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Kubota U25-3S - User Manual

Kubota U25-3S
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U.S.A. :KUBOTATRACTORCORPORATION
3401
DelAmoBlvd.,Torrance,CA
90503
,U.S.A.
Telephone:(
310
)
370
-
3370
Canada :KUBOTACANADALTD.
5900
14
thAvenue,Markham,Ontario,L
3
S
4
K
4
,Canada
Telephone:(
905
)
294
-
7477
France :KUBOTAEUROPES.A.S
19
-
25
,RueJulesVercruysse,Z.I.BP
88
,
95101
Ar㷅enteuilCedex,France
Telephone:(
33
)
1
-
3426
-
3434
Italy :KUBOTAEUROPES.A.SItalyBranch
ViaGrandi,
29
20068
PeschieraBorrome(MI)Italy
Telephone:(
39
)
02
-
51650377
Germany :KUBOTABAUMASCHINENGmbH
Steinhauserstr,
100
,
66482
ZweibruckenRheinlandpfalzGermany
Telephone:(
49
)
6332
-
4870100
U.K. :KUBOTA(U.K.)LTD.
DormerRoad,Thame,Oxfordshire,OX
9
3
UN,U.K.
Telephone:(
44
)
1844
-
214500
Australia :KUBOTATRACTORAUSTRALIAPTYLTD.
25
-
29
PermasWay,Tru㷅anina,VIC
3029
,Australia
Telephone:(
61
)-
3
-
9394
-
4400
Malaysia :SIMEKUBOTASDN.BHD.
No.
3
JalanSepadu
25
/
123
TamanPerindustrianAxis,
Seksyen
25
,
40400
ShahAlam,Selan㷅orDarulEhsanMalaysia
Telephone:(
60
)
3
-
736
-
1388
Philippines :KUBOTAPHILIPPINES,INC.
155
PanayAvenue,SouthTrian㷅leHomes,
1103
QuezonCity,Philippines
Telephone:(
63
)
2
-
9201071
Taiwan :SHINTAIWANAGRICULTURALMACHINERYCO.,LTD.
16
,Fen㷅pin㷅
2
ndRd,TaliaoShian㷅Kaohsiun㷅
83107
,TaiwanR.O.C.
Telephone:(
886
)
7
-
702
-
2333
Thailand :SIAMKUBOTACORPORATIONCO.,LTD.
101
/
19
-
24
Moo
20
,NavanakornIndustrialEstate,TambonKhlon㷅nuen㷅,AmphurKhlon㷅luan㷅,
Pathumthani
12120
,THAILAND
Telephone:(
66
)
2
-
909
-
0300
Japan :KUBOTACorporation
Farm&IndustrialMachineryInternationalOperationsHeadquarters
2
-
47
,Shikitsuhi㷅ashi
1
-chome,Naniwa-ku,Osaka,Japan
556
-
8601
WesternDivision :
1175
S.GuildAvc.,Lodi,CA
95240
Telephone :(
209
)
334
-
9910
CentralDivision :
14855
FAABlvd.,FortWorth,TX
76155
Telephone :(
817
)
571
-
0900
NorthernDivision :
6300
atOneKubotaWay,Groveport,OH
43125
Telephone :(
614
)
835
-
1100
SoutheastDivision :
1025
NorthbrookParkway,Suwanee,GA
30024
Telephone :(
770
)
995
-
8855

Table of Contents

Questions and Answers

  • C
    Caitlyn PierceAug 14, 2025
    Why is my Kubota U25-3S engine overheating?
    • J
      Joseph FloresAug 15, 2025
      If your Kubota Excavators engine is overheating, several factors could be responsible. Check for a worn or torn fan belt and adjust or replace it if needed. Ensure the coolant level is at the prescribed level. Clean any clogs from the radiator grill or fins. If the coolant is contaminated with rust, replace it and add anti-rust. A defective radiator cap can also cause overheating, so replace it if necessary. Clean corroded coolant pipes. Avoid continuous operation under full load and ensure the engine oil level is at the prescribed level. Finally, ensure you are using the prescribed fuel.
  • A
    Adam BryantAug 18, 2025
    How to troubleshoot starting difficulties in Kubota Excavators?
    • M
      Marcus CarterAug 18, 2025
      If your Kubota Excavators are hard to start, several factors could be the cause. The fuel might be too viscous; in this case, check the fuel tank and filter, remove any impurities and water, and replace the filter if necessary. There might be air or water in the fuel system; remove water from the fuel tank and check the fuel pipe joint bolts and nuts for looseness. Purge the fuel system. If the oil viscosity is too high, especially in winter, pour hot water over the radiator or use oils of different viscosities depending on the ambient temperature, such as SAE10W, SAE10W-30, or SAE10W-40. Lastly, a nearly dead battery or insufficient compression can cause starting difficulties, so recharge the battery.
  • M
    Michelle HarperAug 21, 2025
    What to do if Kubota Excavators engine suddenly stops?
    • M
      Miranda KirkAug 21, 2025
      If your Kubota Excavators engine suddenly stops, it might be due to a low fuel level. Check the fuel and add more if necessary. Also, purge the fuel system.
  • P
    Penny FordAug 25, 2025
    Why is the power too low in my Kubota U25-3S boom, arm, bucket, drive, swing and dozer?
    • L
      Lisa CherryAug 25, 2025
      If your Kubota Excavators lack power in the boom, arm, bucket, drive, swing, or dozer, it could be due to a low hydraulic oil level. Add oil to the system. Also, check for leakages in hoses and/or joints, and replace any leaking hose or joint.
  • W
    Wesley RoseAug 28, 2025
    Why does my Kubota Excavators engine have insufficient power?
    • M
      Mary DaviesAug 28, 2025
      If your Kubota Excavators engine has insufficient power, check the fuel level and add fuel if necessary. Also, inspect the air cleaner for clogs and clean the air filter element if needed.
  • J
    Jamie ParrishAug 31, 2025
    What causes abnormal exhaust gas color in Kubota U25-3S Excavators?
    • S
      Sandra WellsAug 31, 2025
      If the exhaust gas color is abnormal in your Kubota Excavators, it could be due to poor fuel quality. Use high-quality fuel. It could also be caused by too much engine oil, so drain the engine oil to the prescribed level.
  • J
    John KnightSep 4, 2025
    Why does the drive direction deviate in Kubota U25-3S Excavators?
    • L
      Lynn ArellanoSep 4, 2025
      If the drive direction of your Kubota Excavators deviates, it could be because the track is blocked by stones; remove them. Alternatively, the track may be too loose or too tight; adjust it accordingly.
  • L
    Logan GrahamSep 7, 2025
    What to do if swing motor and front attachment does not work in Kubota Excavators?
    • N
      Nicole AlvarezSep 7, 2025
      If the swing motor and front attachment of your Kubota Excavators do not work, check if the lock lever is in the "LOCK" position. If so, move the lock lever into the "UNLOCK" position.
  • R
    Ryan RichardsonSep 10, 2025
    What to do if the drive lever does not move in Kubota U25-3S?
    • K
      Kevin HarringtonSep 12, 2025
      If the drive lever of your Kubota Excavators does not move, check if the lock lever is in the "LOCK" position. If it is, bring the lock lever into the "UNLOCK" position.

Summary

Foreword and Safety Introduction

Safety First Symbol Explanation

Explains the safety alert symbol and warning levels: Danger, Warning, Caution, Important, Note.

Safe Operation Procedures

Before Operation Checklist

Steps and checks required before starting the excavator.

Starting the Excavator

Detailed procedure for safely starting the excavator engine.

Danger, Warning, and Caution Labels

Identification and understanding of safety labels present on the machine.

Dealer Service Information

Technical Specifications

Machine Parts Identification

Instrument Panel and Controls

Instrument Panel and Switches

Identification of indicators, lamps, and switches on the instrument panel.

Checks Before Starting Operation

Daily Checks

Daily inspection items to ensure proper machine condition before operation.

Handling Safety Devices

Procedures for handling safety devices, focusing on the control lever lock.

ROPS;OPG Safety Structure

Details on ROPS/OPG labels, specifications, and tightening torques.

Engine Operation

Starting the Engine

Step-by-step guide for starting the excavator engine.

Warning Lamps Explained

Explanation of Charge Lamp, Oil Lamp, and Glow Lamp functions.

Starting with Auxiliary Battery

Safety guidelines and procedure for starting with an auxiliary battery.

Excavator Operation

Running-In a New Excavator

Importance and procedures for the initial running-in period of the machine.

Operating Boom, Arm, Bucket, Dozer

How to operate the boom, arm, bucket, and dozer blade.

Driving the Excavator

Basic procedures and warnings for driving the excavator.

Turning Procedures

How to perform pivot turns while stationary and travelling.

Regular Checks and Maintenance Work

Every 50 Service Hours

Maintenance tasks to be performed every 50 service hours.

Battery Inspection and Charging

Procedures for battery inspection, charging, and safety.

Every 200 Service Hours

Maintenance tasks to be performed every 200 service hours.

Every 250 Service Hours

Maintenance tasks to be performed every 250 service hours.

Every 500 Service Hours

Maintenance tasks to be performed every 500 service hours.

Every 1000 Service Hours

Maintenance tasks to be performed every 1000 service hours.

Annual Servicing

Annual maintenance tasks including wiring and fuses.

Transporting the Excavator on a Truck

Lifting the Excavator Safely

Lifting Basics and Safety

Fundamental principles and safety aspects for lifting with cables or straps.

Lifting Procedure

Step-by-step procedure for lifting the excavator safely.

Maintenance Overview

Maintenance Intervals

A comprehensive table detailing maintenance tasks and their intervals.

Checking Fuel Level

Procedure to check the fuel level and important notes.

Checking Oil Levels

Procedures to check engine and hydraulic oil levels.

Lubrication Points

Identification of lubrication points and greasing procedures.

Other Adjustments and Replacements

Purging the Fuel System

Procedure to purge air from the fuel system.

Track Adjustment

Procedures for adjusting track tension for rubber and steel tracks.

Fuse Information

Information on replacing fuses and fuse capacities.

Troubleshooting Guide

Common Machine Problems

Guide to identifying and resolving common machine problems.

KUBOTA I.C.S. Error Messages

List of error messages displayed on the LCD and their meanings.

Operation in Cold Weather

Cold Weather Preparation

Steps to prepare the excavator for cold weather operation.

Post-Work Procedures (Cold Weather)

Procedures after work completion in cold weather.

Long Term Storage Procedures

Storage Guidelines

Steps for storing the excavator for extended periods.

Operation After Storage

Procedures for operating the machine after long-term storage.

Recommended Oils and Fluids

Main Dimensions

Lifting Capacity Information

Kubota U25-3S Specifications

General IconGeneral
BrandKubota
ModelU25-3S
CategoryExcavators
LanguageEnglish

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