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Kubota L3901 - User Manual

Kubota L3901
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KUBOTACorporation
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
Australia :KUBOTAAUSTRALIAPTYLTD.
25
-
29
PermasWay,Truɡanina,VIC
3029
,Australia
Telephone:(
61
)-
3
-
9394
-
4400
Malaysia :KUBOTAMALAYSIASDN.BHD.
No.
3
JalanSepadu
25
/
123
TamanPerindustrianAxis,
Seksyen
25
,
40400
ShahAlam,SelanɡorDarulEhsanMalaysia
Telephone:(
60
)
3
-
736
-
1388
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.
No.
15
,MedavakkamRoad,Sholinɡanallur,Chennai-
600119
,T.N.,India
Telephone:(
91
)
44
-
6104
-
1500
Vietnam :KUBOTAVIETNAMCO.,LTD.
LotB-
3
A
2
-CN,MyPhuoc
3
IndustrialPark,ThoiHoaWard,BenCatTown,BinhDuonɡProvince,Vietnam
Telephone:(
84
)-
274
-
3577
-
507
L3301
L3901
MODELS
OPERATOR'S MANUAL
1AGAPCAAP0010
English (U.S.A.)
Code No. TC620-1973-7
AX. G. 8-8. -. K
L3301·L3901
©
KUBOTA Corporation 2016
READ AND SAVE THIS MANUAL
PRINTED IN U.S.A.
1906-0976

Table of Contents

Questions and Answers

  • T
    Tom MclaughlinAug 19, 2025
    Why does my Kubota L3901 engine overheat?
    • C
      Courtney ValdezAug 19, 2025
      If your Kubota Tractor engine overheats, several factors could be responsible. It might be due to the engine being overloaded, in which case you should shift to a lower gear or reduce the load. A low coolant level can also cause overheating, so fill the cooling system to the correct level and inspect the radiator and hoses for any loose connections or leaks. A loose or defective fan belt can also lead to overheating, so adjust or replace the fan belt as necessary. Additionally, a dirty radiator core or grille screens can restrict airflow, so remove any trash. Finally, a corroded coolant flow route can impede cooling efficiency, so flush the cooling system.
  • J
    Joseph MclaughlinAug 22, 2025
    Why are the exhaust fumes from my Kubota Tractor colored?
    • E
      Erica LawrenceAug 22, 2025
      If the exhaust fumes from your Kubota Tractor are colored, it indicates a problem. Black exhaust fumes can be caused by poor fuel quality, too much oil, or a clogged air cleaner. To resolve this, change the fuel and fuel filter, check that the oil level is correct, and clean or replace the air filter element. Blue-white exhaust fumes may be due to fuel inside the exhaust muffler, a problem with the injection nozzle, or poor fuel quality. To address this, heat the muffler by applying a load to the engine, check the injection nozzle, and change the fuel and fuel filter.
  • D
    David MclaughlinAug 25, 2025
    How to start a Kubota L3901 Tractor that won't start?
    • J
      jenny46Aug 26, 2025
      If your Kubota Tractor is difficult to start or won't start, there could be several reasons. Begin by checking the fuel tank and fuel filter, replacing the filter if needed. Also, ensure the fuel-line-coupler bolt and nut are tight and bleed the fuel system if air or water is present. In cold weather, use appropriate viscosity oils or an engine-block-heater. Clean and charge the battery, storing it indoors when not in use. Lastly, check the preheat (glow plug) system's slow-blow-fuse.
  • J
    Jennifer GeorgeAug 28, 2025
    What to do if Kubota L3901 Tractor engine overheats?
    • S
      stephenkingAug 28, 2025
      If your Kubota Tractor engine overheats, several factors could be the cause. First, check if the engine is overloaded and shift to a lower gear or reduce the load. Then, verify the coolant level and inspect for leaks in the radiator and hoses. Also, ensure the fan belt is properly adjusted or replaced if damaged. Remove any trash from the radiator core or grille screens, and flush the cooling system to address potential corrosion.
  • J
    jamespearsonAug 31, 2025
    How to fix insufficient engine power in my Kubota L3901 Tractor?
    • B
      Brenda BurnsAug 31, 2025
      If your Kubota Tractor engine has insufficient power, it could be due to insufficient or dirty fuel, or a clogged air cleaner. Check the fuel system and clean or replace the air filter element.
  • C
    Craig MartinezSep 3, 2025
    Why does my Kubota L3901 have insufficient engine power?
    • J
      johnmartinSep 3, 2025
      If your Kubota Tractor has insufficient engine power, it could be due to insufficient or dirty fuel, so check the fuel system. Another possible cause is a clogged air cleaner, in which case you should clean or replace the air-cleaner-element.
  • A
    Amber MitchellSep 6, 2025
    Why are the exhaust fumes colored on my Kubota Tractor?
    • B
      Brandi ZimmermanSep 6, 2025
      Colored exhaust fumes from your Kubota Tractor can indicate several issues. Black fumes suggest poor fuel quality, so change the fuel and fuel filter. It could also mean there is too much oil, so check the oil level. Also, check if the air cleaner is clogged and clean or replace it. Blue white fumes could mean the exhaust muffler is damp from fuel, so heat the muffler by applying load to the engine. Finally, it could be a problem with the injection nozzle, so check the injection nozzle.
  • M
    Melissa TaylorSep 9, 2025
    What to do if my Kubota Tractor engine stops suddenly?
    • A
      April FosterSep 9, 2025
      If your Kubota Tractor engine stops suddenly, it might be due to insufficient fuel. Refuel and bleed the fuel system if necessary.
  • D
    Denise BowmanSep 12, 2025
    What to do if Kubota Tractor engine stops suddenly?
    • D
      Dawn GibsonSep 12, 2025
      If your Kubota Tractor engine stops suddenly, it's likely due to insufficient fuel. Refuel the tractor. If necessary, bleed the fuel system.
  • K
    Kimberly NelsonNov 15, 2025
    Why is my Kubota L3901 engine difficult to start?
    • R
      Russell MooreNov 15, 2025
      If your Kubota Tractor engine is difficult to start or won't start, it could be due to several reasons. First, check the fuel tank and fuel filter, replacing the filter if needed, as there might be no fuel flow. Air or water in the fuel system can also be a culprit; ensure the fuel line coupler bolt and nut are tight and bleed the fuel system. In cold weather, the oil viscosity increases, slowing the engine revolution, so use oils of different viscosities or consider using an engine block heater. A weak battery can also prevent the engine from turning over quickly enough; clean the battery cables and terminals, charge the battery, and in cold weather, remove the battery, charge it, store it indoors, and install it only when you're ready to use the tractor. Finally, there might be an issue ...

Kubota L3901 Specifications

General IconGeneral
Engine TypeDiesel
Engine Horsepower37.5 HP
3-Point HitchCategory I
Weight2, 623 lbs (Gear Drive), 2, 778 lbs (Hydrostatic)
Displacement111.4 cu in
Cylinders3
Displacement (cu in)111.4
Hydraulic System TypeOpen center
Width55.1 inches
Transmission TypeGear or HST
Fuel Capacity11.1 gal
Gears8 forward, 4 reverse (Gear)
Number of Gears8 forward, 4 reverse
Fuel Tank Capacity11.1 gal
Lift Capacity at 24"1433 lbs
Height91.7 inches
Tire Size (Front)7-16
Tire Size (Rear)11.2-24
Engine ModelD1803

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