Komatsu 95-2 Series User Manual

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95-2 SERIES
TROUBLESHOOTING S-1
S-1 Starting performance is poor (starting always takes time)
fl Check that the monitor panel does not display any
abnormality in the governor control system.
General causes why exhaust smoke comes out but
engine takes time to start
• Defective electrical system
• Insufficient supply of fuel
• Insufficient intake of air
• Improper selection of fuel
(At ambient temperature of 10˚C or below, use
ASTM D975 No. 1)
fl Battery charging rate
100% 90% 80% 75% 70%
20°C 1.28 1.26 1.24 1.23 1.22
0°C 1.29 1.27 1.25 1.24 1.23
–10°C 1.30 1.28 1.26 1.25 1.24
Charging rate
Ambient tem-
perature
• The specific gravity should exceed the value
for the charging rate of 70% in the above table.
• In cold areas the specific gravity must ex-
ceed the value for the charging rate of 75%
in the above table.
Confirm recent repair history
Degree of use of machine
Ease of starting
Indicator lamp does not light up
Engine oil must be added more frequently
Replacement of filters has not been carried out according to Operation Manual
Non-specified fuel is being used
Dust indicator is red
Battery charge lamp is ON
Starting motor cranks engine slowly
When exhaust manifold is touched immediately after starting
engine, temperature of some cylinders is low
Engine does not pick up smoothly, and combustion is irregular
Blow-by gas is excessive
Match marks on fuel injection pump are out of alignment
Mud is stuck to fuel tank cap
When engine is cranked with starting motor,
1) Little fuel comes out even when fuel injection pipe
sleeve nut is loosened
2) Little fuel comes out even when fuel filter air bleed
plug is loosened
Leakage from fuel piping
There is hunting from engine (rotation is irregular)
Worn piston ring, cylinder
Defective contact of valve, valve seat
Clogged air cleaner element
Clogged fuel filter, strainer
Clogged feed pump strainer
Electrical intake air heater
Glow plug
Defective regulator
Defective alternator
Defective or deteriorated battery
Defective fuel injection nozzle
Defective fuel injection timing
Defective fuel injection pump (rack, plunger stuck)
Leakage, clogging, air in fuel piping
Clogged air breather hole in fuel tank cap
Auxiliary
starting system
Questions
When compression pressure is measured, it is found to be low
When air cleaner element is inspected directly, it is found to be clogged
When fuel filter, strainer are inspected directly, they are found to be clogged
When feed pump strainer is inspected directly, it is found to be clogged
Glow plug mount does not become warm
Is voltage 26 – 30V between alternator terminal
B and terminal E with engine at low idling?
Either specific gravity of electrolyte or voltage of battery is low
Speed does not change when operation of certain cylinders is stopped
When check is made using delivery method, injection timing
is found to be incorrect
When control rack is pushed, it is found to be heavy or does
not return (when blind cover at rear of pump is removed, it
can be seen that plunger control sleeve does not move)
When fuel cap is inspected directly, it is found to be clogged
Troubleshooting Check items
Causes
Operated for long period
Gradually became worse
Starts when warm
Yes
No
Remedy
Replace Correct Clean Clean Clean Replace Replace Replace Replace Replace Replace Adjust Replace Correct Clean
Legend
: Possible causes (judging from Questions and check items)
: Most probable causes (judging from Questions and Check items)
: Possible causes due to length of use (used for a long period)
: Items to confirm the cause
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Komatsu 95-2 Series Specifications

General

Brand	Komatsu
Model	95-2 Series
Category	Engine
Language	English