No. Qty. Description

103-1716
103-1988
103-1801
237-42
103-2156
1-603921
103-1020
1-603990
1-603920
1-603992
103-3737
103-3735
109-7689

o

237-42
103-1807
237-42
103-1806
109-6046
109-7738
114-1512
109-4076
1-603050
103-5679

Clamp-Hose16

3

Clamp-Hose17

1

Adapter-Straight18

1

O-Ring18:1

1

Fitting-Straight20

2

O-Ring20:1

1

O-Ring20:2

1

Fitting-Straight21

4

O-Ring21:1

1

O-Ring21:2

1

HYD Hose ASM22

1

HYD Hose ASM23

1

HYD Hose ASM25

1

Fitting-Barb25:3

1

O-Ring25:3:1

1

Elbow-45 DEG26

1

O-Ring26:1

1

HYD Hose ASM27

1

Sheave28

2

Sheave29

1

Belt30

1

Pulley-Flat Idler31

1

Spacer32

1

Pump Idler ASM33

1

11

3358-985 Rev A

7

Hydraulic Assembly (continued)

Ref Part No. Qty. Description

Screw-HH34

321-6
323-8
323-11
1-800805
323-7
1-803050
30-1710
103-2916
3256-22
3256-4
13-2840
5-1077
3290-357
32128-33
1-805004
321-3
109-6130

2

Screw-HH35

1

Screw-HH36

1

Screw-HH37

1

Screw-HH38

4

Screw-Set39

2

Screw40

4

Guard-Top41

2

Washer-Flat42

2

Washer-Flat43

1

Key-Square45

1

Key-Square46

2

Nut-HHF, Whiz47

8

Nut-HF48

2

Washer-Lock49

2

Screw-HH50

2

Pump-HYD, 12Cc W/Fan51

2

12

A3

3358-985 Rev A

Pump Idler Assembly No. 103-5679

Ref Part No. Qty. Description

Bearing-Spherical1

103-3504
103-3506

o

302-40
103-5677
106-7159
32120-10

2

Seal-Single Lip2

2

Pump Idler3

1

Fitting-Grease3:1

1

Spacer4

1

O-Ring5

2

Ring-Snap6

2

13

3358-985 Rev A

8

Seat and Roll-Over Protection System Assembly

Ref Part No. Qty. Description

Seat ASM2

110-0446
110-5850
103-4434
1-633293
322-5
323-39
3296-29
3296-39
32128-20
99-4693
108-1097

1

Seat Frame And Latch ASM14

1

Grip-Lever14:2

1

Rod-Holdup, Seat16

1

Screw-HH17

1

Screw-HH18

2

Nut-Lock, NI20

3

Nut-Lock, NI21

3

Nut-HF23

4

Decal34

1

ROPS ASM78

1

14