Engines Iveco C10,C13, Cursor 10, Cursor 13. Manual — part 69
The surface of the bushings must show no sign of seizing or
scoring; replace them if they do.
Measure the inside diameter of the bushings with a bore
gauge.
60627
Figure 87
Figure 88
MAIN DATA OF THE CAMSHAFT AND TOLERANCES
The surfaces of the supporting pins of the shaft and those of the cams need to be extra smooth.
Whereas, if they show any signs of seizing or scoring, you should replace the shaft and the relevant bushings.
MAIN DATA OF THE BUSHINGS FOR THE CAMSHAFT AND SEATS ON THE CYLINDER HEAD
* Bushing inside diameter after driving in
Bushings
If you find a higher value than the tolerance, replace them.
To remove and fit the bushings, use the appropriate drift
99360499.
60626
40
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F3B CURSOR ENGINES
Base - May 2007
FEATURE SUBJECT OF TOLERANCE
SYMBOL
DIRECTION
Perpendicularity
⊥
POSITION
Concentricity or coaxiality
SWING
Circular oscillation
↗
CLASS OF IMPORTANT ASCRIBED TO PRODUCT CHARACTERISTICS
SYMBOL
CRITICAL
IMPORTANT
⊕
SECONDARY
⊝
Figure 89
A. Drift with seat for bushings to insert/extract. - B. Grub screw for positioning bushings. - C. Reference mark to insert
seventh bushing correctly. - D. Reference mark to insert bushings 1, 2, 3, 4, 5, 6 correctly (red marks). - E. Guide bushing. -
F. Guide line. - G. Guide bushing to secure to the seventh bushing mount. - H. Plate fixing yellow bushing to cylinder head.
- I. Grip. - L. Extension coupling.
Figure 90
The sequence for removing the bushings is 7, 6, 5, 4, 3, 2, 1.
The bushings are extracted from the front of the single seats.
Removal does not require the drift extension for bushings 5,
6 and 7 and it is not necessary to use the guide bushing.
For bushings 1, 2, 3 and 4 it is necessary to use the extension
and the guide bushings.
Position the drift accurately during the phase of removal.
Removal
Figure 91
Assembly
1 Position the bushing to insert on the drift (A) making the
grub screw on it coincide with the seat (B) (Figure 89) on
the bushing.
2 Position the guide bushing (E) and secure the guide
bushing (G) (Figure 89) on the seat of the 7
th
bushing
with the plate (H).
3 While driving in the bushing, make the reference mark (F)
match the mark (M). In this way, when it is driven home,
the lubrication hole on the bushing will coincide with the
oil pipe in its seat.
The bushing is driven home when the 1
st
red reference
mark (D) is flush with the guide bushing (G).
Assemble the drift together with the extension.
To insert bushings 1, 2, 3, 4 and 5, proceed as follows:
71723
Figure 92
To insert the bushing (6), proceed as follows:
- Unscrew the grip (I) and the extension (N).
- Position the extension (N) and the guide bushing (E) as
shown in the figure.
- Repeat steps 1, 2, 3.
Rear
Rear
77795
71725
Replacing camshaft bushes using beater 99360499
107217
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
41
F3B CURSOR ENGINES
70000
101509
87051
86290
MAIN DATA TO CONTROL EXHAUST AND
DISCHARGE VALVE SPRING
- fit springs (6) and the upper plate (5);
- apply tool 99360263 (2) and block it with bracket (4);
tighten the lever (1) until cotters are installed (3),
remove tool (2).
VALVE SPRINGS
Fitting the valves and oil seal ring
Free spring height
Valve closed
Valve open
71724
To insert bushing (7), proceed as follows:
- Unscrew the grip (I) and the extension (N).
- Refit the guide (G) from the inside as shown in the figure.
- Position the bushing on the drift (A) and bring it close
up to the seat, making the bushing hole match the
lubrication hole in the head. Drive it home.
The 7
th
bushing is driven in when the reference mark (C)
is flush with the bushing seat.
Before assembly, the flexibility of the valve springs must be
checked.
Compare the load and elastic deformation data with those
of the new springs given in the following figure.
Rear
Figure 93
Figure 94
Figure 95
Figure 96
Figure 97
Lubricate the valve stem and insert the valves in the
respective valve guides; fit the lower caps (1). Use tool
99360329 to fit the oil seal (2) on the valve guides (3) of the
exhaust valves; then, to fit the valves, proceed as follows.
42
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F3B CURSOR ENGINES
Base - May 2007
44925
The camshaft cams directly control rockers: 6 for injectors and 12 for valves.
Rockers slide directly on the cam profiles via rollers.
The other end acts on a bar directly supported by the two valves stems.
A pad is placed between the rocker adjusting screw and the bar.
Two lubrication holes are obtained inside the rockers.
The rocker shaft practically covers the whole cylinder head; remove it to have access to all the underlying components.
Figure 98
71728
71729
71730
Figure 99
Figure 100
Figure 101
PUMP INJECTOR ROCKER
EXHAUST VALVES ROCKER
The bush surfaces must not show any trace of scoring of
excessive wear; otherwise, replace bushes or the whole
rocker.
DISCHARGE VALVE ROCKER
Rocker
SECTION A-A
SECTION B-B
SECTION A-A
SECTION B-B
SECTION A-A
SECTION
B-B
Check that the surface of the shaft shows no scoring or signs of seizure; if it does, replace it.
MAIN DATA OF THE ROCKER ARM SHAFT
73557
Shaft
Figure 102
Figure 103
99376
ROCKER SHAFT
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
43
F3B CURSOR ENGINES
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст