00 Index and foreword UEN00093-01 E-25 Machine monitor cannot be set in service mode............................................................. 56 E-26 Monitoring function does not display lever control signal normally ................................. 57 E-27 KOMTRAX system does not operate normally ............................................................... 66 Troubleshooting of hydraulic and mechanical system (H-mode) UEN00245-00 System diagram of hydraulic and mechanical system............................................................. 4 Information in troubleshooting table ........................................................................................
6 H-1 Speed or power of whole work equipment, swing, and travel is low................................. 7 H-2 Engine speed lowers extremely or engine stalls............................................................... 9 H-3 Work equipment, swing, and travel systems do not work................................................. 10 H-4 Abnormal sound comes out from around hydraulic pump ................................................ 10 H-5 Auto-decelerator does not operate ................................................................................... 11 H-6 Fine control performance or response is low....................................................................
11 H-7 Speed or power of boom is low......................................................................................... 12 H-8 Speed or power of arm is low ........................................................................................... 13 H-9 Speed or power of bucket is low....................................................................................... 14 H-10 Work equipment does not move singly........................................................................... 14 H-11 Hydraulic drift of work equipment is large .......................................................................
15 H-12 Time lag of work equipment is large ............................................................................... 17 H-13 When part of work equipment is relieved singly, other parts of work equipment move .. 17 H-14 Power maximizing function does not work...................................................................... 18 H-15 In compound operation of work equipment, speed of part loaded more is low............... 18 H-16 When machine swings and raises boom simultaneously, boom rising speed is low ...... 19 H-17 When machine swings and travels simultaneously, travel speed lowers largely ............
19 H-18 Machine deviates during travel....................................................................................... 20 H-19 Travel speed is low ......................................................................................................... 21 H-20 Machine is not steered well or steering power is low...................................................... 22 H-21 Travel speed does not change or travel speed is low/high............................................. 23 H-22 Travel system does not move (only one side) ................................................................
24 H-23 Upper structure does not swing...................................................................................... 25 H-24 Swing acceleration or swing speed is low ...................................................................... 27 H-25 Upper structure overruns remarkably when it stops swinging ........................................ 28 H-26 Large shock is made when upper structure stops swinging ........................................... 29 H-27 Large sound is made when upper structure stops swinging........................................... 29 H-28 Hydraulic drift of swing is large .......................................................................................
30 H-29 Attachment circuit is not changed................................................................................... 31 H-30 Oil flow in attachment circuit cannot be controlled.......................................................... 31 Troubleshooting of engine (S-mode) UEN00246-00 Method of using troubleshooting chart .................................................................................... 3 S-1 Starting performance is poor............................................................................................. 6 S-2 Engine does not start ........................................................................................................
7 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 lack 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/fuel) ............................................................................... 20 S-14 Coolant temperature becomes too high (overheating).................................................... 21 S-15 Abnormal noise is made ................................................................................................. 22 S-16 Vibration is excessive ..................................................................................................... 23 PC210, 230, 240-8 9