Komatsu ecot3 PC300-8, Shop Manual

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00 Index and foreword SEN01985-15
PC300, 350-8
9
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
H-13 Other work equipment moves when relieving single circuit................................................ 18
H-14 Power max. switch does not operate ................................................................................. 19
H-15 In compound operation, work equipment with larger load moves slowly ........................... 19
H-16 In swing + boom RAISE operation, boom moves slowly .................................................... 20
H-17 In swing + travel operation, travel speed drops sharply ..................................................... 20
H-18 Machine swerves in travel .................................................................................................. 21
H-19 Machine travels slowly ....................................................................................................... 22
H-20 Machine cannot be easily steered or lacks power.............................................................. 23
H-21 Travel speed does not shift, or it is too slow or fast............................................................ 24
H-22 Track shoe does not turn (on one side only) ...................................................................... 25
H-23 Machine does not swing..................................................................................................... 26
H-24 Swing acceleration is poor, or swing speed is slow............................................................ 28
H-25 Excessive overrun when stopping swing............................................................................ 30
H-26 There is big shock when stopping swing............................................................................ 31
H-27 Large sound is made when upper structure stops swinging. ............................................. 31
H-28 Swing hydraulic drift is too big............................................................................................ 32
Troubleshooting of engine (S-mode) SEN02634-02
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 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
50 Disassembly and assembly
General information on disassembly and assembly SEN02635-02
How to read this manual ............................................................................................................. 2
Coating materials list................................................................................................................... 4
Special tool list ............................................................................................................................ 7
Sketches of special tools............................................................................................................. 10
Engine and cooling system SEN02636-03
Removal and installation of fuel supply pump assembly............................................................. 2
Removal and installation of engine front seal ............................................................................. 5
Removal and installation of engine rear seal .............................................................................. 8
Removal and installation of cylinder head assembly .................................................................. 13
Removal and installation of radiator assembly............................................................................ 26
Removal and installation of hydraulic oil cooler assembly .......................................................... 28