Toro 74177 Parts Catalogue
Form No. 3324–970
Z150
Z–Master with 44in. Side Discharge Mower
Model No. 74177—210000001 and Up
Parts Catalog
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 entire service assembly and the b represents a
sequential number unique to each part within the service
assembly.
The a represents the reference number of
The TORO Company — 2001
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.
3324–972
Contents
Description Page Description Page
Front Frame Assembly 4. . . . . . . . . . . . . . . . . . . . .
Height of Cut Handle and Plates 6. . . . . . . . . . . . .
Main Frame 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel System Assembly 8. . . . . . . . . . . . . . . . . . . . .
Parking Brake System Assembly 9. . . . . . . . . . . .
Motion Control System Assembly 10. . . . . . . . . . . .
Hydraulic System Assembly 11. . . . . . . . . . . . . . . .
Pump, Idler and Belt Assembly 12. . . . . . . . . . . . . .
Engine and Clutch Assembly 13. . . . . . . . . . . . . . . .
Electrical System Assembly 14. . . . . . . . . . . . . . . . .
Deck Assembly 15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Deck Spindle Assembly 16. . . . . . . . . . . . . . . . . . . .
Idler, Pulley/Lift Strut Chains Assembly 17. . . . . . .
Electrical Schematic 18. . . . . . . . . . . . . . . . . . . . . . .
Air Intake Assembly 19. . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Assembly 20. . . . . . . . . . . . . . . . . . . . . .
Head/Valve/Breather Assembly 22. . . . . . . . . . . . . .
Ignition/Electrical Assembly 24. . . . . . . . . . . . . . . . .
Blower Housing & Baffles Assembly 26. . . . . . . . .
Starting System Assembly 28. . . . . . . . . . . . . . . . . .
Oil Pan/Lubrication Assembly 30. . . . . . . . . . . . . . .
Fuel System Assembly 31. . . . . . . . . . . . . . . . . . . . .
Engine Controls Assembly 33. . . . . . . . . . . . . . . . . .
Exhaust Assembly 34. . . . . . . . . . . . . . . . . . . . . . . . .
Accessories
Description Model / Part No. Description Model / Part No.
Recycler Kit 59220. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ROPS Kit 79470. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mulching Kit 59226. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade–Atomic 15.5 104–1300. . . . . . . . . . . . . . . . . . . .
Striping Kit 30121. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Suspension Seat 74210. . . . . . . . . . . . . . . . . . . . .
Hitch Kit 99–8924. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z–Stand Kit 105–1621. . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Part Description Abbreviations
Part descriptions in this catalog may include the following abbreviations.
Abbreviation Meaning Abbreviation Meaning
AR as required. . . . . . . . . . . . . . . . .
ASM assembly. . . . . . . . . . . . . . . .
CARR carriage. . . . . . . . . . . . . .
DEG degrees. . . . . . . . . . . . . . . .
FH flat head. . . . . . . . . . . . . . . . .
GA gauge. . . . . . . . . . . . . . . . .
HF hex flange. . . . . . . . . . . . . . . . .
HH hex head. . . . . . . . . . . . . . . . .
HHF hex head flange. . . . . . . . . . . . . . . .
HLH hex lag head. . . . . . . . . . . . . . . .
HJ hex jam. . . . . . . . . . . . . . . . . .
HOC height-of-cut. . . . . . . . . . . . . . . .
HS hex socket. . . . . . . . . . . . . . . . .
HSBH hex socket button head. . . . . . . . . . . . . .
HSFH hex socket flat head. . . . . . . . . . . . . . .
HSH hex socket head. . . . . . . . . . . . . . . .
HWH hex washer head. . . . . . . . . . . . . . .
HWHTF hex washer head. . . . . . . . . . . . .
thread forming
INC incorporated. . . . . . . . . . . . . . . . .
LH left hand. . . . . . . . . . . . . . . . .
NI nylon insert. . . . . . . . . . . . . . . . . .
PPH Phillips pan head. . . . . . . . . . . . . . . .
PTH Phillips truss head. . . . . . . . . . . . . . . .
PTO power take off. . . . . . . . . . . . . . . .
RH right hand. . . . . . . . . . . . . . . . .
SFH slotted fillister head. . . . . . . . . . . . . . . .
SHH slotted hex head. . . . . . . . . . . . . . . .
SQH square head. . . . . . . . . . . . . . . .
SHWH slotted hex washer head. . . . . . . . . . . . . .
SPH slotted pan head. . . . . . . . . . . . . . . .
SRH slotted round head. . . . . . . . . . . . . . . .
STD standard. . . . . . . . . . . . . . . .
TAP self tapping. . . . . . . . . . . . . . . .
TTH Torx truss head. . . . . . . . . . . . . . . .
WH wing head. . . . . . . . . . . . . . . . .
3324–972
3
3324–970
9
11:3
8
7
6
5
38
5
4
10
11
11:2
12
14
15
16
17
18
22
13
20:2
13:4
14
13:3
13:2
15
21
9
19
20
23
24
27
25
26
22
3
1:2
1:3
1:4
1
1:5
1:1
1:7
1:1:1
1:1:2
1:1:3
1:4
36
18
1:2
1:3
Front Frame Assembly
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
1 1–634662 2 Caster Wheel ASM
1:1 1–633582 1 Wheel & Tire ASM
1:1:1 1–633002 1 Tire
1:1:2 1–633583 1 Wheel
1:1:3 1–633584 2 Bearing–Cup
1:2 1–633581 2 Spacer–Bearing
1:3 1–633580 2 Seal–Bearing
1:4 1–633585 2 Bearing–Cone, Taper
1:5 1–633579 1 Spacer–Caster, Front
1:6 325–36 1 Screw–HH
1:7 3296–45 1 Nut–Lock, NI
3 1–632511–01 2 Caster
4 1–543511 2 Seal–Grease
5 254–94 4 Bearing–Taper, Cone
6 1–633508 6 Washer–Bellville
7 3296–51 2 Nut–Lock, NI
8 1–543513 2 Cap–Grease
9 322–3 6 Screw–HH
10 3256–23 4 Washer–Flat
11 99–3940 1 Floorpan–Front
11:2 1–633553 1 Pad–Antiskid
11:3 1–633737 1 Decal–Z–Master
12 1–653049 1 Hinge–Floorpan
13 99–3930 1 Footrest ASM
13:2 99–3924 1 Decal–Service
13:3 98–5954 1 Decal–Missing, Cover
21
1:6
36
35
18
26
27
26
26
28
13:4 1–633553 1 Pad–Antiskid
14 3229–10 10 Screw–CARR
15 32128–33 10 Nut–HF
16 3230–1 2 Screw–CARR
17 99–3870–01 2 Bracket–Floorpan
18 32128–20 8 Nut–HF
19 105–2625 1 Decal–Safety STD
20 99–3931 1 Front Frame ASM
20:2 1–633818 1 Decal–Warning
21 32151–103 6 Ring–Snap
22 3256–29 6 Washer–Flat
23 3290–357 12 Nut–Flange, Lock
24 98–5975 12 Washer–Belleville
25 323–7 12 Screw–HH
26 3217–11 8 Nut–Hex
27 1–633441 4 Swivel–Deck Mount,
Rear
28 3218–6 4 Nut–Jam
29 3256–7 2 Washer–Flat
30 1–653011 2 Rod–Lift, Deck*
31 1–653009 2 Spring–Compression
32 3256–27 2 Washer–Flat
33 99–3871–01 1 LH Lift Arm ASM
34 99–3872–01 1 RH Lift Arm ASM
35 302–19 4 Fitting–Grease
36 1–811010 2 Plug
33 LH
34 RH
32
28
29
30
31
Sheet No.:2
4
9
11:3
8
7
6
5
38
5
4
10
11
11:2
12
14
15
16
17
18
22
13
20:2
13:4
14
13:3
13:2
15
21
3324–970
9
19
20
23
24
27
25
26
22
3
1:2
1:3
1:4
1
1:5
1:1
1:7
1:1:1
1:1:2
1:1:3
1:4
36
18
1:2
1:3
Front Frame Assembly
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
38 254–72 4 Bearing–Taper, Cup
21
1:6
36
35
18
26
27
26
28
26
33 LH
34 RH
32
28
29
30
31
Sheet No.:2
5
3324–970
12
10
22
9
8
1
7
3
11
3
4
13
17
18
19
4
20
6
5
4
1
15
2
3
23
Height of Cut Handle and Plates
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
1 323–9 2 Screw–HH
2 32151–103 1 Ring–Snap
3 3290–357 3 Nut–Flange, Lock
4 3296–39 3 Nut–Lock, NI
5 1–652235–01 1 Plate–Lift, Deck
6 1–633080 1 Bushing–Lever, Lift
7 1–653230–01 1 Plate–Lift, Deck
8 1–806005 1 Pin–Cotter, Hair
9 323–6 1 Screw–HH
10 323–13 1 Screw–HH
11 1–633082 1 Bushing–Lever, Lift
12 1–652023–03 1 Lever–Lift
13 1–633295 1 Grip–Lever, Lift
14 1–633097 1 Pin–Hitch W/Lanyard
15 302–19 1 Fitting–Grease
16 1–806003 2 Pin–Cotter, Hair
17 99–3922–03 1 Arm–Lift
18 1–633325 1 Spring–Compression
19 3256–24 1 Washer–Flat
20 1–633068 2 Arm–Lift, Deck
21 1–808284 2 Pin–Clevis
22 1–653140 1 Decal,Deck Height
Outer
23 1–653147 1 Decal–Deck Height,
Inner
16
21
14
3
Sheet No.:3
6
3324–970
32
2:2
18
18:2
18:1
18:6
18:5
17
16
15
14
13
9
6
8
7
33
10
24
25
26
5
13:2
18:7
19
20
22
23
18:3 RH
18:4 LH
27
28
28:1
28:2
29
5
4
31
3
2:3
2
2:4
1
12
11
10
Main Frame
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
1 1–513658 2 Bumper–Catcher,
Grass
2 99–3932 1 Control Panel ASM
2:2 99–3942 1 Decal–Panel, Control
2:3 103–0262 1 Decal–Valve, Fuel
2:4 98–4387 1 Decal–Protection, Ear
3 1–603336 1 Control–Choke
4 1–807513 2 Bolt–CARR
5 322–5 3 Screw–HH
6 3256–23 2 Washer–Flat
7 1–513592 1 Knob–Ball, Red
8 322–3 3 Screw–HH
9 1–653089–03 1 Bracket
10 32128–20 12 Nut–HF
11 1–633696 1 Cable–Throttle
12 3296–2 2 Nut–Lock
13 99–3933 1 Console ASM
13:2 103–0315 1 Decal–Console
14 1–632187–03 1 Frame–Seat
15 323–39 2 Screw–HH
16 3296–29 1 Nut–Lock NI
17 1–653495 1 Rod–Hold Up, Seat
18 1–633705 1 Seat W/Tracks
18:1 103–0290 1 Cushion–Bottom, Seat
18:2 104–7754 1 Cushion–Back, Seat
18:3 1–633710 1 Cushion–Armrest, RH
30
5
Sheet No.:4
18:4 1–633711 1 Cushion–Armrest, LH
18:5 1–543401 4 Spacer–Track
18:6 1–643255 1 Grip–Track, Seat
18:7 1–633859 1 Frame–Seat
19 99–4693 1 Decal–Toro
20 2412–120 2 R–Clamp
22 32104–76 2 Screw
23 74–0720 1 Tube–Manual
24 1–523420 2 Bumper
25 103–0712–03 1 Mainframe
26 3296–42 2 Nut–Lock, NI
27 65–2690 2 Decal–Surface, Hot
28 1–653010 2 Wheel & Tire ASM
28:1 1–653160 1 Tire
28:2 1–653158 1 Wheel
29 242–50 8 Nut–Lug
30 322–2 6 Screw–HH
31 99–4604 1 Decal–Z150
32 3256–3 2 Washer–Flat
33 3296–39 2 Nut–Lock, NI
7
3324–970
12
16
7
20
20:3
21
3
22
23
10
11
7
10
9
7
Fuel System Assembly
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
1 104–5120 1 Tank–Fuel, LH
2 104–5121 1 Tank–Fuel, RH
3 3256–23 8 Washer–Flat
4 1–805005 4 Washer–Lock
5 322–3 4 Screw–HH
6 1–543277 2 Elbow–Tank, Fuel
7 1–303077 6 Clamp–Line, Fuel
8 1–513645 2 Bushing–Valve, Fuel
9 1–543296 2 Grommet–Line, Fuel
10 1–543526 2 Hose–Fuel
11 1–633347 1 Valve–Fuel
12 103–0216 1 Hose–Fuel
16 1–303335 1 Tie–Plastic
20 88–3980 2 Gas Cap ASM
20:3 88–4010 1 Gasket–Cap, Gas
21 1–633023 4 Stud
22 1–633349 4 Spring–Tank, Fuel
23 3296–47 4 Nut–Lock, NI
1 LH
2 RH
3
4
5
8
6
Sheet No.:5
8
1
3324–970
4
29
14
Sheet No.:6
21
31
24
17
2
3
4
5
6
34
7
34:2
9
11
11:1
15
10
14
16
11:2
34:1
13
33
2
3
5
30
3
21
28
26
22
21
32
28
5
2
15
27
23
4
27
25
18
19
20
19
5
Parking Brake System Assembly
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
1 1–652073–03 1 Crank–Brake, Park
2 3272–10 4 Pin–Cotter
3 1–633131 4 Yoke–Linkage, Brake
4 1–808285 4 Pin–Clevis
5 3219–3 8 Nut–HH
6 103–0356 2 Rod–Brake
7 1–653068 4 Spacer–Wheel
9 325–13 8 Screw–HH
10 103–0355 2 Band–Brake
11 103–0590 2 Hub–Wheel W/Studs
11:1 103–0589 1 Hub–Wheel
11:2 1–633926 4 Stud–Wheel
13 1–806800 2 Pin–Cotter
14 103–0374 2 Retainer–Band, Brake
15 103–0384 6 Spacer
16 322–9 6 Screw–HH
17 103–0352–03 2 Bracket–Brake
18 1–633144 2 Pin–Trunion
19 3256–4 4 Washer–Flat
20 1–633454 2 Spring–Brake
21 323–4 9 Screw–HH
22 1–653074–03 1 Handle–Brake, Park
23 1–633268 1 Grip–Lever, Brake
24 1–653069 4 Spacer–Wheel
25 3253–7 8 Washer–Lock
26 103–0131 8 Nut–Square
27 1–633102 4 Bearing–Flange, Side
28 3290–357 8 Nut–Flange, Lock
29 1–652085 1 Shaft–Brake, Parking
30 1–653061 1 Linkage–Handle,
Brake
31 1481 2 Fitting–Grease
32 98–5975 1 Washer–Belleville
33 1–523157 2 Washer–Spacer
34 1–523328 2 Motor–Wheel
34:1 1–809036 1 Nut–HH
34:2 3257–42 1 Key–Woodruff
*34:99 1–000099 1 Kit–Seal
*34:99 1–000139 1 Kit–Bearing
* Not illustrated
9
3324–970
27
26
25
24
23
28 RH
15 LH
16
7
14
13
12
17
11
18
9
29
30
19
21
20
9
9
7
22
11
13
40 39
9
1
3
2
4
58
31
32
33
9
36
16
37
16
38
Sheet No.:7
Motion Control System Assembly
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
1 1–403180 2 Screw–HH
2 1–653316 2 Pin–Dampner
3 3256–23 4 Washer–Flat
4 32120–35 2 E–Ring
5 1–523027 2 Damper–Control
7 1–633102 4 Bearing–Flange, Side
8 1–652467 1 Control–Motion, LH
9 32128–20 12 Nut–HF
11 3256–3 4 Washer–Flat
12 1–543017 2 Balljoint–RH
13 322–6 4 Screw–HH
14 3290–357 8 Nut–Flange, Lock
15 1–632191–03 1 Lever–Control, LH
16 3219–2 10 Nut–Hex
17 1–653046 2 Linkage–Pump/Lever
18 1–633152 2 Balljoint–Thread, LH
19 323–4 8 Screw–HH
20 1–653092 2 Arm–Control, Pump
21 1–803022 2 Screw
22 1–804524 2 Nut
23 1–652466 1 Control–Motion, RH
24 3296–39 6 Nut–Lock, NI
25 1–633177 2 Arm–Control, Shaft
26 98–5975 4 Washer–Belleville
27 323–6 4 Screw–HH
28 1–632193–03 1 Lever–Control, RH
29 1–633257 2 Grip–Control, Motion
30 323–9 6 Screw–HH
31 1–603737 2 Bolt–Return, Neutral
32 1–603807 2 Spring–Return,
Neutral
33 1–603735 2 Bushing–Flanged
36 3256–2 2 Washer–Flat
37 3220–2 2 Nut
38 1–303105 2 Yoke–Adjustable
39 1–808280 2 Pin–Clevis
40 3272–5 2 Pin–Cotter
10
18:2
26
25
44
22
23
24
18
18:1
19
20
17:2
17
16
15
16:1
3
21
35
24:2
27
28
29
30
31
32
33
34
36
37
3324–970
14
13
12
11
10
9
8
3:1
17:1
6
5
4
3
2
7
1
Hydraulic System Assembly
DescriptionPart No. Qty.Ref. No. DescriptionPart No. Qty.Ref. No.
1 1–603841 2 Pump–Hydraulic *
*1 80–6130 2 Kit–Seal, Overhaul
2 1–632285 1 Hose ASM
3 1–513840 2 Fitting–90
3:1 237–42 1 O–Ring
4 1–603721 1 Fitting–Tee, Hose
5 1–603827 5 Clamp–Hose
6 1–413273 2 Hose
7 1–653156 2 Sheave
8 1–803050 4 Screw–Set
9 1–807272 2 Key–Machine
10 323–7 4 Screw–HH
11 3290–357 4 Nut–Flange, Lock
12 1–613073 2 Grip–Valve, Dump
13 3296–42 2 Nut–Lock, NI
14 1–801063 2 Screw
15 1–632286 1 Hose ASM
16 1–603989 2 Fitting
16:1 237–78 1 O–Ring
17 1–603990 4 Fitting–Straight
17:1 237–79 1 O–Ring
17:2 1–603992 1 O–Ring
18 1–633605 2 Fitting–Connector
18:1 1–603992 1 O–Ring
18:2 237–80 1 O–Ring
19 1–653186 1 Hose,Front
5
17:2
16:1
17:1
16
5
6
17
38
40:1
39
40:2
Sheet No.:8
40
20 1–653187 1 Hose,RH Rear
21 1–654144 1 Hose *
22 1–603987 1 Fitting–Elbow
23 1–603988 1 Fitting–Elbow
24 99–4625 1 Hydraulic Tank ASM
24:2 1–523552 1 Decal–Tank, Hydraulic
25 1–523103 1 Gasket–Cap, Tank
26 1–513167 1 Cap
27 321–15 2 Screw–HH
28 32128–33 2 Nut–HF
29 1–654320 1 Hose *
30 1–654509 1 Hose *
31 1–513510 1 Fitting–Straight
32 1–603720 1 Head–Filter
33 32128–20 2 Nut–HF
34 1–633750 1 Filter–HYD
34 1–633752 1 Filter–HYD, Winter
35 322–5 2 Screw–HH
36 1–603722 1 Fitting–Tee, Hose
37 1–603826 3 Clamp–Hose
38 1–653409 1 Hose,Hydraulic*
39 1–653410 1 Hose,Hydraulic*
40 1–633786 2 Fitting–90*
40:1 237–80 1 O–Ring
40:2 1–603992 1 O–Ring
44 104–8172 1 Decal–Mobil 1
* Not illustrated
11
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