16.0
00497R0990 - 15-07-2000
D IE S E L
5
5
5
5
5
24
23
21
22
The operation is carried out by applying a calibrated pressure
to the convex side in the middle of the connecting rod stem set
on surface plates (fig. 21).
C
C
C
C
C
A
A
A
A
A
B
B
B
B
B
9.8 Crankshaft
It is advisable to check the condition of the crankshaft whenever
the engine is demounted and particularly when cylinders and
pistons must be replaced following wear due to dust having
been intaken.
Thoroughly clean inside the oil ducts using a shaped metal
point.
If there are heavily caked incrustations, immerse the crankshaft
into a bath of petroleum or gasoline before proceeding with the
scraping operation (fig. 22).
When the crankshaft is perfectly clean, check with a micrometer
to ascertain wear and main journal ovality in the two
perpendicular positions (fig. 23).
Grind the shaft if the wear exceeds the values in the table by
0.08 mm
0.08 mm
0.08 mm
0.08 mm
0.08 mm or more.
NOTE: crankshaft grinding operations of more than 0.25
NOTE: crankshaft grinding operations of more than 0.25
NOTE: crankshaft grinding operations of more than 0.25
NOTE: crankshaft grinding operations of more than 0.25
NOTE: crankshaft grinding operations of more than 0.25
mm should not be carried out.
mm should not be carried out.
mm should not be carried out.
mm should not be carried out.
mm should not be carried out.
Illustration in fig. 24:
1. Internal intake oil filter in casing - 2. Oil pump - 3. By-pass valve
- 4. Engine oil filter - 5. Pressure switch - 6. Main bearing - 7. Big end
bearing.
9.10 Lubrication circuit
Lubrication of the main bearings and connecting rod big end
is the forced type with a rotor oil pump.
Excessive pressure in the oil circuit is prevented by the by-
pass valve (3, fig. 24).
All the other parts are splash lubricated.
Oil vapours are eliminated from inside the casing by a
diaphragm mounted in the rocker arm cover.
9.9 Oil retention rings
Make sure that the rings have not hardened in the retention lip
and that there is no sign of breakage or wear.
Dimension
Dimension
Dimension
Dimension
Dimension
STD mm
STD mm
STD mm
STD mm
STD mm
-0,25 mm
-0,25 mm
-0,25 mm
-0,25 mm
-0,25 mm
A C
41.97
to
41.99
41.72
to
41.74
B
39.98
to
40
39.73
to
39.75
WARNING:
WARNING:
WARNING:
WARNING:
WARNING: do not remove material from the main journal
shims during the grinding operation as this would alter
crankshaft float. Also make sure that the grinder radii
correspond to those indicated in fig. 22 to prevent fracture
sections from initiating on the shaft.
Undersized bearings can be mounted without any reaming
work required.
R 1
R 1
R 1
R 1
R 1
R 0.5
R 0.5
R 0.5
R 0.5
R 0.5
R 3
R 3
R 3
R 3
R 3
3
3
3
3
3
2
2
2
2
2
11111
4
4
4
4
4
7
7
7
7
7
6
6
6
6
6
6
6
6
6
6
Содержание Ry100
Страница 1: ...Repair Manual for Diesel engines series RY cod 00497R0990 ...
Страница 2: ......
Страница 4: ...4 0 00497R0990 15 07 2000 DI ESEL ...
Страница 7: ...7 0 service 00497R0990 15 07 2000 3 OVERALL DIMENSIONS ...
