Komatsu ecot3 PC300-8, Shop Manual

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40 Troubleshooting
8
PC300, 350-8
SEN02628-04
Possible problems and troubleshooting No.
No. Phenomena supposed to show troubles
Troubleshooting
Display of
code
E-mode H-mode S-mode
Phenomena related to action code/failure code
1 An action code is displayed on machine monitor.
According
to dis-
played code
2
When abnormality record is checked, failure code is dis-
played in electrical system abnormality record
3
When abnormality record is checked, failure code is dis-
played in mechanical system abnormality record
Phenomena related to engine
4 Starting performance is poor (it always starts up slowly) S-1
5
Engine does
notstart
Engine does not rotate E-1 S-2 a)
6
Engine rotates, but exhaust gas does not
come out
S-2 b)
7
Engine emits exhaust gas, but it does not
start
S-2 c)
8
Engine does not pick up smoothly (follow-up performance
is poor)
S-3
9 Engine stops during operations H-2 S-4
10 Engine rotation is unstable (it hunts). S-5
11 Engine lacks output or power H-1 S-6
12 Exhaust smoke is black (incomplete combustion) S-7
13 Oil consumption is excessive or exhaust smoke is blue S-8
14 Oil becomes contaminated quickly S-9
15 Fuel consumption is excessive S-10
16
Oil is in coolant, coolant spurts back or coolant level goes
down
S-11
17 Oil pressure drops S-12
18 Oil level rises (Entry of coolant/fuel) S-13
19 Coolant temperature becomes too high (overheating) S-14
20 Abnormal noiseis made S-15
21 Vibration is excessive S-16
22 Auto-decelerator does not operate E-2 H-5
23 Automatic warm-up system does not operate E-3
24 Preheater does not work E-4
Phenomena related to work equipment, swing, and travel
25
Speed or power of whole work equipment, swing, and
travel is low
H-1 S-6
26 Engine speed lowers extremely or engine stalls H-2 S-4
27 Work equipment,swing, and travel systems do not work E-5 H-3
28 Abnormal soundcomes out from around hydraulic pump H-4
29 Fine controlperformance or response is low H-6
Phenomena related to work equipment
30 Speed or power of boom is low E-18, 19 H-7
31 Speed or power of arm is low E-20, 21 H-8
32 Speed or power of bucket is low E-22, 23 H-9
33 Work equipment does not move singly H-10
34 Hydraulic driftof work equipment is large H-11
35 Time lag of worke quipment is large H-12
36
When part of work equipment is relieved singly, other parts
of work equipment movee
H-13