Page 1

FormNo.3375-792RevB
TITAN
®
ZX4820Zero-Turn-Radius
RidingMower
ModelNo.74920—SerialNo.313000001andUp
Registeratwww.T oro.com.
OriginalInstructions(EN)
*3375-792*B
Page 2

OrderingReplacementParts
Toorderreplacementparts,pleasesupplythepartnumber,
thequantity,andthedescriptionofeachpartdesired.
UnderstandingReferenceNumbers
Eachidentiedpartinanillustrationhasareference
number.Thereferencenumberforapartalsoappearsin
thepartslist,alongwithotherinformationaboutthepart.
Thiscatalogusestwospecialreferencenumberformats,
onetoindicatepartsinaserviceassemblyandanotherto
indicatethequantityofagivenpartinanillustration.
ServiceAssemblyReferenceNumbers
Partsinserviceassemblieshavereferencenumbersinthe
forma:b.Thearepresentsthereferencenumberofthe
entireserviceassemblyandthebrepresentsasequential
numberuniquetoeachpartwithintheserviceassembly.
ListofAbbreviations
AR:asrequired
ASM:assembly
BBC:bladebrakecontrol
BHTF:buttonheadthreadforming
CARR:carriage
CCW:counterclockwise
CW:clockwise
DEG:degrees
DPA:DualPointAdjustment
ECM:electroniccontrolmodule
EXT:external
FH:athead
GA:gauge
HD:heavy-duty
HF:hexange
HH:hexhead
HHF:hexheadange
HHFTF:hexheadangethread
forming
HJ:hexjam
HLH:hexlaghead
HOC:height-of-cut
HSBH:hexsocketbuttonhead
HSFH:hexsocketathead
HSH:hexsockethead
HWH:hexwasherhead
HWHTF:hexwasherheadthread
forming
HYD:hydraulic
LH:lefthand
LP:LiqueedPetroleumGas
LPG:LiqueedPetroleumGas
NI:nyloninsert
NPTF:nationalpipethreadne
PFH:phillipsathead
PPH:phillipspanhead
PPHTF:phillipspanheadthread
forming
PRH:phillipsroundhead
PTH:phillipstrusshead
Forexample,awheelassemblymightbeidentiedby
referencenumber6,thetireby6:1,thevalveby6:2,and
thewheelby6:3.Whenyouordertheassemblyidentied
byreferencenumber6,youreceiveallpartsidentiedby
referencenumbers6:1,6:2,and6:3.However,youmay
alsoorderanypartindividually .Referencenumbersofthis
typeappearinillustrationandinpartslists.
ReferenceNumbersIndicatingQuantity
Inanillustration,ifareferencenumberindicatesmorethan
onepart,thereferencenumberhastheformnXy .Then
representsthequantityofthepart,theXisthemultiplication
symbol,andtheyrepresentsthereferencenumber.
Forexample,inanillustration,thereferencenumber2X37
meansthattwoofthepartsidentiedbyreferencenumber
37areindicated.
PTO:power-take-off
RH:righthand
ROPS:roll-overprotectionsystem
RRB:rearrollerbrush
SFH:slottedllisterhead
SHH:slottedhexhead
SHWH:slottedhexwasherhead
SPH:slottedpanhead
SQH:squarehead
SRH:slottedroundhead
STD:standard
TAP:selftapping
TTH:torxtrusshead
2
Page 3

Contents
Frame,FrontAxleandCasterWheelAssembly.................................................................4
WheelandTireAssemblyNo.125-1822.......................................................................5
WheelandTireAssemblyNo.115-2554.......................................................................6
ControlPanelandBodyStylingPodAssembly..................................................................7
DeckLiftAssembly..........................................................................................8
TractionDriveAssembly.....................................................................................9
RHHydroAssemblyNo.115-2550...........................................................................10
LHHydroAssemblyNo.115-2551...........................................................................12
MotionControlAssembly...................................................................................14
BrakeLinkAssembly.......................................................................................16
Engine,MuferandClutchAssembly.........................................................................17
FuelDeliveryAssembly.....................................................................................18
MultiLayerFuelT ankAssemblyNo.117-7352.................................................................19
Roll-OverProtectionSystemAssembly.......................................................................20
ElectricalAssembly........................................................................................21
48InchDeckAssembly.....................................................................................22
48InchDeckDecalAssemblyNo.119-3383...................................................................23
48InchDeckBafeandGuardAssembly.....................................................................24
48InchDeck,BeltandMulchBladeAssembly.................................................................25
SeatAssembly............................................................................................26
AttachmentsandAccessories...............................................................................27
©2013—TheToro®Company
8111LyndaleAvenueSouth
Bloomington,MN55420
Contactusatwww.T oro.com.
3
PrintedintheUSA.
AllRightsReserved
Page 4

Frame,FrontAxleandCasterWheelAssembly
Ref.
3375-792B4A2
PartNumber
1117-7356-011Frame
2115-2531-051Pan-Floor
332144-708
4120-54661
5
125-18222
5
115-25542
6104-36672
7
325-222
83296-452Nut-Lock,NI
9110-6634-012
1010-81102Washer-Thrust
11109-36784Bearing-Ball
12109-37242Washer
133234-472
14119-8997-031
Qty.Description
Screw-HWHTF
Decal-Safety
TireAndWheelASM(CST)
TireAndWheelASM
(Kenda)
Spanner-Wheel
Screw-HH
CasterForkASM
Screw-HHF
Support-Seat
Ref.
PartNumber
15322-122
16104-83006Nut-Flange,NI
17120-2248-031
1862-55501Decal
19105-82781Decal
20121-0704-011
21322-102
22121-29802
23117-12411
24117-12421
2546-85602
30117-72381
31117-72201
32120-2247-031
33322-232
343256-234Washer-Flat
Qty.Description
Screw-HH
Guard-Rear
Tube-Guard
Screw-HH
Cap
Cover-Fan,RH
Cover-Fan,LH
Screw-HHFTF
Strip-Vibration,Anti
Foil-HeatShield
Guard-Mufer
Screw-HH
Page 5

WheelandTireAssemblyNo.125-1822
Ref.
A2A153375-792B
PartNumber
2125-18231Tire
3114-16402Bushing-Flange
4232-271
5
302-51
99117-12341Tube-Inner
Qty.Description
Stem-Valve
Fitting-Grease
Page 6

WheelandTireAssemblyNo.115-2554
Ref.
3375-792B60
PartNumber
2115-25571
3114-16402Bushing-Flange
4232-271
5
302-51
99117-12341Tube-Inner
Qty.Description
Tire-Smooth
Stem-Valve
Fitting-Grease
Page 7

ControlPanelandBodyStylingPodAssembly
Ref.
B273375-792B
PartNumber
1115-25811Pod-RH
2115-25821Pod-LH
3115-96321
4121-07701
5
3258-1664
61070694
7
115-2591-031
8120-79506
9120-22911
103253-211Washer-Lock
113220-31Nut-HJ
12105-18532
Qty.Description
Decal-Panel,Control
Cable-Throttle
Screw-PRH
Clip
Panel-Control
Screw-Shoulder
Cable-Choke
Clamp-Hose
Page 8

DeckLiftAssembly
Ref.
3375-792B8C2
PartNumber
1115-2495-031Pivot-Front
2115-2498-031Pivot-Rear
3117-12811
4115-49863
5
115-2503-032
6115-25041
7
65-59504Bushing-Pulley
81-6332681
9115-50654Bushing-Flange
103231-4
Qty.Description
7
Bushing-Mount,HOC
Spacer
Plate-Lift,Foot
Plate-Stop,HOC
Grip-Lever
Screw-CARR
Ref.
PartNumber
11104-83018Nut-Flange,NI
12323-71
13322-68
14104-83008Nut-Flange,NI
15117-12801Pin-Keyed
16115-96441
17117-53441Decal-Lock,Deck
183231-11
19116-28874
Qty.Description
Screw-HH
Screw-HH
Decal-HOC
Screw-CARR
Gusset-DeckLift
Page 9

TractionDriveAssembly
Ref.
E293375-792B
PartNumber
1115-25501RHHydroTransmission
2115-25511LHHydroTransmission
3110-99811Washer-Plain
4115-49861
5
114-04632
6117-53501Arm-Idler
7
104-83013Nut-Flange,NI
9109-33972Pulley-Idler,Flat
101-6034021
113231-42
12323-121
13109-36522
14115-25591
15322-134
16104-83008Nut-Flange,NI
17322-382
18322-112
Qty.Description
ASM
ASM
Spacer
Washer-Friction,Composite
Spring-Extension
Screw-CARR
Screw-HH
Spacer-Hydro
Shaft-Cross,Hydro
Screw-HH
Screw-HH
Screw-HH
Ref.
23:1109-54871Wheel
23:2109-54881Tire
26:2109-33201
PartNumber
19323-102
201-8060032
21115-49902Rod-Bypass
223256-222Washer-Flat
23109-54862
24242-508Nut-Lug
25115-96131V-Belt
26115-96181
27115-49692
28117-11934
2946-85602
30117-11582Decal-Bypass
313256-238Washer-Flat
32117-53511
33117-7248-032
341107692
Qty.Description
Screw-HH
Pin-Cotter,Hair
WheelAndTireASM
HYDReserviorASM
Cap-Reservoir,HYD
Hose-Overow
Clamp-Hose
Screw-HHFTF
Spacer
Plate-Spring
Spring-Extension
Page 10

RHHydroAssemblyNo.115-2550
3375-792B102
Page 11

RHHydroAssemblyNo.115-2550(continued)
Ref.
PartNumber
1117-53571RHMainHousingKit
2117-53581
7
117-535916
11104-21891
23109-33211
32114-16851Rod-Bypass
34107-24901Arm-Bypass
40104-53041
41104-53131
42104-21161
43112-98531Puck-Friction
45114-84911Washer
55
104-53081
60112-41541Bearing-Thrust
64114-16891
6594-69221Bearing-Thrust
69110-85611
70104-53391Washer-Flat
72114-16901
73114-16911
74104-53601Washer
8094-19331Washer
81114-16921
Qty.Description
HousingSideKit
Screw-HHF
Plug-Thread,Straight
Element-OilFilter,HYD
Swashplate-Trunnion
Seal-Lip
Stud
Spacer
MotorCylinderBlockKit
PumpBlockASM
Gear-14T
Shaft-Motor
Gear-45T
Ref.
100114-16971Pawl-Brake
101120-79771
102125-00211Handle-Brake
105104-21203
106120-79811
156115-50571
200109-35371
201114-84631
202114-84641
203114-84651
207125-00591FanAndPulleyKit
209114-84671Hub-Puller,4Bolt
210117-53611
211117-53621
212114-84701
PartNumber
82114-16931
83104-53291
91114-16941
92120-79751
93114-16961Bearing-Ball
95120-79761Bearing-Ball
97109-59391HubKit
111109-32781
Qty.Description
Gear-11T
Pin-Jackshaft
Gear-54T
Spacer
BrakeShaftKit
Screw
Guard-Filter,RH
Adapter-Straight
Cover-Nut,Axle
CompleteSealKit
RHCenterSectionKit
ChargeReliefKit
ChargeKit
ShaftInputKit
ArmControlKit
AxleShaftKit
113375-792B
Page 12

LHHydroAssemblyNo.115-2551
3375-792B122
Page 13

LHHydroAssemblyNo.115-2551(continued)
Ref.
PartNumber
1114-84711MainHousingKit
2114-84721
7
117-535916
11104-21891
23109-33211
32114-16851Rod-Bypass
34107-24901Arm-Bypass
40104-53041
41104-53131
42104-21161
43112-98531Puck-Friction
45114-84911Washer
55
104-53081
60114-16881Bearing-Thrust
64114-16891
6594-69221Bearing-Thrust
69110-85611
70104-53391Washer-Flat
72114-16901
73114-16911
74104-53601Washer
8094-19332Washer
81114-16921
Qty.Description
SideCoverKit
Screw-HHF
Plug-Thread,Straight
Element-OilFilter,HYD
Swashplate-Trunnion
Seal-Lip
Stud
Spacer
MotorCylinderBlockKit
PumpBlockASM
Gear-14T
Shaft-Motor
Gear-45T
Ref.
100114-16971Pawl-Brake
101120-79771
102125-00211Handle-Brake
105104-21203
106120-79791
156115-50571
200109-35371
201114-84761
202114-84641
203114-84651
207125-00591FanAndPulleyKit
209114-84671Hub-Puller,4Bolt
210117-53611
211117-53621
212114-84701
PartNumber
82114-16931
83104-53291
91114-16941
92120-79751
93114-16961Bearing-Ball
95120-79761Bearing-Ball
97109-59391HubKit
111109-32781
Qty.Description
Gear-11T
Pin-Jackshaft
Gear-54T
Spacer
BrakeShaftKit
Screw
Guard-Filter,LH
Adapter-Straight
Cover-Nut,Axle
CompleteSealKit
LHCenterSectionKit
ChargeReliefKit
ChargeKit
ShaftInputKit
ArmControlKit
AxleShaftKit
133375-792B
Page 14

MotionControlAssembly
3375-792B14F2
Page 15

MotionControlAssembly(continued)
Ref.
PartNumber
1115-2546-031
2120-79502
3110-68282
3:2105-34552Bushing
4106-22142
5
109-23392
63296-424Nut-Lock,NI
7
46-85604
83296-482Nut-Lock,NI
9119-89522Washer
1032128-232Nut-HF
113256-52Washer-Flat
12117-74222
13117-74232
141-8082802
151-8060032
163256-232Washer-Flat
17110-6783-051Arm-Actuator,LH
18110-6782-051Arm-Actuator,RH
19115-50232
20110-68732Eccentric
21110-68742
22110-68752
Qty.Description
Box-Control
Screw-Shoulder
ActivatorArmASM
Bolt-Shoulder
Damper-Control,Motion
Screw-HHFTF
Rod-Control
Bracket-Control
Pin-Clevis
Pin-Cotter,Hair
Tab-Stop
Screw-Eccentric
Bolt-Shoulder
Ref.
41:1121-07261
42:1121-07261
PartNumber
23110-67512Bracket-Return
24110-67502Plate-Return
25110-67522
26110-68946Washer-Pivot
27323-42
28110-67842
2937-87712
30104-83004Nut-Flange,NI
31112-97712
32117-72371
33117-1255-031
341-6038072
35115-2561-031
36115-96251Decal
3799-89362
38119-89831Decal
393256-244Washer-Flat
40323-64
41121-07311
42121-07301
Qty.Description
Spring-Compression
Screw-HH
Bolt-Shoulder
Bolt-Shoulder
Washer-T eon
Strip-Vibration,Anti
Cover-Control,RH
Spring-Return,Neutral
Cover-Control,LH
Decal-Control,Motion
Screw-HH
Handle-Control,RH
Grip
Handle-Control,LH
Grip
153375-792B
Page 16

BrakeLinkAssembly
Ref.
3375-792B16F3
PartNumber
1119-34601Handle-Brake
263-26501
3115-5071-031Brake-Bellcrank
4115-50741Link-Brake
5
117-73221Rod-Brake,LH
6117-73231Rod-Brake,RH
7
115-96812Fitting-Rod
81-6332681
9104-8300
10256-2922Bushing-Flange,NI
Qty.Description
5
Screw-Shoulder
Grip-Lever
Nut-Flange,NI
Ref.
PartNumber
111-8060038
123256-234Washer-Flat
131-6038072
143272-112
153256-272Washer-Flat
1640-19402Washer
1732144-704
183234-472
19106-97582
Qty.Description
Pin-Cotter,Hair
Spring-Return,Neutral
Pin-Cotter
Screw-HWHTF
Screw-HHF
Screw-CARR
Page 17

Engine,MuferandClutchAssembly
Ref.
PartNumber
11Engine-Kawasaki,
1:11-6533132
1:2114-35494Nut
1:3114-35504
3117-74651
4115-25681Pulley-Engine
5
117-7344-031
6117-12521
●
Notservicedseparately
G2173375-792B
Qty.Description
Fr651V-S52-R
Gasket-Exhaust
Washer-Lock,Spring
Mufer-KawasakiTwin
Bracket-Stop,PTO
Clutch-PTO
Ref.
PartNumber
83212-111
●■
9323-504Bolt-HH
10117-7335-031
11104-83001Nut-Flange,NI
12104-83013Nut-Flange,NI
14110-99811Washer-Plain
153234-471
16106-70221
17323-63
■
Obtainpartsfromwww.kawpowerepc.com
Qty.Description
Screw-HH
Tube-Stiffener
Screw-HHF
Tube-Drain,Oil
Screw-HH
Page 18

FuelDeliveryAssembly
Ref.
3375-792B18J2
PartNumber
1117-73521
2114-37651Hose-Fuel
351-32121Hose-Fuel
6121-07431
92412-982
1046-85601
11125-18471
126142492
13107-05891Hose-Fuel
14115-26201
15117-12981
Qty.Description
MultiLayerFuelTankASM
Adapter-Orice
Clamp-Hose
Screw-HHFTF
Cap-Fuel
Tie-Cable
Rod-Tank,Gas
Seal-Tank
Page 19

MultiLayerFuelTankAssemblyNo.117-7352
Ref.
J2A2193375-792B
PartNumber
1121-07931
246-65602Bushing
4117-74001Fitting-Plastic
Qty.Description
Connector-Elbow,90DEG
Page 20

Roll-OverProtectionSystemAssembly
Ref.
11:2107-30691Decal-Warning,Folding
3375-792B20K2
PartNumber
1121-2986-032
2115-4962-032
3115-4963-032
484-15604Washer-Thrust
5
325-182
6325-148
7
325-52
8109-66532
9119-8911-034
10119-8926-034
11119-89911
Qty.Description
Tube-ROPS,Lower
Tube-Support,ROPS
Bracket-Reinforcing
Screw-HH
Screw-HH
Screw-HH
Spacer
Bracket-Pivot,ROPS
Spacer-ROPS
UpperROPSASM
ROPS
Ref.
PartNumber
12119-89702
133256-264Washer-Flat
14114-19252Bumper-Rubber
15104-83002Nut-Flange,NI
16119-89692Nut-Hex
1899-510710Nut-Lock
191-5136582Bumper
20115-5038-031
21115-5060-031
223234-382
23109-98051
Qty.Description
Pin-ROPS
Bracket-SeatBelt
Bracket-SeatBelt
Screw-HHF
SeatBeltKit
Page 21

ElectricalAssembly
Ref.
12:11091031Fuse-Blade,30Amp
12:21091021Fuse-Blade,25Amp
L2213375-792B
PartNumber
1105-16921Battery
2117-22211
363-83601
4103-52211
5
110-67652
6100-35241
7
117-11971
8117-53421
9117-72401
10117-7313-011
11321-42
12121-30151Harness-Wire
Qty.Description
Switch-Ignition
Key-Ignition(W/Shield)
Switch-PTO
Switch-SinglePoleNo
Switch-Seat
Solenoid
Cable-Battery,Positive
Cable-Battery,Negative
Strap-Battery
Screw-HH
Ref.
12:3100-49181
PartNumber
133256-222Washer-Flat
1432144-1
1592-69891Wire-21Inch
1632128-333Nut-HF
1798-72491Relay
1846-85602
193220-22Nut-Jam
22120-22441Hourmeter
2399-74081
24117-1283-031Tray-Battery
251-6336511Bolt-Holddown
261-5437921Wingnut
2733104-0161
Qty.Description
Diode-OverMolded
5
Screw-Taptite
Screw-HHFTF
Switch-Reverse
Screw-HHF
Page 22

48InchDeckAssembly
Ref.
3375-792B22M2
PartNumber
1119-3383148InchDeckAndDecal
2117-7396-031
3117-7397-031
432144-702
5
115-26222
63256-262Washer-Flat
7
1-8060052Pin-Hair
8112-39773
9104-83013Nut-Flange,NI
101-6032993
11117-7367-031Plate
12115-24702Pin-Latch
131018532
143256-242Washer-Flat
153272-103
Qty.Description
ASM
Cover-Belt,RH
Cover-Belt,LH
Screw-HWHTF
Link-Lift
Bolt-Shoulder
Roller-Scalp,Anti
Spring-Compression
Pin-Cotter
Ref.
PartNumber
163256-682Washer-Flat
17114-1648-031
18117-12701
19115-5048-031
20117-7418-031
213230-34
223230-224
23104-83008Nut-Flange,NI
24109-88541
25121-29831
2695-27472Fitting-Washout
2746-62902
2846-85604
3193-70091
32119-23681Decal-Recycler
Qty.Description
Bracket-Deector,Upper
Deector-Molded
Plate-Deector
Bafe-Cutoff
Screw-CARR
Screw-CARR
Pin-Chute
Spring-Torsion
O-Ring,Seal
Screw-HHFTF
Decal-Danger,Deector
Page 23

48InchDeckDecalAssemblyNo.119-3383
Ref.
M2A3233375-792B
PartNumber
2114-16062Decal-Danger
393-70091
4110-66912Decal-Danger
5
112-98401
6117-11941Decal-Routing,Belt
Qty.Description
Decal-Danger,Deector
Decal-Scalp,Anti
Page 24

48InchDeckBafeandGuardAssembly
Ref.
3375-792B24M3
PartNumber
6119-3389-032Kicker-Flanged
7
104-83008Nut-Flange,NI
8117-7379-031
9117-7380-031
1032144-704
113230-14
12119-3352-031
Qty.Description
RHBafeASM
LHBafeASM
Screw-HWHTF
Bolt-CARR
Guard-Bafe
Page 25

48InchDeck,BeltandMulchBladeAssembly
Ref.
M4253375-792B
PartNumber
17-41503Washer
2120-54773
2:2116-07202Bearing-Ball
2:3115-26411
332144-4118
4117-72103
5
115-26423
6117-73263Pulley
7
1-6034011
8117-7278-033Blade-Mulch,16.50Inch
9125-17363Washer-Belleville
1051-40603
113219-73Nut-Hex
Qty.Description
SpindleASM
Spacer-Bearing
Screw-Taptite
Shield-Bearing
Shaft-Spindle
Spacer-Fender
Screw-Blade
Ref.
PartNumber
12110-99813Washer-Plain
13114-04632
141-4130881
15115-50541Arm-Idler
16323-101
17104-83013Nut-Flange,NI
18115-25773Bushing-Idler
19116-36263Pulley-Idler
203231-61
2180-69902Washer-Hardened
22323-93
23108-40561
24117-73251V-Belt
Qty.Description
Washer-Friction,Composite
Bushing-Lever,Lift
Screw-HH
Screw-CARR
Screw-HH
Spring-Extension
Page 26

SeatAssembly
Ref.
3375-792B26D2
PartNumber
1117-5320-031
2115-50531
2:5119-33071ArmrestKit
37011783
43234-473
5
92-70543
6104-83003Nut-Flange,NI
7
115-49661
83290-2502Pin-Hair
9115-96301Decal-Maintenance
10115-96231
11115-96241
12323-41
13117-53071
Qty.Description
Pan-Seat
18InchSeatASM
Cap-Protector
Screw-HHF
Spring-Compression
Rod-Stop
Latch-Seat
Spring-Compression
Screw-HH
Washer-Seat
Page 27

AttachmentsandAccessories
For74920TITANZX4820Zero-Turn-RadiusRidingMower
ProductName
StepKit.............................................................................................................................................117-5316
LightKit.............................................................................................................................................117-5317
TransportSeatHoldDownKit...........................................................................................................117-7251
48inStripingKit.................................................................................................................................119-3380
LeafBaggingEnhancementKit........................................................................................................119-3381
48inBaggerFinishingKit(Usedwith79328Bagger).......................................................................121-5662
HitchKit................................................................................................................................................79014
CargoCarrier........................................................................................................................................79032
FrontWeightKit....................................................................................................................................79033
BaggerKit.............................................................................................................................................79328
Model/Part
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