Komatsu PC20R-8 Shop Manual page 118

NORMAL OR STANDARD TECHNICAL DATA
. FOR THE ENGINE
Check item Test condition
High idling
Engine speed Low idling
Rated speed
At sudden acceleration
Exhaust gas
colour
At high idling speed
Intake valve (20ëC)
Valve clearance
Exhaust valve (20ëC)
Compression
Oil temperature 40-60ëC
pressure
(Engine speed)
(SAE30 oil)
Water temperature in
Blow-by
operating range
pressure
(SAE30 oil)
At high idling speed
(Water temperature in operating range)
At high idling speed (SAE30)
Engine oil
pressure
At low idling speed (SAE30)
At low idling speed (SAE10)
Engine oil
Whole speed range
temperature
Fuel injection
Before top dead center (BTDC)
timing
Deflection when
Fan-belt tension pressed with finger
force of approx. 6 Kg
20-2
Machine model
Engine
Standard
Unit
value
rpm 2780
rpm 950
rpm 2600
Bosch 3.5
Index Max. 0.5
mm 0.20
mm 0.20
2
kg/cm 32w1
rpm (250)
mm H O Ð
2
±0.5
2 3.7
kg/cm
+1
2
kg/cm Min. 1.0
2
kg/cm Ð
ëC Max. 120
degrees 14w1
mm 10 ± 15
PC20R-8
3D78AE-3FA
Permissible
value
2755 ± 2805
925 ± 975
Ð
5.0
Max. 1.0
Ð
Ð
26w1
(250)
Ð
Ð
Ð
Ð
Max. 120
14w1
Ð
PC20R-8 PC27R-8