Komatsu ecot3 PC300LC-8 Shop Manual page 807

HYDRAULIC EXCAVATOR
PC300-8
PC300LC-8
PC350-8
PC350LC-8
Machine model
PC300-8
PC300LC-8
PC350-8
PC350LC-8
40 Troubleshooting
Troubleshooting of hydraulic and
mechanical system (H-mode)
System chart for hydraulic and mechanical system ........................................................................................ 4
Information contained in troubleshooting table ............................................................................................... 6
H-1 All work equipment lack power, or travel and swing speeds are slow...................................................... 8
H-2 Engine speed sharply drops or engine stalls.......................................................................................... 10
H-3 No work equipment, swing or travel move ..............................................................................................11
H-4 Abnormal noise is heard from around hydraulic pump............................................................................11
H-5 Auto-decelerator does not work ............................................................................................................. 12
H-6 Fine control mode does not function or responds slow.......................................................................... 12
H-7 Boom moves slowly or lacks power ....................................................................................................... 13
H-8 Arm moves slowly or lacks power .......................................................................................................... 14
H-9 Bucket moves slowly or lacks power...................................................................................................... 15
H-10 Work equipment does not move in its single operation........................................................................ 15
H-11 Work equipment has a bit too fast hydraulic drift.................................................................................. 16
H-12 Work equipment has big time lag ......................................................................................................... 18
PC300, 350-8
1SHOP MANUAL
Serial number
60001 and up
60001 and up
60001 and up
60001 and up
SEN02633-03
1
1