Toro 74239 Parts Catalogue

Form Number 3351-975 Rev B

Z500 Z Master

With 52in TURBO FORCE

Model No. 74239 - 250000001 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 - 2005

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

. . . . . . 4Caster and Wheel Assemb ly

. . . . . . 5Main Frame Assembly

. . . . . . 6Brake and Wh ee l Hu b A s s em b l y

. . . . . . 7Steering Control Assembly

. . . . . . 8Hydraulic System Assembly

Seat and Roll-Over-Protection-System
Assembly

Roll-Over-Protection-System Assembly No.
108-1097

. . . . . . 10

. . . . . . 11Seat Assembly No. 107-1867

. . . . . . 12

. . . . . . 13Deck Connection Assembly

. . . . . . 14Drive Idler Assembly

. . . . . . 15Engine and Clutch As s embly

. . . . . . 16Muffler and Guard Assembly

. . . . . . 17Fuel Tank Assembly

. . . . . . 18Electrical Assembly

. . . . . . 19Deck Assembly

. . . . . . 21Spindle Assembly No. 106-3217

. . . . . . 22Deck Decal Assembly No. 107-1623

Description Page

Oil Pan and Lubrication Assembly Kohler
CH23S 76584

Head, Valve and Breather Assembly Kohler
CH23S 76584

Ignition and Electrical Assembly Kohler
CH23S 76584

Blower Housing and Baffle Assembly Kohler
CH23S 76584

Starting System Assembly Kohler CH23S
76584

76584
Air Intake and Filtration Assembly Kohler

CH23S 76584

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

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

INC. . . . . . . . . . . . . . incorporated

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-protectio n-syste m

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

. . . . . . 23Rubber Deflector Assembly No. 106-3249

. . . . . . 24Crankshaft Assembly Kohler CH23S 76584

. . . . . . 25Crankcase Assembly Kohler CH23S 76584

. . . . . . 26

. . . . . . 27

. . . . . . 29

. . . . . . 30

. . . . . . 31

. . . . . . 32Fuel System Assembly Kohler CH23S 76584

. . . . . . 33Engine Control Assembly Kohler CH23S

. . . . . . 34

. . . . . . 35Exhaust Assembly Kohler CH23S 76584

. . . . . . 36Attachments and Accessories List

forming

Footnotes

n

Not illustrated

p

Obtain from your local Kohler dealer

o

Not serviced separately

2

3351-975 Rev B

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
103-2083-03
1-633295
103-2064-03
1-633325
3256-24
3296-39
32151-103
1-633068
323-29
1-633889-01
1-632899-01
1-633082
1-633080
323-13
106-9951

1

Decal-Brake, Parking1:2

1

Plug1:3

2

Fitting-Grease1:4

5

Bushing1:7

1

Front Floorpan ASM3

1

Decal3:2

1

Decal-Warning3:3

1

Bushing4

1

Lift Lever ASM5

1

Grip-Lever, Lift6

1

Arm-Lift, Deck7

1

Spring-Compression8

1

Washer-Flat9

1

Nut-Lock, NI10

9

Ring-Snap11

5

Arm-Lift, Deck12

2

Screw-HH14

2

Plate-Lift, Deck15

1

Plate-Lift, Deck16

1

Bushing-Lever, Lift17

1

Bushing-Lever, Lift18

1

Screw-HH19

1

Hitch Pin ASM20

1

Front Frame Assembly

Ref Part No. Qty. Description

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
107-1861
107-1860
3274-94
106-8983-01
106-8984-01
1-523157
32151-29
3274-18
3218-2
1-513658

12
15

12

2

Screw-HH22
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

Decal-Height, Deck36

1

Decal-Height, Deck37

1

Screw-HSBH38

4

RH Deck Lift ASM40

1

LH Deck Lift ASM41

1

Washer-Spacer42

2

Ring-Retaining43

2

Screw-HSH44

2

Nut-Jam45

2

Bumper46

2

3

3351-975 Rev B

3

Caster and Wheel Assembly

Ref Part No. Qty. Description

Cap-Grease1

103-4882
3296-51
1-633508
254-94
254-72
1-543511
1-642111-01
1-644251
1-633580
1-633581
1-633585
1-633959

o

1-523009
1-633987
1-633584
325-24
3296-45

2

Nut-Lock, NI2

2

Washer-Bellville3

6

Bearing-Cone, Tapered4

4

Bearing-Cup, Tapered5

4

Seal-Grease7

2

Caster8

2

Caster Wheel ASM11

2

Seal-Bearing11:1

2

Spacer-Bearing11:2

2

Bearing-Cone, Taper11:3

2

Spacer-Caster, Front11:4

1

Wheel And Tire ASM11:5

1

Tire11:5:1

1

Wheel11:5:2

1

Bearing-Cup11:5:3

2

Screw-HH21

2

Nut-Lock, NI22

2

4

4

3351-975 Rev B

Ref Part No. Qty. Description

Stop-Brake, Park1

1-633964-03
322-43
323-6
108-1095
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

1

Screw-HH4

6

Screw-HH5

2

Main Frame ASM11

1

Decal-Console, Top11:2

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

1

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

Main Frame Assembly

Ref Part No. Qty. Description

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

4

Nut-Lock, NI52
Washer-Flat53

2

Screw-PRH54

2

Decal-Warning55

1

Decal-Danger56

1

R-Clamp57

2

Housing-Manual58

1

Cap-Housing59

1

5

3351-975 Rev B

5

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

6

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
103-0131
3219-3
3290-357
3253-7
3256-4
3272-10
1-806800
322-9
103-0384
103-0374
1-808285
3272-10

Pin-Spring, Clevis19
Screw-HH20

8

Fitting-Grease21

2

Nut-Square22

8

Nut-Hex23

4

Nut-HHF, Whiz24

4

Washer-Lock25

8

Washer-Flat26

4

Pin-Cotter27

1

Pin-Cotter28

2

Screw-HH29

6

Spacer30

6

Retainer-Band, Brake31

2

Pin-Clevis32

1

Pin-Cotter33

1

6

3351-975 Rev B

Steering Control Assembly

Ref Part No. Qty. Description

Yoke-Adjustable1

1-303105
98-5975
103-4079
1-603735
1-603737
1-603807
1-403180
103-4331
1-543017
3219-2
103-3064
1-804524
1-633152
103-4330
1-543017
3219-2
103-3060
1-804524
1-323245
1-633152
103-3064
108-7237
106-9987
1-632208

2

Washer-Belleville2

4

Damper-Control, Motion3

2

Bushing-Flanged5

2

Bolt-Return, Neutral6

2

Spring-Return, Neutral7

2

Screw-HH8

4

Tracking Rod ASM9

1

Balljoint-RH9:1

1

Nut-Hex9:2

3

Link-Rod, Tracking9:3

1

Nut9:4

1

Balljoint-Thread, LH9:5

1

Tracking Rod ASM10

1

Balljoint-RH10:1

1

Nut-Hex10:2

1

Knob-Tracking10:3

1

Nut10:4

2

Spring-Compression10:5

2

Balljoint-Thread, LH10:6

1

Link-Rod, Tracking10:7

1

RH Lever ASM11

1

Grip-Control, Motion11:2

1

Arm-Control, Pump12

2

Ref Part No. Qty. Description

1

16

Control-Motion, LH13
Control-Motion, RH14

1

Bearing-Flange, Side16

4

Arm-Shaft, Control18

2

Screw-HH20

4

Screw-HH21

8

Screw-HH22

4

Screw-HH23

6

Screw-Set24

2

Nut-Lock, NI25

6

Nut-Hex26

4

Nut-Jam28

2

Washer-Flat29

2

Washer-Flat30

4

Pin-Cotter32

2

Pin-Clevis33

2

Nut-HF34
Nut-HHF, Whiz35

8

LH Lever ASM37

1

Grip-Control, Motion37:2

1

103-4781
103-4782
1-633102
103-0407
322-6
323-4
323-6
323-9
1-803022
3296-39
3219-2
3220-2
3256-2
3256-3
3272-5
1-808280
32128-20
3290-357
108-7238
106-9987

7

3351-975 Rev B

7

Hydraulic System Assembly

Ref Part No. Qty. Description

HYD Hose ASM1

103-3736
103-1947

o

n

n

n

103-1948
103-1949
1-523552
104-7836
103-3733
1-633750
1-633752
103-1799
237-42
1-603991
237-80
1-603992
103-6988
1-809036
3257-42
1-000099
1-000139
103-2748
1-603384
103-3330
103-1828

8

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-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

Seal Kit11:99

1

Bearing Kit11:99

1

Drive Link Kit11:99

1

Bushing-Pivo t , Id l e r12

1

Spring-Extension13

1

Adapter-Run, Tee14

1

Ref Part No. Qty. Description

O-Ring14:1

237-42
103-1716
103-1988
103-1801
237-42
103-1912
237-42
103-1802
1-603921
1-603990
1-603920
1-603992
103-3737
103-3735
103-1826
103-1808
103-1807
237-42
103-1806
103-6907
1-633567
103-7445
1-633167
103-1827

1

Clamp-Hose16

3

Clamp-Hose17

4

Adapter-Straight18

1

O-Ring18:1

1

Adapter-Straight19

1

O-Ring19:1

1

Fitting-HYD, 90 DEG20

2

O-Ring20:1

1

Fitting-Straight21

4

O-Ring21:1

1

O-Ring21:2

1

HYD Hose ASM22

1

HYD Hose ASM23

1

HYD Hose ASM24

1

Hose-HYD25

1

Elbow-45 DEG26

1

O-Ring26:1

1

HYD Hose ASM27

1

Sheave28

2

Sheave29

1

Belt-V30

1

Sheave-Idler31

1

HYD Hose ASM32

1

7

3351-975 Rev B

Hydraulic System Assembly (continued)

Ref Part No. Qty. Description

Bearing Arm ASM33

1-634277
1-513034
302-40
321-6
323-8
323-9
1-800805
323-7
1-803022
30-1710
1-803050
3256-22
3256-3
3256-4
13-2840
1-807272
3290-357
32128-33
1-805004
321-3
103-7262

1

Sleeve-Bearing33:1

2

Fitting-Grease33:3

1

Screw-HH34

2

Screw-HH35

1

Screw-HH36

1

Screw-HH37

1

Screw-HH38

4

Screw-Set39

2

Screw40

2

Screw-Set41

2

Washer-Flat42

2

Washer-Flat43

1

Washer-Flat44

1

Key-Square45

1

Key46

2

Nut-HHF, Whiz47

8

Nut-HF48

2

Washer-Lock49

2

Screw-HH50

2

Pump-HYD51

2

9

3351-975 Rev B

8

Seat and Roll-Over-Protection-System Assembly

Ref Part No. Qty. Description

Seat ASM2

107-1867
1-633293
322-5
323-39
3296-29
3296-39
32128-20
99-4693
108-1097

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

10

A1

3351-975 Rev B

Seat Assembly No. 107-1867

Ref Part No. Qty. Description

Cushion-Seat, Bottom1

11

11

1

Cushion-Seat, Back2

1

Spacer-Track5

4

Track-Seat6

1

Frame-Seat7

1

Screw-HH10
Nut-HF11

4

Washer-Flat17
Armrest Kit18

1

Cushion-Armrest18:1

2

Washer-Flat18:2

4

Screw-HH18:3

2

Channel-Armrest18:4

2

Nut-Hex, Side Deform18:5

2

Bracket-Armrest, RH18:6

1

Bracket-Armrest, LH18:7

1

Screw-HH18:8

6

Nut-Lock, NI18:9

4

Screw-HH18:10

2

Nut-Lock, NI18:11

2

Seatbelt Kit20

1

Screw-HH20:2

2

Nut-Lock, NI20:3

2

103-0290
104-7754
1-543401
1-643255
1-633859
321-30
32128-20
3256-22
105-3620
1-633710
3256-22
322-10
105-3623
32153-3
105-3621
105-3622
321-30
3296-42
325-2
3296-23
103-4469
3212-4
3296-38

11