Engine Iveco Vector 8. Manual — part 37
Figure 37
Figure 38
α
α
Checking crankshaft thrust clearance
The thrust clearance of the crankshaft (2) is checked by placing
a dial gauge (1) with a magnetic base and proceeding as shown
in the figure. The normal assembly clearance is from 0.070 to
0.270 mm.
If a greater clearance is measured, replace the thrust washers
with new ones of the normal thickness or oversized, if
necessary.
The housing washers are not interchangeable with those of the
cap.
Remove again:
- main bearing housing caps;
- lubricate the main journals, main bearings and thrust
washers with engine oil;
- refit the main bearing caps and tighten the screws (2 and
3, Figure 34) to the prescribed torque.
- Arrange the thrust rings (2) on the central main bearing
housing (1) with the grooves facing the crankshaft shim
adjustment.
Fit the caps (1, Figure 34) back on and tighten the screws
(2, Figure 34) to the prescribed tightening torque.
1
2
When tightening to an angle, use tool 99395216.
- Remove caps from supports.
The backlash between the main bearings and the pins is found
by comparing the width of the calibrated wire (2) at the
narrowest point with the scale on the envelope (1) containing
the calibrated wire.
The numbers on the scale indicate the backlash in mm.
!
Once the screws securing (vertical and lateral) main
bearing caps have been screwed up, they must
compulsorily keep their position during caps
dismounting and remounting successive operations.
1
2
16855
16814
NOTE
22
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
VECTOR 8 ENGINES
Base - April 2006
Print P2D32V001E
Check that TDC coincides with the mark made:
- Rotate the crankshaft backwards.
- Rotate the crankshaft again, forwards, until the dial gauge
changes direction.
- Check that the point at which the dial gauge changes
direction (zero point on the dial gauge) coincides with the
reference marks made on the crankshaft andon the
cylinder block/crankcase.
Determine top dead centre (TDC) for cylinder 1 proceeding
as follows:
- Rotate the crankshaft so that the piston for cylinder 1 is
close to TDC.
- Fit the dial gauge as illustrated in the diagram.
- Carefully determine TDC (the point at which the dial
gauge pointer stops).
Figure 39
Figure 40
Figure 41
Figure 42
Trace two marks, one on the crankshaft key (1) and one
reference one on the cylinder block/crankcase:
- Rotate the crankshaft until a movement of the pointer is
detected on the dial gauge and then make a second mark
on the crankshaft (2).
- Measure the halfway point between the two reference
marks and make a third reference mark (3) on the
crankshaft.
- Fit the dial gauge on the exhaust tappet for cylinder no.
4.
- Search for the point at which the tappet on which the dial
gauge is fitted is fully lowered and zero the dial gauge.
113060
Camshaft timing
Method 1 (without equipment)
82240
113061
113062
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
23
VECTOR 8 ENGINES
Print P2D32V001E
Base - April 2006
Figure 43
Figure 44
- Rotate the crankshaft fowards until a lifting height of 5.48
mm is reached.
- The camshaft is timed if the reference mark made
previously on the crankshaft is aligned with the reference
on the cylinder block/crankcase.
If the above condition is not achieved, the camshaft should be
adjusted using the openings in the toothed wheel.
See timing diagrams overleaf.
82243
82244
Figure 45
113063
Fit the flywheel (2) taking care to ensure that the reference
markt (1) is aligned with the position of the camshaft rpm
sensor (see timing diagrams on the pages that follow).
Tighten the bolts (3) to the recommended torque.
24
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
VECTOR 8 ENGINES
Base - April 2006
Print P2D32V001E
Figure 46
112863
TIMING DIAGRAMS FOR THE FOLLOWING APPLICATIONS:G
DRIVE - GRIFFON - SPRINKLER
1. Camshaft - 2. Camshaft rpm sensor - 3. Camshaft flywheel - 4. Engine flywheel -
5. Crankshaft rpm sensor fitted on the flywheel casing
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
25
VECTOR 8 ENGINES
Print P2D32V001E
Base - April 2006
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