Engines Iveco C10,C13, Cursor 10, Cursor 13. Manual — part 68
41032
60619
Figure 75
Figure 76
Remove valve guides by means of tool 99360143.
Install by means of tool 99360143 equipped with part
99360296, which determines the exact installation position
of valve guides into the cylinder heads; if they are not
available, install the valve guides in the cylinder head so that
they project out by mm 30.8 to 31.2 (Figure 74).
After installing the valve guides, smooth their holes with
sleeker 99390330.
Check the valve seats (2). Should slight scratches or burns be
found, go over them with a suitable tool (1) according to the
inclination values shown in Figure 73. If it is necessary to
replace them, using the same tool and taking care not to
affect the cylinder head, remove as much material as possible
from the valve seats so that, with a punch, it is possible to
extract them from the cylinder head.
Heat the cylinder head to 80 — 100
°C and, using a drift, fit in
the new valve seats (2), chilled beforehand in liquid nitrogen.
Using tool (1), regrind the valve seats according to the angles
shown in Figure 74.
After regrinding the valve seats, using tool 99370415 and dial
gauge 99395603, check that the position of the valves in
relation to the plane of the cylinder head is:65
- -0.65 - -0.95 mm (recessing) intake valves
- -18 - -2.1
05
mm (recessing) exhaust valves.
To replace the injector case (2), act as follows:
- thread the case (2) with tool 99390804 (1).
Carry out operations described in figs. 77 - 80 - 81 - 82 by
fixing tools to the cylinder head by means of braket A.
Replacing of valve guides
Replacing injector cases
Removal
Replacing - Reaming the valve seats
To replace the valve seats, remove them using the
appropriate tool.
Valve seats must be reamed whenever valves or
valve guides are replaced or ground.
NOTE
36
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F3B CURSOR ENGINES
Base - May 2007
60621
- Using the tool 99390772 (2) remove any residues (1) left
in the groove of the cylinder head.
- Screw the extractor 99342149 (2) into the case (3).
Screw down the nut (1) and take the case out of the
cylinder head.
60620
60622
- Lubricate the seals (3) and fit them on the case (4). Using
tool 99365056 (2) secured to the cylinder head with
bracket A, drive in the new case, screwing down the
screw (1) upsetting the bottom portion of the case.
60623
- Using the reamer 99394041 (1-2), rebore the hole in the
case (3).
Figure 77
Figure 78
Figure 79
Figure 80
Assembly
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
37
F3B CURSOR ENGINES
60624
47585
Check injector protrusion (2) with the dial gauge (1).
The protrusion must be 0.52 - 1.34 mm.
Checking injector protrusion
71720
INJECTOR CASE ASSEMBLY DIAGRAM
Figure 81
- Using the milling cutter 99394043 (1-2), regrind the
injector seat in the case (3).
Figure 82
Figure 83
38
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F3B CURSOR ENGINES
Base - May 2007
47506
47505
47507
Figure 84
Figure 85
Figure 86
Camshaft
Checking cam lift and pin alignment
When the camshaft (4) is on the tailstock (1), check alignment of supporting pin (3) using a centesimal gauge (2); it must not
exceed 0.030 mm. If misalignment exceeds this value, replace the shaft.
In order to check installation clearance, measure bush inner diameter and camshaft pin (1) diameter; the real clearance is obtained
by their difference.
If clearance exceeds 0.135 mm, replace bushes and, if necessary, the camshaft.
Place the camshaft (4) on the tailstock (1) and check cam lift (3) using a centesimal gauge (2).
1
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
39
F3B CURSOR ENGINES
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