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Kubota L3902 - User Manual

Kubota L3902
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2105-0734
U.S.A. : KUBOTATRACTORCORPORATION
1000
KubotaDrive,Grapevine,TX
76051
Telephone :
888
-
4
KUBOTA
Canada : KUBOTACANADALTD.
5900
14
thAvenue,Markham,Ontario,L
3
S
4
K
4
,Canada
Telephone : (
905
)
294
-
7477
France : KUBOTAEUROPES.A.S
19
-
25
,RueJulesVercruysse,Z.I.BP
88
,
95101
ArɡenteuilCedex,France
Telephone : (
33
)
1
-
3426
-
3434
Italy : KUBOTAEUROPES.A.SItalyBranch
ViaGrandi,
29
20068
PeschieraBorrome(MI)Italy
Telephone : (
39
)
02
-
51650377
Germany : KUBOTA(DEUTSCHLAND)GmbH
SenefelderStr.
3
-
5
63110
Rodɡau/Nieder-Roden,Germany
Telephone : (
49
)
6106
-
873
-
0
U.K. : KUBOTA(U.K.)LTD.
DormerRoad,Thame,Oxfordshire,OX
9
3
UN,U.K.
Telephone : (
44
)
1844
-
214500
Spain : KUBOTAESPAÑAS.A.
AvenidaRecombaNo.
5
,PoliɡnoIndustriallaLaɡuna,Leɡanes,
28914
(Madrid)Spain
Telephone : (
34
)
91
-
508
-
6442
Turkey : KubotaTurkeyMakineTic.Ltd.Şti.
CumhuriyetMah.YahyaKaptanCad.No:
3
Cayirova/Kocaeli/Turkey
41420
Telephone : (
90
)
262
-
658
-
9045
Australia : KUBOTAAUSTRALIAPTYLTD.
25
-
29
PermasWay,Truɡanina,VIC
3029
,Australia
Telephone : (
61
)-
3
-
9394
-
4400
Malaysia : KUBOTAMALAYSIASDN.BHD.
Lot
766
,JalanSubanɡ
4
,oPersiaranSubanɡSunɡaiPenaɡaIndustrialPark,
47500
SubanɡJaya
Telephone : (
60
)-
3
-
7890
-
3533
Philippines : KUBOTAPHILIPPINES,INC.
232
QuirinoHiɡhway,Baesa,QuezonCity
1106
,Philippines
Telephone : (
63
)
2
-
422
-
3500
Taiwan : SHINTAIWANAGRICULTURALMACHINERYCO.,LTD.
16
,Fenɡpinɡ
2
ndRd,TaliaoShianɡKaohsiunɡ
83107
,TaiwanR.O.C.
Telephone : (
886
)
7
-
702
-
2333
Indonesia : PTKUBOTAMACHINERYINDONESIA
TowerAatEiɡhtyEiɡht@KasablankaLantai
16
JalanRayaCasablankaKav.
88
,Jakarta
12870
Indonesia
Telephone : (
62
)-
21
-
29568
-
720
Thailand : SIAMKUBOTACORPORATIONCO.,LTD.
101
/
19
-
24
Moo
20
,NavanakornIndustrialEstate,TambonKhlonɡnuenɡ,AmphurKhlonɡluanɡ,
Pathumthani
12120
,THAILAND
Telephone : (
66
)
2
-
909
-
0300
Korea : KUBOTAKOREACO.,LTD.
41
-
27
,Jayumuyeok-ɡil,Baeksan-myeon,Gimje-si,Jeollabuk-do,Korea
Telephone : (
82
)-
63
-
544
-
5822
India : KUBOTAAGRICULTURALMACHINERYINDIAPVT.LTD.
B
500
A&C,IndospaceIndustrialPark,
104
PolivakkamVillaɡe,
Sriperumbadur-ThiruvallurMainRoad,ThiruvallurDistrict-
602
002
.
Telephone : (
91
)
44
-
4019
-
2000
Vietnam : KUBOTAVIETNAMCO.,LTD.
LotB-
3
A
2
-CN,MyPhuoc
3
IndustrialPark,ThoiHoaWard,BenCatTown,BinhDuonɡProvince,Vietnam
Telephone : (
84
)-
274
-
3577
-
507
READ AND SAVE THIS MANUAL
OPERATOR'S MANUAL
AZ. L. 1-1. -. K
L3302L3902
©
KUBOTA Corporation 2021
L3302
L3902
MODELS
1MGHW00001000
English (U.S.A.)
Code No. TC820-1973-1

Table of Contents

Questions and Answers

  • B
    brownvictorAug 10, 2025
    Why is my Kubota L3902 Tractor engine difficult to start?
    • D
      dyoungAug 10, 2025
      Your Kubota Tractor engine might be hard to start due to several reasons: a lack of fuel flow (check the fuel tank and filter, replacing the filter if needed), air or water in the fuel system (ensure fuel-line coupler bolts and nuts are tight and bleed the fuel system), increased oil viscosity in winter (use different viscosity oils or an engine-block heater), a weak battery (clean cables and terminals, charge the battery, and store it indoors in cold weather), or a preheat system issue (check the slow-blow fuse).
  • J
    John FullerAug 18, 2025
    What to do if Kubota Tractor engine overheats?
    • J
      Jesse Thornton Jr.Aug 18, 2025
      If your Kubota Tractor engine overheats, it could be due to the engine being overloaded (shift to a lower gear or reduce the load), a low coolant level (fill the system and check for leaks), a loose or damaged fan belt (adjust or replace it), a dirty radiator (remove any trash), or a corroded coolant flow route (flush the cooling system).
  • M
    Michael ChenAug 26, 2025
    Why are exhaust fumes colored on my Kubota Tractor?
    • T
      Timothy WolfeAug 26, 2025
      Colored exhaust fumes from your Kubota Tractor can indicate several issues: * Black fumes: Poor fuel quality (change the fuel and filter), too much oil (check the oil level), or a clogged air cleaner (clean or replace the element). * Blue white fumes: Fuel-damped exhaust muffler (heat the muffler by applying load to the engine), injection nozzle trouble (check the nozzle), or poor fuel quality (change the fuel and filter).
  • A
    Angie CooleySep 1, 2025
    Why does my Kubota L3902 have insufficient engine power?
    • R
      rleSep 1, 2025
      Insufficient engine power in your Kubota Tractor can stem from insufficient or dirty fuel (check the fuel system) or a clogged air cleaner (clean or replace the air-cleaner element).

Summary

SPECIFICATIONS

SPECIFICATION TABLE

Detailed technical specifications for the tractor models.

IMPLEMENT LIMITATIONS

IMPLEMENT LIMITATION TABLES

Guidelines on compatible implements and their weight/size limits.

INSTRUMENT PANEL AND CONTROLS

INSTRUMENT PANEL, SWITCHES, AND HAND CONTROLS

Identification and function of dashboard instruments, switches, and controls.

Instrument panel

Detailed layout and function of the main instrument panel indicators.

FOOT CONTROLS AND HAND CONTROLS

Location and function of foot pedals and hand levers.

1. Foot controls and hand controls [Manual transmission type]

Identification of controls for manual transmission models.

2. Foot controls and hand controls [HST type]

Identification of controls for HST models.

PRE-OPERATION CHECK

DAILY CHECK ITEMS BEFORE OPERATION OF THE TRACTOR

Essential pre-operation checks for safety and performance.

2. Checking the fuel tank and refueling

How to check fuel level and refuel safely.

5. Checking the engine oil level

Procedure for checking the engine oil level.

6. Checking the transmission fluid level

How to check the transmission fluid level.

7. Checking the coolant level

Procedure for checking the engine coolant level.

12. Checking the gauges, the meters, and the Easy Checker

Inspecting instrument panel gauges and indicators.

OPERATING THE ENGINE

PRECAUTIONS FOR OPERATING THE ENGINE

Safety guidelines and precautions before starting and operating the engine.

STARTING THE ENGINE [MANUAL TRANSMISSION TYPE]

STARTING THE ENGINE [HST TYPE]

OPERATING THE TRACTOR

POWER TAKE-OFF (PTO)

Operation and precautions related to the Power Take-Off system.

3-POINT HITCH AND DRAWBAR

Information on the 3-point hitch and drawbar systems.

MAINTENANCE

SERVICE INTERVALS

Recommended maintenance schedule based on hours or time.

LUBRICANTS, FUEL, AND COOLANT

Specifications for fluids, fuels, and greases used in the tractor.

PERIODIC SERVICE

DAILY CHECK

Essential pre-operation checks for safety and performance.

Checking the engine oil level

Procedure for checking the engine oil level.

Checking the transmission fluid level

How to check the transmission fluid level.

Checking the coolant level

Procedure for checking the engine coolant level.

Changing the engine oil

Procedure for changing the engine oil and filter.

TROUBLESHOOTING

ENGINE TROUBLESHOOTING

Identifying causes and solutions for engine-related problems.

Kubota L3902 Specifications

General IconGeneral
Engine Horsepower37.5 HP
Cylinders3
Drive4WD
3-Point Hitch CategoryCategory I
Hydraulic System TypeOpen Center
Engine TypeDiesel
PTO Horsepower30.8 HP
Displacement111.4 cu. in. (1.826 L)
Transmission TypeGear shift or HST
Number of Gears8F / 8R (Gear Shift)
Fuel Tank Capacity11.9 gal (45 L)
Length121.1 in (3076 mm)
Width55.1 inches
Height91.7 in (2329 mm)
Tire Size (Front)7-16
Tire Size (Rear)11.2-24

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