MEASUREMENT OF THE COMPRESSION PRESSURE
20-27
TESTING AND ADJUSTMENTS
MEASUREMENT OF THE COMPRESSION PRESSURE
.
While measuring the compression, take care not
to get entangled in the cooling fan, the alternator
belt, or in other rotating parts.
.
Check all cylinders.
H
Test conditions:
.
Engine: at working temperature.
.
Hydraulic oil: 45 ± 55 ëC.
.
Battery: fully charged.
.
Valve clearance: adjusted
(See «ADJUSTMENT OF VALVE CLEARANCE»).
.
Air filter functioning properly.
1 - Remove the clamp (1) and disconnect the high-pres-
sure tube (2).
2 - Remove the nozzle holder (3) of the cylinder to be
checked.
3 - Disconnect the connector (4) of the engine-stopping
solenoid and close the fuel cock (5).
4 - Turn the engine over a few times, using the starting
motor.
5 - Mount the adapter
B2
and connect the test pressure
gauge
B1
.
H
Check that the seal is mounted in the adapter,
and that it is undamaged.
6 - Turn the engine using the starting motor and read the
compression value.
H
Read the compression value when the pressure
gauge has stabilised.
H
While reading the compression, also check the
engine rpm using the tachometer
C1
or
C2
. If
the speed does not correspond with the control
value, check it against the diagram.
H
Compression value:
Normal: PC20R-8: 32
w
1 kg/cm
2
at 250 rpm
PC27R-8: 31
w
1 kg/cm
2
at 250 rpm
Minimum permissible:
PC20R-8: 26
w
1 kg/cm
2
at 250 rpm
PC27R-8: 25
w
1 kg/cm
2
at 250 rpm
H
Maximum difference between the cylinders:
2 ± 3 kg/cm
2
7 - After the reading, re-assemble the nozzle holder (3),
and reconnect the high- pressure tube (2) and the
connector (4).
Nut that secures the nozzle: 7.84
w
0.98 Nm
High-pressure coupling: 31.85
w
2.45 Nm
PC20R-8 PC27R-8
RKPA2150
3
2
1
RKPA2160
5
4
B
1
C
1
B
2
RKP06370
RKP06521
35
40
30
25
20
200
250
300
350
400
Engine speed (giri/min)
Compression pressure (kg/cm
2
)
PC27R
PC20R
Содержание F30791
Страница 1: ......
Страница 2: ...40 28 PC15R 8...
Страница 4: ...00 2 PC20R 8 PC27R 8...
Страница 17: ...GRUPPO 10...
Страница 18: ...40 28 PC15R 8...
Страница 32: ...10 14 PC20R 8 PC27R 8 PAGE INTENTIONALLY LEFT BLANK...
Страница 34: ...10 16 PC20R 8 PC27R 8 PAGE INTENTIONALLY LEFT BLANK...
Страница 36: ...10 18 PC20R 8 PC27R 8 PAGE INTENTIONALLY LEFT BLANK...
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Страница 98: ...10 80 PC20R 8 PC27R 8 PAGE INTENTIONALLY LEFT BLANK...
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Страница 110: ...10 92 PC20R 8 PC27R 8 PAGE INTENTIONALLY LEFT BLANK...
Страница 112: ...10 94 PC20R 8 PC27R 8 PAGE INTENTIONALLY LEFT BLANK...
Страница 114: ...10 96 PC20R 8 PC27R 8...
Страница 115: ...GRUPPO 20...
Страница 116: ...40 28 PC15R 8...
Страница 131: ...PC27R 8 Standard value Permissible value Max 20 Max 30 2 Max 5 2 Max 5 2 Max 5 FOR THE MACHINE 20 15 PC20R 8 PC27R 8...
Страница 180: ...H 20 64 TESTING AND ADJUSTMENTS PC20R 8 PC27R 8...
Страница 181: ...GRUPPO 30...
Страница 182: ...40 28 PC15R 8...
Страница 262: ...30 80 REMOVAL AND INSTALLATION PC20R 8 PC27R 8...
Страница 263: ...GRUPPO 40...
Страница 264: ...40 28 PC15R 8...
Страница 279: ...40 15 PC20R 8 PC27R 8 RKP01661 Sezione A A 44 1w4 9 Nm 4 5w0 5 kgm 44 1w4 9 Nm 4 5w0 5 kgm Section A A...
Страница 287: ...40 23 PC20R 8 PC27R 8 PAGE INTENTIONALLY LEFT BLANK...
Страница 298: ...40 34 PC20R 8 PC27R 8...