Komatsu ecot3 WA200-6 Shop Manual page 12

Table of Contents

SEN03871-05

E-18 Backup lamp does not light or it keeps lighting up ............................................................................... 78

E-19 Backup alarm does not sound or it keeps sounding............................................................................. 81

E-20 Horn does not sound or it keeps sounding ........................................................................................... 84

E-21 Alarm buzzer does not sound or it keeps sounding.............................................................................. 86

E-22 Air conditioner does not operate or stop............................................................................................... 89

E-23 The KOMTRAX system does not work properly................................................................................... 92

500 Troubleshooting of hydraulic and mechanical system (H-mode)

Method of using troubleshooting chart ..........................................................................................................

Failure code and cause table ........................................................................................................................

H-1 The machine does not start....................................................................................................................

H-2 The travel speed is slow.........................................................................................................................

H-3 The traction force is weak ...................................................................................................................... 10

H-4 Engine stalls when traveling or engine speed drops excessively........................................................... 11

H-5 The gear is not shifted............................................................................................................................ 12

H-6 The steering wheel does not turn ........................................................................................................... 13

H-7 The steering wheel is heavy................................................................................................................... 14

H-8 Steering wheel shakes or jerks............................................................................................................... 15

H-9 Machine deviates naturally to one side when traveling .......................................................................... 15

H-10 The brake does not work or does not work well ................................................................................... 16

H-11 The brake is not released or is dragged ............................................................................................... 17

H-12 The lift arm does not rise or lower ........................................................................................................ 18

H-13 The lift arm moves slowly or the lift arm rising force is insufficient ....................................................... 19

H-14 When rising, the lift arm comes to move slowly at specific height........................................................ 20

H-15 The lift arm cylinder cannot hold down the bucket (The bucket rises in the air)................................... 20

H-16 Hydraulic drifts of the lift arm occur often ............................................................................................. 20

H-17 The lift arm wobbles during operation .................................................................................................. 20

H-18 When the control lever is switched from "HOLD" to "RAISE," the lift arm falls temporarily .................. 21

H-19 The bucket does not tilt back................................................................................................................ 22

H-20 The bucket moves slowly or the tilting-back force is insufficient .......................................................... 23

H-21 The bucket comes to operate slowly in the midst of tilting-back .......................................................... 24

H-22 The bucket cylinder cannot hold down the bucket ............................................................................... 24

H-23 Hydraulic drifts of the bucket occur often ............................................................................................. 24

H-24 The bucket wobbles during travel with load (The work equipment valve is set to "HOLD") ................. 24

H-25 When the control lever is switched from "HOLD" to "TILT," the bucket falls temporarily ...................... 25

H-26 The control levers of the lift arm and bucket do not move smoothly and heavy................................... 25

H-27 The ECSS does not operate and machine pitches and bounces......................................................... 26

H-28 Fan revolution is abnormal (Fan sound/vibration is abnormally large or engine overheats) ................ 27

600 Troubleshooting of engine (S-mode)

Method of using troubleshooting charts ........................................................................................................

S-1 Starting performance is poor ..................................................................................................................

S-2 Engine does not start..............................................................................................................................

S-3 Engine does not pick up smoothly.......................................................................................................... 10

S-4 Engine stops during operations .............................................................................................................. 11

S-5 Engine does not rotate smoothly ............................................................................................................ 12

S-6 Engine lacks output (or lacks power)...................................................................................................... 13

S-7 Exhaust smoke is black (incomplete combustion).................................................................................. 14

S-8 Oil consumption is excessive (or exhaust smoke is blue) ...................................................................... 15

S-9 Oil becomes contaminated quickly ......................................................................................................... 16

S-10 Fuel consumption is excessive............................................................................................................. 17

S-11 Oil is in coolant (or coolant spurts back or coolant level goes down) ................................................... 18

S-12 Oil pressure drops ................................................................................................................................ 19

S-13 Oil level rises (Entry of coolant or fuel)................................................................................................. 20

S-14 Coolant temperature becomes too high (overheating) ......................................................................... 21

S-15 Abnormal noise is made ....................................................................................................................... 22

S-16 Vibration is excessive ........................................................................................................................... 23

00-100

100 Index

Table of contents

SEN03898-01

SEN03899-01

WA200, 200PZ-6

Table of Contents