Kubota KX057-4 U55-4 User Manual (English)

Questions and Answers:

B
Brian GreenAug 15, 2025
Why is my Kubota KX057-4 U55-4 Excavators engine not starting?
- N
  Nicholas SimsAug 15, 2025
  If you're experiencing starting difficulties with your Kubota Excavators, here are a few potential causes and solutions: * Ensure the lock levers are in the "LOCK" position, not "UNLOCK". * Check for viscous fuel in the fuel tank and filter, remove any impurities or water, and replace the filter if needed. * Inspect the fuel system for air or water, remove any water from the fuel tank, check fuel pipe joint bolts and nuts for looseness, and purge the fuel system. * If the engine runs sluggishly in winter, the oil viscosity may be too high; pour hot water over the radiator. * If the battery is weak, recharge it.
S
Samuel HawkinsAug 19, 2025
What to do if Kubota Excavators engine suddenly stops?
- A
  arielwalkerAug 19, 2025
  If your Kubota Excavators engine suddenly stops, check the fuel level and add fuel if necessary. Also, purge the fuel system.
S
Shelly SmithAug 22, 2025
Why is my Kubota Excavators overheating and the water temperature is in the red zone?
- J
  Jim WiseAug 22, 2025
  If your Kubota Excavators is overheating, with the water temperature in the red zone, it could be due to: * A damaged cylinder head gasket causing coolant loss: Replace the gasket. * Low engine oil level: Fill to the recommended level. * Maladjustment of fuel injection: Readjust the ignition timing. * Use of poor fuel: Switch to the prescribed fuel.
M
Maureen AndrewsAug 26, 2025
Why does Kubota Excavators have insufficient engine power?
- K
  Keith HickmanAug 26, 2025
  If your Kubota Excavators has insufficient engine power, it may be due to a low fuel level. Check the fuel and add if necessary. Another possible cause is a clogged air cleaner; in this case, clean the air filter element.
L
leeamandaAug 28, 2025
What to do if boom, arm, bucket, drive, swing and dozer power is too low in Kubota KX057-4 U55-4 Excavators?
- S
  Scott SteeleAug 28, 2025
  If the boom, arm, bucket, drive, swing, and dozer power is too low in your Kubota Excavators, it could be due to a low hydraulic oil level. Add oil to the system. Another possible cause is leakages in hoses or joints, in which case you should replace the hose or joint.
K
Katie WagnerSep 1, 2025
What does it mean if Kubota Excavators exhaust gas color is abnormal?
- C
  Charles BarrSep 1, 2025
  Abnormal exhaust gas color in your Kubota Excavators can be attributed to poor fuel quality. Use high-quality fuel. Alternatively, it could be due to too much engine oil; drain the engine oil to the prescribed level.
X
xkimSep 4, 2025
What to do if swing motor and front attachment does not work in Kubota KX057-4 U55-4?
- Z
  zbowmanSep 4, 2025
  If the swing motor and front attachment do not work on your Kubota Excavators, ensure the lock lever is in the "UNLOCK" position.
J
Jeffrey YoungSep 7, 2025
Why does Kubota Excavators have deviation of drive direction?
- C
  Curtis ThompsonSep 7, 2025
  If your Kubota Excavators experiences deviation of drive direction, check for stones blocking the tracks and remove them. Also, verify that the track is not too loose or too tight and adjust accordingly.
F
fmillerSep 12, 2025
What does it mean if system indicator light flashes in Kubota Excavators?
- A
  annettevillanuevaSep 12, 2025
  If the system indicator light flashes in your Kubota Excavators, it indicates a defective fuse in the fuse box. Replace the fuse.

Kubota KX057-4 U55-4 Specifications

General

Brand	Kubota
Model	KX057-4 U55-4
Category	Excavators
Language	English

Summary

SAFE OPERATION

BEFORE OPERATION

Read and understand safety instructions before operating the excavator.

OPERATING THE EXCAVATOR

Instructions for safely mounting, starting, and operating the excavator.

SAFE LOADING AND TRANSPORT OF THE EXCAVATOR

Guidelines for loading, transporting, and securing the excavator on a vehicle.

MAINTENANCE SAFETY

Safety precautions to be taken before and during maintenance work.

INSTRUMENT PANEL AND CONTROL ELEMENTS

INSTRUMENT PANEL AND SWITCHES

Overview of the instrument panel, including LCD display and various switches.

CONTROL PEDALS AND LEVERS

Identification and function of control pedals and levers for machine operation.

CHECKS BEFORE START

DAILY CHECKS

Essential visual checks to be performed on the excavator before starting.

INSTRUMENT PANEL AND CONTROL CHECKS

Detailed checks of indicators, warning lamps, gauges, and system status.

OPERATION OF THE ENGINE

STARTING THE ENGINE

Step-by-step guide for starting the excavator engine safely and correctly.

STARTING THE ENGINE UNDER COLD CONDITIONS

Specific procedures and precautions for starting the engine in cold weather.

CHECK POINTS AFTER STARTING THE ENGINE

Essential checks to perform after the engine has started, before operation.

STOPPING THE ENGINE

Correct procedures for safely stopping the excavator engine.

EXCAVATOR OPERATION

STARTING PROCEDURE

Steps for starting the engine and preparing for operation.

DRIVING AND MANEUVERING

Instructions on driving, turning, and maneuvering the excavator on various terrains.

UP AND DOWNHILL DRIVING

Guidelines for safely driving the excavator uphill and downhill.

OPERATION OF THE DOZER

How to operate the dozer blade for lifting, lowering, and floating.

TWO PATTERN SELECTION SYSTEM (TPSS)

Explanation and usage of the two-pattern control system for levers.

OPERATION OF HYDRAULIC COMPONENTS

Detailed instructions on operating the boom, arm, bucket, and swing functions.

AUXILIARY PORT OPERATION

How to select and use action modes and handle auxiliary ports for attachments.

HYDRAULIC SYSTEM PRESSURE RELEASE

TRANSPORTING THE EXCAVATOR ON A VEHICLE

TRANSPORTING ON A TRUCK

Step-by-step instructions and safety precautions for loading and transporting the excavator.

LIFTING OF THE EXCAVATOR

SAFETY ASPECTS WHEN LIFTING

Critical safety guidelines and precautions to follow when lifting the excavator.

LIFTING PROCEDURE FOR THE EXCAVATOR

Detailed steps for safely lifting the excavator using cables or straps.

MAINTENANCE

MAINTENANCE INTERVALS

Comprehensive table detailing maintenance checks and intervals based on operating hours.

DAILY CHECKS DURING MAINTENANCE

GREASING FRONT ATTACHMENTS

GREASING BUCKET PIN AND BUCKET LINK PIN

GREASING BOOM SWING FULCRUM

REGULAR CHECKS AND MAINTENANCE WORK

BATTERY MAINTENANCE

BATTERY CHARGING

GREASING SWING BEARING TEETH

AIR FILTER ELEMENT INSPECTION AND CLEANING

GREASING SWING BALL BEARING

CHANGING ENGINE OIL AND FILTER

Procedures for changing engine oil and replacing the engine oil filter.

DRIVE UNIT OIL CHANGE

REPLACING FUEL FILTER CARTRIDGE

REPLACING HYDRAULIC FILTERS

Procedures for replacing pilot, return, and suction hydraulic filter elements.

HYDRAULIC OIL CHANGE

Comprehensive guide for changing hydraulic oil and suction filter.

CHANGING RADIATOR COOLANT

OTHER ADJUSTMENTS AND REPLACEMENTS

PURGING OF THE FUEL SYSTEM

ADJUSTMENT OF TRACKS

Instructions for adjusting track tension for both rubber and steel tracks.

CHANGING THE BUCKET

FUSE REPLACEMENT AND CIRCUIT DIAGRAMS

TROUBLESHOOTING

ENGINE TROUBLESHOOTING

Common engine problems and their corresponding countermeasures and solutions.

HYDRAULIC AND DRIVE SYSTEM TROUBLESHOOTING

Troubleshooting for hydraulic system power issues and drive system direction deviations.

OPERATION UNDER COLD WEATHER CONDITIONS

PREPARATION FOR COLD WEATHER OPERATION

Essential preparations for operating the excavator in cold weather conditions.

PROCEDURE AFTER DONE WORK IN COLD WEATHER

LIFTING CAPACITY

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Kubota KX057-4 U55-4 User Manual

Table of Contents

Questions and Answers:

Kubota KX057-4 U55-4 Specifications

Summary

SAFE OPERATION

BEFORE OPERATION

OPERATING THE EXCAVATOR

SAFE LOADING AND TRANSPORT OF THE EXCAVATOR

MAINTENANCE SAFETY

INSTRUMENT PANEL AND CONTROL ELEMENTS

INSTRUMENT PANEL AND SWITCHES

CONTROL PEDALS AND LEVERS

CHECKS BEFORE START

DAILY CHECKS

INSTRUMENT PANEL AND CONTROL CHECKS

OPERATION OF THE ENGINE

STARTING THE ENGINE

STARTING THE ENGINE UNDER COLD CONDITIONS

CHECK POINTS AFTER STARTING THE ENGINE

STOPPING THE ENGINE

EXCAVATOR OPERATION

STARTING PROCEDURE

DRIVING AND MANEUVERING

UP AND DOWNHILL DRIVING

OPERATION OF THE DOZER

TWO PATTERN SELECTION SYSTEM (TPSS)

OPERATION OF HYDRAULIC COMPONENTS

AUXILIARY PORT OPERATION

HYDRAULIC SYSTEM PRESSURE RELEASE

TRANSPORTING THE EXCAVATOR ON A VEHICLE

TRANSPORTING ON A TRUCK

LIFTING OF THE EXCAVATOR

SAFETY ASPECTS WHEN LIFTING

LIFTING PROCEDURE FOR THE EXCAVATOR

MAINTENANCE

MAINTENANCE INTERVALS

DAILY CHECKS DURING MAINTENANCE

GREASING FRONT ATTACHMENTS

GREASING BUCKET PIN AND BUCKET LINK PIN

GREASING BOOM SWING FULCRUM

REGULAR CHECKS AND MAINTENANCE WORK

BATTERY MAINTENANCE

BATTERY CHARGING

GREASING SWING BEARING TEETH

AIR FILTER ELEMENT INSPECTION AND CLEANING

GREASING SWING BALL BEARING

CHANGING ENGINE OIL AND FILTER

DRIVE UNIT OIL CHANGE

REPLACING FUEL FILTER CARTRIDGE

REPLACING HYDRAULIC FILTERS

HYDRAULIC OIL CHANGE

CHANGING RADIATOR COOLANT

OTHER ADJUSTMENTS AND REPLACEMENTS

PURGING OF THE FUEL SYSTEM

ADJUSTMENT OF TRACKS

CHANGING THE BUCKET

FUSE REPLACEMENT AND CIRCUIT DIAGRAMS

TROUBLESHOOTING

ENGINE TROUBLESHOOTING

HYDRAULIC AND DRIVE SYSTEM TROUBLESHOOTING

OPERATION UNDER COLD WEATHER CONDITIONS

PREPARATION FOR COLD WEATHER OPERATION

PROCEDURE AFTER DONE WORK IN COLD WEATHER

LIFTING CAPACITY

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