Komatsu 170-3 Series, Shop Manual, Page: 123 / 454

12-2
170-3 SERIES
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR TROUBLESHOOTING
a
This STANDARD VALUE TABLE does not give the standard values for adjusting the engine output.
a
Do not use the values in this table to change the adjusting the ECVA or injector.
Engine SAA6D170E-3
Model D375A-5
Cate-
gory
Item Measurement conditions Unit
Standard value
for new machine
Service limit
value
Pe
rfor-
m
anc
e
Engine speed
High idling
Low idling
rpm
rpm
2,000±40
750
2,000±40
750
Speed needed to start
0°C (without starting aid)
-20°C (with starting aid)
rpm
rpm
Min. 130
Min. 100
—
—
In
ta
ke,
ex
hau
st
sy
st
em
Intake resistance
Air supply pressure
Exhaust pressure
Exhaust temperature
Whole speed range
At rated output
At rated output
Whole speed range (20°C)
kPa{mmH
2
O}
kPa{mmH
2
O}
kPa{mmH
2
O}
°C
Max. 3
{Max. 300}
Min. 126.7
{Min.950}
Min. 106.7
{Min. 800}
Min 650
7.5
{762}
113.3
{850}
96.0
{720}
700
Exhaust gas color
At sudden acceleration
(low idling
o
high idling)
At rated output
Bosch
index
Max. 4.5
Max. 1.0
Max. 0.5
5.5
2.0
1.5
Valve clearance
Intake valve
Exhaust valve
mm
mm
0.32
0.62
—
—
Engi
ne
pr
ope
r
Compression pressure
Oil temperature: 40 – 60°C
(engine speed:
210 – 250 rpm)
MPa{kg/cm 2 }
Min. 2.9
{Min. 30}
2.1
{21}
Blow-by pressure
At rated output
(water temperature:
Min. 70°C)
kPa{mmH
2
O}
Max. 3.9
{Max. 400}
7.9
{800}
Lu
br
ic
a
tio
n
sy
st
em
Oil pressure
(oil temperature:
Min. 80°C)
At rated output
SAE30 or SAE15W-40
SAE10W
At low idling
SAE30 or SAE15W-40
SAE10W
MPa{kg/cm
2
}
MPa{kg/cm 2 }
MPa{kg/cm
2
}
MPa{kg/cm 2 }
0.39 – 0.54
{4.0 – 5.5}
0.34 – 0.49
{3.5 – 5.0}
Min. 0.12
{Min. 1.2}
Min. 0.10
{Min. 1.0}
0.21
{2.1}
0.18
{1.8}
0.08
{0.8}
0.07
{0.7}
Oil temperature
Whole speed range
(inside oil pan)
°C 90 – 110 120
Oil consumption
Ratio to fuel consumption
at continuous rated output
% Max. 0.5 1.0
C
ool
ing
s
ys
tem
Radiator pressure valve
function
Cracking pressure
(differential pressure)
kPa{kg/cm
2
} — —
Fan speed At rated speed rpm 1,125±35 1,125±35
Fan belt tension
Deflection when pressed
with finger force of approx.
58.8 N {6 kg}
mm
—
Auto-tension
—
Alternator belt tension
Deflection when pressed
with finger force of approx.
98 N {10 kg}
mm 10 – 15
+50
0
+50
0
STANDARD VALUE TABLE FOR TROUBLESHOOTING
(10)
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