Form Number 3359-142 Rev A
Z590-D Z Master
With 72in TURBO FORCE
Model No. 74269 - 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
. . . . . . 3 Front Frame Assembly
. . . . . . 5 Caster Wheel and Z Stand Assembly
Engine Frame, Console and Floor Pan
Assembly
Seat and Roll-Over Protection System
Assembly
Roll-Over Protection Systhem Assembly No.
106-7437
. . . . . . 6
. . . . . . 7
. . . . . . 8 Deluxe Seat Assembly No. 110-0838
. . . . . . 9
. . . . . . 10 Wheel and Brake Assembly
. . . . . . 11 Motion Control Assembly
. . . . . . 12 RH Motion Control Assembly No. 109-3978
. . . . . . 13 LH Motion Control Assembly No. 109-3979
. . . . . . 14 Engine Mount Assembly
. . . . . . 15 Wheel Pump Drive Assembly
. . . . . . 16 Deck Belt Drive Assembly
. . . . . . 17 Cooling Pump Drive Assembly
. . . . . . 18 Hydraulic System Assembly
. . . . . . 20 Tank and Fuel Line Assembly
. . . . . . 22 Front and Rear Engine Cover Assembly
. . . . . . 24 Cooling System Assembly
Description Page
. . . . . . 25 Hood Assembly
. . . . . . 26 Deck Connection Assembly
. . . . . . 27 Deck Assembly
. . . . . . 29 Pully and Bearing Assembly No. 114-0210
. . . . . . 30 Deck Decal Assembly No. 107-7677
. . . . . . 31 Spindle Assembly No. 110-3933
. . . . . . 32 Rubber Deflector Assembly No. 108-2792
. . . . . . 33 Electrical Assembly
. . . . . . 35 Cylinder Assembly
. . . . . . 36 Crankshaft Assembly
. . . . . . 37 Cylinder Head Assembly
. . . . . . 38 Injection Pump Assembly
. . . . . . 39 Camshaft Assembly
. . . . . . 40 Oil Pan Assembly
. . . . . . 41 Gear Cover Assembly
. . . . . . 42 Gear Housing Assembly
. . . . . . 43 Water Pump Assembly
. . . . . . 44 Manifold Assembly
. . . . . . 45 Starter Motor and Alternator Assembly
. . . . . . 46 Gasket Assembly
. . . . . . 47 Attachments 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
o
Not serviced separately
2
3359-142 Rev A
Ref Part No. Qty. Description
Frame ASM 1
110-8724
107-1857
1-811010
302-19
94-1291
104-7759
103-1918
3256-29
32151-103
32151-29
1-523157
3296-39
108-7786-01
323-9
323-6
106-9981
106-7451
107-2112
3274-94
1-513658
110-5860
1-633295
103-2083
103-2064
1
Decal-Brake, Parking 1:2
1
Plug 1:3
2
Fitting-Grease 1:4
5
Bushing 1:5
2
Decal-Warning 1:6
1
Bushing 1:7
1
Washer-Flat 2
4
Ring-Retaining, EXT 3
5
Ring-Retaining 4
2
Washer-Spacer 5
2
Nut-Lock, NI 6
8
RH Front Deck Lift ASM 7
1
Screw-HH 8
2
Screw-HH 10
1
Footrest 12
1
Decal 12:2
1
Decal-Warning 12:3
1
Screw-HSBH 13
4
Bumper 14
2
Deck Lift Handle ASM 15
1
Grip-Lever, Lift 15:1
1
Lever-Lift 15:2
1
Arm-Lift, Deck 15:3
1
Front Frame Assembly
Ref Part No. Qty. Description
1-633325
3296-39
3256-24
323-29
103-1918
323-13
110-0833
107-1860
1-633068
1-633082
110-0834
107-1861
3290-357
106-9951
98-5975
323-7
o
1-633096
1-633441
3217-11
3218-6
3256-7
1-643015
3218-2
15
12
12
1
Spring-Compression 15:4
Nut-Lock, NI 15:5
1
Washer-Flat 15:6
1
Screw-HH 16
2
Bushing 18
2
Screw-HH 21
1
Plate-Deck Lift, Outer 22
1
Decal-Height, Deck 22:2
1
Arm-Lift, Deck 23
2
Bushing-Lever, Lift 24
1
Plate-Deck Lift, Inner 25
1
Decal-Height, Deck 25:2
1
Nut-HHF, Whiz 26
Hitch Pin ASM 27
1
Washer-Belleville 28
Screw-HH 29
Front Frame Spring ASM 30
2
Rod-Lift, Deck 30:1
1
Swivel-Deck Mount, Rear 30:2
2
Nut-Hex 30:3
3
Nut-Jam 30:4
3
Washer-Flat 30:5
2
Spring-Support, Deck 30:6
1
Nut-Jam 31
2
3
3359-142 Rev A
2
Front Frame Assembly (continued)
Ref Part No. Qty. Description
Screw-HSH 32
3274-18
106-8984-01
1-633080
2
LH Deck Lift ASM 33
1
Bushing-Lever, Lift 34
1
4
3
3359-142 Rev A
Caster Wheel and Z Stand Assembly
Ref Part No. Qty. Description
Castor Wheel ASM 1
2
Seal-Bearing 1:1
2
Spacer-Bearing 1:2
2
Bearing-Cone, Taper 1:3
2
Spacer-Caster, Front 1:4
1
Wheel And Tire ASM (Semi-
1
Pneumatic)
Bearing-Cup 1:5:3
1
Screw-HH 1:21
1
Nut-Lock, NI 1:22
1
Leg ASM 3
1
Decal-Z Stand 3:2
1
Pin-Hair 4
1
Pivot Pin ASM 5
1
Washer-Thrust 6
2
Pin-Clevis 7
1
Screw-HH 8
1
Bracket-Latch 9
1
Nut-Lock, NI 10
2
Pin-Lynch 11
1
Bearing-Cup, Tapered 12
4
Bearing-Cone, Tapered 13
4
Washer-Bellville 14
6
Nut-Lock, NI 15
2
1:5
110-5746
1-633580
1-633581
1-633585
1-633959
110-5744
1-633584
325-24
3296-45
107-1874
106-7464
3290-355
100-9692-01
3-6781
283-55
323-8
100-9686-01
3296-39
283-71
254-72
254-94
1-633508
3296-51
Ref Part No. Qty. Description
Cap-Grease 16
103-4882
105-1647
100-9385
3296-42
100-6547
108-4136-01
323-20
321-4
1-543511
103-1474-01
110-8837
1-633581
1-633580
1-633584
1-633585
103-2768
2
1
Pin-Hitch, Cotterless 17
Lanyard-Nylon 18
1
Nut-Lock, NI 19
1
Cushion-Rubber 20
2
Bracket-Cradle 21
1
Screw-HH 22
1
Screw-HH 23
1
Seal-Grease 24
2
Fork-Caster 25
2
Caster Wheel Bearing Kit 27
1
Spacer-Bearing 27:1
2
Seal-Bearing 27:2
2
Bearing-Cup 27:3
2
Bearing-Cone, Taper 27:4
2
Guard-Seal 28
2
5
3359-142 Rev A
4
Engine Frame, Console and Floor Pan Assembly
Ref Part No. Qty. Description
Screw-HH 1
322-43
3256-70
3296-42
115-3551
106-9989
106-7492
107-9866
98-5954
107-1865
104-7050
3296-39
1-633964-03
323-20
323-6
115-3852
98-4387
107-1864
114-5879
3258-166
106-7488-03
3296-59
104-7048
321-4
106-7489-03
6
6
Washer-Flat 2
4
Nut-Lock, NI 3
4
Engine Frame ASM 6
1
Decal-Warning 6:2
1
Decal-Danger 6:3
1
Decal-Console, Top 6:4
1
Decal-Cover, Missing 6:5
2
R-Clamp 7
2
Housing-Manual 8
1
Nut-Lock, NI 9
2
Stop-Brake, Park 10
1
Screw-HH 11
2
Screw-HH 12
2
Floor Pan ASM 13
1
Decal-Protection, Ear 13:2
1
Decal-Location, Manual 13:3
1
Decal-Diesel, Bio-Ready 13:4
1
Screw-PRH 14
2
Hinge-Floorpan, LH 15
1
Nut-Lock, NI 16
2
Cap-Housing 17
1
Screw-HH 18
2
Hinge-Floorpan, RH 19
1
Ref Part No. Qty. Description
1
106-7498
Pocket 20
5
3359-142 Rev A
Seat and Roll-Over Protection System Assembly
Ref Part No. Qty. Description
Screw-HH 1
323-39
3296-29
322-5
109-2759
103-5161
3296-39
1-633872-03
110-0838
32128-20
106-7437
2
Nut-Lock, NI 2
4
Screw-HH 3
5
Link-Stop, Seat 4
2
Link-Stop, Seat 6
2
Nut-Lock, NI 7
2
Stop-Seat 8
2
Deluxe Seat ASM 13
1
Nut-HF 15
4
ROPS ASM 28
1
7
3359-142 Rev A
A1
Deluxe Seat Assembly No. 110-0838
Ref Part No. Qty. Description
Seat-Suspension 1
112-8355
107-1880
107-1885
107-1881
107-1883
82-2190
107-1887
107-1884
112-8356
110-0883
o
3212-4
3296-7
109-6226
1
Seat Track Kit 1:1
1
Weight Indicator Kit 1:2
1
Knob Kit 1:3
1
Bottom Cushion Kit 1:4
1
Switch-Bail 1:5
1
Armrest Kit 1:6
1
Shock Absorber Kit 1:7
1
Cushion-Back 1:8
1
Retractable Seatbelt Kit 4
1
Seatbelt-Retractable 4:1
1
Screw-HH 4:2
2
Nut-Lock 4:3
2
Seat Belt Extension Kit 4:99
1
8
A2
3359-142 Rev A
Roll-Over Protection Systhem Assembly No. 106-7437
Ref Part No. Qty. Description
o
o
o
6
o
107-2102
107-3069
3296-73
109-2365
107-2101
103-4553
110-0883
3212-4
3296-7
109-6226
109-1813
103-5520
103-5519
107-0075
109-1810-03
3256-4
3296-39
323-9
325-13
Upper Tube ASM 1
1
Decal-Warning, Folding ROPS 2
1
Tube-Support, RH 4
1
Tube-Support, LH 5
1
Decal-Warning, Folding ROPS
1
(Ce)
Nut-Lock, NI 7
2
Bumper-Rubber (W/Stud) 9
2
Decal-ROPS 10
1
ROPS Fold Pin ASM 11
2
Retractable Seatbelt Kit 12
1
Screw-HH 12:2
2
Nut-Lock 12:3
2
Seat Belt Extension Kit 12:99
1
Seat Frame Single Latch ASM 13
1
Catch-Latch, Single 13:1
1
Spring-Torsion, Latch 13:2
1
Bushing-Latch, Seat 13:3
1
Frame-Seat, Single Latch 13:4
1
Washer-Flat 13:5
1
Nut-Lock, NI 13:6
1
Screw-HH 13:7
1
Bag-Bolt 14
1
Screw-HH 14:10
2
Ref Part No. Qty. Description
2
32128-23
323-8
98-5975
3290-357
Nut-HF 14:11
Screw-HH 14:20
8
Washer-Belleville 14:21
8
Nut-HHF, Whiz 14:22
8
9
3359-142 Rev A
6
Wheel and Brake Assembly
Ref Part No. Qty. Description
Screw-HH 1
323-4
1-633102
3290-357
109-5618
87-7270
103-0197
1-633268
103-1708
3219-3
1-633131
1-808285
109-5011
103-2399
109-5012
323-10
3257-42
325-20
109-3157
109-3156
103-4963
242-50
1-806800
1-809036
1-523157
10
2
Bearing-Flange, Side 2
2
Nut-HHF, Whiz 3
4
Nut,Square Special 4
8
Washer-Thrust 5
4
Brake Lever And Grip ASM 6
1
Grip-Lever, Brake 6:2
1
Rod-Brake 7
1
Nut-Hex 8
2
Yoke-Linkage, Brake 9
2
Pin-Clevis 10
1
Spacer-Wheel, Short 11
4
Pin-Spring, Clevis 12
1
Spacer-Wheel, Long 13
4
Screw-HH 14
2
Key-Woodruff 15
2
Screw-HH 16
8
Wheel And Tire ASM 17
2
Wheel 17:1
1
Tire 17:2
1
Nut-Lug 18
8
Pin-Cotter 19
2
Nut-HH 20
2
Washer-Spacer 21
2
Ref Part No. Qty. Description
2
103-0590
103-0589
1-633926
322-9
103-0374
103-0355
103-0384
302-19
3296-39
3256-4
1-633144
3218-3
103-0810-03
103-0051
1-808284
103-1117-03
1-633454
323-58
103-5243-03
32151-48
1-513140
3272-10
Hub And Wheel ASM 22
Wheel Hub ASM 22:1
1
Stud-Wheel 22:2
4
Screw-HH 23
6
Retainer-Band, Brake 24
2
Band-Brake 25
2
Spacer 26
6
Fitting-Grease 27
2
Nut-Lock, NI 28
4
Washer-Flat 29
6
Pin-Trunion 30
2
Nut-Jam 31
2
Brake-Wide 32
2
Spacer-Retainer, Brake 33
2
Pin-Clevis 34
2
Linkage-Brake, Lower 35
2
Spring-Brake 36
2
Bolt-TAP, HH 37
2
Shaft-Brake 38
1
E-Ring 39
1
Bearing-Control 40
2
Pin-Cotter 41
4
7
3359-142 Rev A
Motion Control Assembly
Ref Part No. Qty. Description
Bearing-Flange, Side 1
1-633102
3296-29
103-1361
322-12
3290-357
322-14
1-403180
103-5192
98-5975
323-6
108-7237
106-9987
108-7238
106-9987
322-6
103-0194-03
103-5190
1-543017
1-633152
1-804524
3219-2
1-323245
32128-20
323-4
4
Nut-Lock, NI 3
8
Spacer-Hydro Control, LH 4
1
Screw-HH 5
1
Nut-HHF, Whiz 6
8
Screw-HH 7
1
Screw-HH 8
4
Spacer-Control, HYD 9
1
Washer-Belleville 19
4
Screw-HH 20
4
RH Lever ASM 21
1
Grip-Control, Motion 21:1
1
LH Lever ASM 22
1
Grip-Control, Motion 22:1
1
Screw-HH 26
4
Arm-Control, Hydro 28
2
RH HYD Connect Link ASM 29
1
Balljoint-RH 29:1
1
Balljoint-LH 29:2
1
Nut 29:3
2
Nut-Hex 29:5
3
Spring-Compression 29:6
1
Nut-HF 30
6
Screw-HH 31
8
Ref Part No. Qty. Description
2
109-2339
1-803022
103-3062
1-543017
103-3060
1-804524
1-323245
1-633152
3219-2
3217-6
109-3978
109-3979
Damper-Control, Motion 32
Screw-Set 33
2
Tracking Rod ASM 34
1
Balljoint-RH 34:1
1
Knob-Tracking 34:2
1
Nut 34:3
2
Spring-Compression 34:4
2
Balljoint-LH 34:5
1
Nut-Hex 34:7
1
Nut-Hex 35
4
RH Motion Control ASM 36
1
LH Motion Control ASM 37
1
11
3359-142 Rev A
A3
RH Motion Control Assembly No. 109-3978
Ref Part No. Qty. Description
Pin-Clevis 1
1-808280
103-0407
109-3903
1-303105
1-603737
1-603807
109-3769
3219-2
3230-23
3256-2
109-3908
109-3980
323-9
3272-5
3296-39
1
Arm-Shaft, Control 2
1
Neutral Return ASM 3
1
Yoke-Adjustable 3:1
1
Bolt-Return, Neutral 3:2
1
Spring-Return, Neutral 3:3
1
Bushing-Nylon, Flanged 3:4
1
Nut-Hex 3:5
3
Screw-CARR 3:6
1
Washer-Flat 3:7
1
Tab-Adjustment 3:8
1
Control-Motion, RH 4
1
Screw-HH 5
3
Pin-Cotter 6
1
Nut-Lock, NI 7
3
12
A4
3359-142 Rev A
LH Motion Control Assembly No. 109-3979
Ref Part No. Qty. Description
Pin-Clevis 1
1-808280
103-0407
109-3903
1-303105
1-603737
1-603807
109-3769
3219-2
3230-23
3256-2
109-3908
109-3983
323-9
3272-5
3296-39
1
Arm-Shaft, Control 2
1
Neutral Return ASM 3
1
Yoke-Adjustable 3:1
1
Bolt-Return, Neutral 3:2
1
Spring-Return, Neutral 3:3
1
Bushing-Nylon, Flanged 3:4
1
Nut-Hex 3:5
3
Screw-CARR 3:6
1
Washer-Flat 3:7
1
Tab-Adjustment 3:8
1
Control-Motion, LH 4
1
Screw-HH 5
3
Pin-Cotter 6
1
Nut-Lock, NI 7
3
13
3359-142 Rev A
8
Ref Part No. Qty. Description
Screw-HH 1
15
1
Washer 2
2
Nut-HHF, Whiz 3
2
Isolator-Rear 4
1
Screw-HH 5
2
Bracket-Ground 6
1
Rear Engine Mount ASM 7
1
Nut-Lock, NI 8
1
Screw-HH 9
2
Washer-Flat 10
2
Washer 11
2
Isolator-Side 12
2
Screw-HH 13
4
Screw-HH 14
LH And RH Engine Mount ASM 15
2
Washer-Flat 16
2
Nut-Lock, NI 17
3
Hose 18
1
Clamp-Hose 19
2
Engine-Daihatsu 20
1
Muffler Kit 21
1
Washer-Belleville 22
3
Washer-Flat 23
4
Screw-HH 24
3
325-10
86-1990
3290-357
103-1022
323-5
103-3908
103-0870-03
3296-23
323-12
83-1040
66-6480
103-2613
322-3
33114-020
103-0839-03
3256-4
3296-39
103-0921
2412-42
103-0888
103-2592
98-5975
3256-23
322-14
14
Engine Mount Assembly
Ref Part No. Qty. Description
103-3573-03
3256-24
56-2150
323-8
103-3745
322-12
103-1385
32128-20
103-3556-03
1-303334
33114-045
93-6099
103-3568
3296-6
1
Cover-Flywheel 25
Washer-Flat 26
4
Screw-HH 27
2
Screw-HH 28
2
Ball Joint Link ASM 29
2
Screw-HH 30
1
Gasket-Muffler 31
1
Nut-HF 32
7
Bracket-Engine, Front 33
1
Washer-Spring 34
3
Screw-HH 35
3
Washer 36
4
Isolator-Link 37
2
Nut-Lock 38
2
9
3359-142 Rev A
Wheel Pump Drive Assembly
Ref Part No. Qty. Description
Key 1
103-2739
103-2978
n
n
100-6110
32128-49
103-4467
1-513034
323-4
3296-39
3256-4
103-0919
103-2979
100-6110
323-12
1-603413
325-5
1-803050
103-1471
107-7724
1-805005
322-2
33114-020
3256-23
3256-24
3290-357
2
Pump-Hydro, LH 2
1
Overhaul Seal Kit 2:1
1
Nut-HHF 3
4
Pump Idler ASM 4
1
Sleeve-Bearing 4:20
2
Screw-HH 5
3
Nut-Lock, NI 6
1
Washer-Flat 7
1
Bushing-Tightener, Pivot 8
1
Pump-Hydro, RH 9
1
Overhaul Seal Kit 9:1
1
Screw-HH 10
1
Spring-Extension 11
1
Screw-HH 12
4
Screw-Set 13
4
Hub-Pump 14
2
Belt-V 15
1
Washer-Lock 16
6
Screw-HH 17
6
Screw-HH 18
4
Washer-Flat 19
4
Washer-Flat 20
1
Nut-HHF, Whiz 21
4
Ref Part No. Qty. Description
22
103-1459
103-1421
103-1472
103-4464
103-5164
98-5975
323-6
323-16
103-4463-03
302-11
1
Pin-Roll
Hub-Drive, Pump 23
1
Sheave-Pump 24
2
Idler-Pump 25
1
Sheave-Engine 26
1
Washer-Belleville 27
2
Screw-HH 28
1
Screw-HH 29
1
Arm-Tightener, Pump 30
1
Fitting-Lube, 45 DEG 31
1
15