Kubota KX027 User manual

GB
KX027-4 - Valid from serial no. 52158
KX030-4 - Valid from serial no. 50740
COMPACT EXCAVATOR
MODEL
KX027-4
KX030-4
OPERATING INSTRUCTIONS
RG268-8135-6 - Original - 01/2019

RG268-8135-6
01/2019
Dear valued customer,
please fill in the form below. Your information will help us to help you.
Please contact your KUBOTA dealer for any additional information or troubleshooting procedures not mentioned
in these operating instructions.
We would also like to point out that the contents of these operating instructions are not part of any previously ex-
isting agreement, commitment or legal relationship nor do they constitute an amendment this. All responsibilities
are taken from the respective sales contract, which contains the complete and exclusively valid contractual war-
ranty, refer to the "Duties, liability and warranty" section (page 13). This documentation neither extends nor re-
stricts the contractual warranty.
KUBOTA Baumaschinen GmbH reserves the right to change the information contained in this document with re-
spect to future technical development without altering the basic characteristics of the excavators described herein
and without amending this document.
Distribution and reproduction of this documentation and disclosure of its content are not allowed unless express
consent is given by the manufacturer. Violators of the above terms are liable for compensation for damages.
Type:
Year of construction:
Serial #:
Shipment date:

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CONTENTS
Abbreviations .......................................................................................................................................... 7
General symbols ..................................................................................................................................... 8
GENERAL INFORMATION .............................................................................................................. 9
Foreword .................................................................................................................................................. 9
EC Declaration of Conformity .............................................................................................................. 10
Date of issue of the operating instructions ........................................................................................ 10
Operating personnel ............................................................................................................................. 10
Location of the operating instructions................................................................................................ 11
Spare parts............................................................................................................................................. 12
SAFETY RULES ............................................................................................................................. 13
Basic safety instructions...................................................................................................................... 13
Duties, liability and warranty................................................................................................................ 13
Safety symbols ...................................................................................................................................... 14
Approved use ........................................................................................................................................ 15
Unapproved use .................................................................................................................................... 15
Special duties of the owner.................................................................................................................. 16
Noise emission and vibration .............................................................................................................. 17
Danger, warning and safety labels on the machine........................................................................... 17
Safety devices ....................................................................................................................................... 26
Locking the controls ........................................................................................................................... 26
Engine stop knob ............................................................................................................................... 26
Protective structure canopy and cab .................................................................................................. 27
Emergency hammer ........................................................................................................................... 28
Hazards coming from the hydraulic system....................................................................................... 28
Fire protection ....................................................................................................................................... 29
RECOVERY, LOADING AND TRANSPORT ................................................................................. 31
Safety rules for recovery ...................................................................................................................... 31
Safety rules while loading with a crane .............................................................................................. 31
Safety rules for transport ..................................................................................................................... 32
Recovery ................................................................................................................................................ 33
Hoisting the excavator with a crane .................................................................................................... 33
Transport on a flat bed trailer .............................................................................................................. 35
DESCRIPTION OF THE EXCAVATOR .......................................................................................... 37
Dimensions ............................................................................................................................................ 37
Specifications ........................................................................................................................................ 39
Identification of the excavator ............................................................................................................. 44
Serial # of the machine ...................................................................................................................... 44
Identification of the engine ................................................................................................................. 44
Standard equipment.............................................................................................................................. 45
ASSEMBLY AND FUNCTIONS...................................................................................................... 47
Component overview ............................................................................................................................ 47
Operator's place .................................................................................................................................... 48
Left control console ............................................................................................................................ 48
Drive levers and control pedals .......................................................................................................... 49
Right control console.......................................................................................................................... 50
Display and control unit...................................................................................................................... 51
Other equipment at the operator's place ............................................................................................ 53
Interior lighting (cab version) .............................................................................................................. 53
Fuse box ............................................................................................................................................ 53
Tool compartment .............................................................................................................................. 54
Cup holder.......................................................................................................................................... 54
12-V socket ........................................................................................................................................ 54

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Other equipment to be found on the machine .................................................................................... 55
Main battery........................................................................................................................................ 55
Battery isolator.................................................................................................................................... 55
Return change valve for direct return flow.......................................................................................... 55
Tank filler neck and fill level monitor................................................................................................... 56
Main fuses .......................................................................................................................................... 56
Rear view mirror ................................................................................................................................. 56
Heating and ventilation (cab version) ................................................................................................. 57
Hydraulic oil tank ................................................................................................................................ 58
Coolant radiator and hydraulic oil radiator.......................................................................................... 58
Engine compartment ............................................................................................................................. 59
OPERATION....................................................................................................................................61
Safety rules for operation ..................................................................................................................... 61
Safety for children............................................................................................................................... 62
Guiding the operator........................................................................................................................... 62
Working in the vicinity of overhead power lines.................................................................................. 63
Working in the vicinity of underground power lines ............................................................................ 63
Initial operation...................................................................................................................................... 63
Getting on the excavator .................................................................................................................... 64
Explanation of the display indications................................................................................................. 64
Setting the clock ................................................................................................................................. 65
Running in the excavator.................................................................................................................... 66
Special maintenance instructions ....................................................................................................... 66
Pre-operational services....................................................................................................................... 66
Walk-around inspection ...................................................................................................................... 66
Dust valve - cleaning .......................................................................................................................... 67
Engine oil level - check....................................................................................................................... 67
Coolant level - check .......................................................................................................................... 67
Coolant radiator and oil cooler - check ............................................................................................... 68
V-belt - check...................................................................................................................................... 68
Exhaust system leakage - check ........................................................................................................ 69
Hydraulic oil level - check ................................................................................................................... 69
Water separator - check ..................................................................................................................... 69
Bucket bolt and bucket linkage bolt - grease...................................................................................... 70
Swing bracket - grease....................................................................................................................... 70
Other greasing points - grease ........................................................................................................... 71
Fuel level - check................................................................................................................................ 72
Washer system liquid level (cab version) - check............................................................................... 72
Electrical instrumentation - check....................................................................................................... 72
Setting up the workplace ...................................................................................................................... 73
Opening and closing the cab door (cab version) ................................................................................ 73
Opening and closing the windows (cab version) ................................................................................ 74
Adjusting the operator's seat .............................................................................................................. 75
Rear view mirrors adjustment............................................................................................................. 76
Seat belt ............................................................................................................................................. 76
Operating the excavator ....................................................................................................................... 77
Safety instructions for starting the engine .......................................................................................... 77
Starting the engine ............................................................................................................................. 77
Stopping the engine............................................................................................................................ 79
Observation of the displays after starting and during operation ......................................................... 79
Driving with the excavator .................................................................................................................. 82
Driving uphill and downhill .................................................................................................................. 86
Stopping on gradients......................................................................................................................... 86
Notes for rubber crawler operation ..................................................................................................... 87
Operating the controls during excavation work .................................................................................. 88
Note on using wider and deeper buckets......................................................................................... 88
Operating the dozer ......................................................................................................................... 89
Overview of control lever functions .................................................................................................. 89

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Operating the boom ......................................................................................................................... 90
Operating the arm............................................................................................................................ 91
Operating the bucket ....................................................................................................................... 92
Swivelling the swivel frame.............................................................................................................. 93
Swinging the boom .......................................................................................................................... 93
Operating the auxiliary port.............................................................................................................. 94
One way hold operation (KX027-4 HI, KX030-4 HI) ........................................................................ 97
Operating modes (KX027-4 HI, KX030-4 HI)................................................................................... 98
Setting the flow rate (KX027-4 HI, KX030-4 HI) .............................................................................. 99
Return change valve for direct return flow..................................................................................... 103
Relieving pressure from the hydraulic system ............................................................................... 104
Releasing pressure from the auxiliary ports (KX027-4 HI, KX030-4 HI)........................................ 105
Placing out of operation ..................................................................................................................... 107
Operating other equipment at the operator's place ......................................................................... 108
Operating the heating system (cab version) .................................................................................... 108
Operating the wiper/washer system (cab version) ........................................................................... 110
Operating the interior light (cab version) .......................................................................................... 111
Operating the rotary beacon (accessories) ...................................................................................... 111
Operating the 12 V plug ................................................................................................................... 111
Operating the working lights............................................................................................................. 112
Operating the battery isolator ........................................................................................................... 112
Cold weather operation ...................................................................................................................... 113
Necessary preparations prior to the winter season .......................................................................... 113
Operation during the winter season ................................................................................................. 113
Jump-starting the excavator .............................................................................................................. 114
Operating in emergency situations ................................................................................................... 115
Engine stop knob ............................................................................................................................. 115
Manual lowering of the front attachments ........................................................................................1
15
Maintenance......................................................................................................................................... 116
Filling up the washer system ............................................................................................................ 116
Checking the antifreeze strength of the coolant ............................................................................... 116
Refilling the coolant.......................................................................................................................... 117
Refuelling the excavator................................................................................................................... 118
Fill level monitor when refuelling ...................................................................................................... 118
Bleeding the fuel system .................................................................................................................. 119
Replacing the fuses.......................................................................................................................... 119
Fuse layout of the fuse box............................................................................................................ 120
Main fuses ..................................................................................................................................... 121
Cleaning the excavator .................................................................................................................... 121
Replacing the bucket .......................................................................................................................... 122
Anti-theft system ................................................................................................................................. 122
Black (individual) key ....................................................................................................................... 123
Red key (for registering)................................................................................................................... 123
The key system ................................................................................................................................ 123
Registering a black key for the machine .......................................................................................... 124
TROUBLESHOOTING.................................................................................................................. 127
Safety rules for troubleshooting........................................................................................................ 127
Troubleshooting: Before operation ................................................................................................... 127
Troubleshooting: Operation............................................................................................................... 128
Troubleshooting: Display indications ............................................................................................... 130
MAINTENANCE............................................................................................................................ 135
Safety rules for maintenance ............................................................................................................. 135
Personnel requirements ..................................................................................................................... 136
Repair work on the machine .............................................................................................................. 136
Maintenance intervals......................................................................................................................... 136
Maintenance interval display ............................................................................................................ 136
Operator maintenance chart ............................................................................................................ 138

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Skilled personnel maintenance chart................................................................................................ 140
Recommended lubricants................................................................................................................... 142
Make the maintenance points accessible ......................................................................................... 144
Opening/closing the engine compartment cover .............................................................................. 144
Opening/closing the side cover ........................................................................................................ 144
Opening and closing the left service cover....................................................................................... 145
Opening/closing the right ventilation grille ........................................................................................ 145
Maintenance work for the operator.................................................................................................... 146
Every 50 hours of operation ............................................................................................................... 146
Fuel tank - drain................................................................................................................................ 146
Battery service.................................................................................................................................. 147
Battery - check ............................................................................................................................... 147
Battery - load.................................................................................................................................. 147
Battery - change............................................................................................................................. 148
Swivel gear - grease......................................................................................................................... 149
Crawler tension - check/adjust ......................................................................................................... 149
Crawler tension - check ................................................................................................................. 150
Crawler tension - adjust ................................................................................................................. 151
Water separator - cleaning ............................................................................................................... 151
Every 200 hours of operation ............................................................................................................. 153
Swivel bearing - grease .................................................................................................................... 153
Fresh air filter - check/clean ............................................................................................................. 153
Air filter element - check/clean ......................................................................................................... 154
Coolant hoses and hose clamps - check.......................................................................................... 155
Fuel lines and air intake hoses - check ............................................................................................ 155
Servicing by skilled personnel........................................................................................................... 156
Every 250 hours of operation ............................................................................................................. 156
V-belt - adjust ................................................................................................................................... 156
Pilot valve - grease ........................................................................................................................... 156
Every 500 hours of operation ............................................................................................................. 157
Engine oil and oil filter - change ....................................................................................................... 157
Engine oil - drain ............................................................................................................................ 157
Engine oil filter - change ................................................................................................................ 157
Engine oil - fill................................................................................................................................. 158
Drive unit oil - change....................................................................................................................... 158
Fuel filter cartridge - change............................................................................................................. 159
Return filter - change ........................................................................................................................ 160
Every 1000 hours of operation ........................................................................................................... 161
Hydraulic oil - fill/change................................................................................................................... 161
Hydraulic oil - drain ........................................................................................................................ 161
Hydraulic oil - fill............................................................................................................................. 162
Suction filter - change....................................................................................................................... 163
Heating pipes and hoses - check ..................................................................................................... 163
In-line filter - change ......................................................................................................................... 164
Fresh air filter - change..................................................................................................................... 164
Air filter element - change................................................................................................................. 165
Pilot circuit filter - change ................................................................................................................. 165
Every 2 years ....................................................................................................................................... 167
Coolant - change .............................................................................................................................. 167
Bolted joints - check ........................................................................................................................... 169
Tightening torque for screws ............................................................................................................ 169
Tightening torque for hose clamps ................................................................................................... 169
Tightening torque for hydraulic hoses .............................................................................................. 170
Tightening torque for hydraulic pipes ............................................................................................... 170
Tightening torque for hydraulic adapters .......................................................................................... 170

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SAFETY INSPECTION ................................................................................................................. 171
TAKING OUT OF SERVICE AND STORAGE.............................................................................. 173
Safety rules for taking out of service and storage........................................................................... 173
Storage conditions.............................................................................................................................. 173
Measures before taking out of service.............................................................................................. 173
Measures during taking out of service.............................................................................................. 173
Start-up after taking out of service.................................................................................................... 174
LIFTING CAPACITY OF THE EXCAVATOR ............................................................................... 175
Constructive calculation of lifting capacity ...................................................................................... 175
Lifting attachment ............................................................................................................................... 176
Load suspension device..................................................................................................................... 177
Max. lifting capacity when rotating up to 360° ................................................................................. 179
ACCESSORIES ............................................................................................................................ 189
KUBOTA rotary beacon ...................................................................................................................... 189
KUBOTA pipe safety valve ................................................................................................................. 189
KUBOTA overload warning system................................................................................................... 190
KUBOTA quick coupling systems and attachments........................................................................ 190
KUBOTA bucket accessories............................................................................................................. 190

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Abbreviations
1/min revolutions per minute
%percent
°degrees
°C Degrees Celsius
AAmpere
acc. according
API American Petroleum Institute
approx. approximately
ASTM American Society for Testing and Materials
bar Bar
CECE Committee for European Construction
Equipment
CO2carbon dioxide
dB decibel
DIN Deutsches Institut für Normung 
(German Institute for Standards)
e.g. for example
EMC electromagnetic compatibility
EN Europäische Norm (European standard)
GL Ground level
hHour
incl. including
ISO International Organisation for
Standardisation
kg kilogramme
km/h kilometre per hour
kN kilonewton
kV kilovolt
kW kilowatt
llitre
l/min litres per minute
LpA noise level operator's place
LwA measured sound power level
mmetre
m/s² metre per square second
m³ cubic metre
max. maximum
MIL Military Standards
mm millimetre
MPa Megapascal
NNewton
OPG Operator Protective Guard
resp. respectively
RMS Root Mean Square
ROPS Roll-Over Protective Structure 
(Roll-over protection)
ssecond
SAE Society of Automotive Engineers
tton
TOPS Tipping Over Protective Structure
VVolt

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General symbols
Warning light
Fuel indicator
Engine oil indicator
Charge indicator
Glow indicator
Hydraulic oil
Travel speed
Low speed
Forward travel
Backward travel
Raise boom
Lower boom
Arm dump
Arm crowd
Bucket crowd
Bucket dump
Indicator coolant temperature
Service interval indicator
Set clock indicator
Swivel boom (left)
Swivel boom (right)
Dozer up
Dozer down
Lever direction
Control lever direction
Rotary beacon
Display selector switch
Auxiliary port indicator
Working lights
Horn
Bolted
Released
Fan
Menu button
Insert key
Pull out Key
Indirect return flow
Direct return flow