Iveco Daily Euro 4. Manual — part 84
Figure 8
The hydraulic clutch drive is composed of:
- a master cylinder (1) mounted on the pedal board and
connected to the clutch pedal (5), with an integrated oil
tank (3).
- an operating cylinder (7) fixed to the gearbox (6).
- an oil pipe (4).
The components of the hydraulic drive must never
be dismantled or separated from each other in any
way.
The cover (2) of the oil tank (3) must not be
removed.
This assembly requires no maintenance and the
hydraulic circuit must not be vented.
In the event of defectiveness, the entire assembly
needs to be replaced as it is supplied as a spare part,
proceeding as described under the relevant
heading.
The clip (8) holding the push rod (9) on the
assembly supplied as a spare part must not be
removed or cut.
50967
NOTE
16
CLUTCH
D
AILY
E
URO
4
HYDRAULIC CLUTCH DRIVE
Figure 9
62090
SPECIFICATIONS AND DATA
CLUTCH
17
D
AILY
E
URO
Main cylinder diameter
18 mm
Main cylinder section
254,47 mm
2
Operating cylinder diameter
22 mm
Operating cylinder section
346,36 mm
2
Clutch pedal ratio
5,85
Hydraulic ratio
1,36
Clutch disengagement lever ratio
1,67
Overall reduction ratio
13,28
Max disengagement stroke X
Y (94)
F (99)
J (98.7) mm
Max wear stroke Y
Y (67,5) F (70.8) J (69,1) mm
Y 9 ”
1
/
4
CLUTCH
F 10 ”
1
/
2
CLUTCH
J 11” CLUTCH
Position the vehicle over the pit or on the lift.
From inside the cab, using a screwdriver, unhook the swivel
head (2) of the master cylinder push rod from the clutch pedal
link pin (3).
Figure 10
Working from the engine bay, turn the master cylinder (4) to
the right (approx. 1/8 of a turn) to align the square of the hole
(A) in the pedal board (1) with the square (B) of the master
cylinder body and extract it from the pedal board (1).
Working under the vehicle, disengage the operating cylinder
(8 detail C) by unscrewing the screws (6 detail C) securing the
cylinder mounting (7 detail C) from the gearbox.
Remove the hydraulic clutch drive assembly from the vehicle.
Do not act on the pin (3) to prevent it coming out of
the pedal board (1).
50968
For refitting, carry out the operations for removal in reverse
order, taking the following precautions:
- Do not press the clutch pedal until refitting is complete.
- During assembly, handle parts carefully.
- Lubricate
the
contact
surfaces
of
the
clutch
disengagement lever with the clutch pedal link pin.
- Lubricate the contact surface of the master cylinder swivel
head with the clutch pedal link pin.
- After refitting the operating cylinder mounting to the
gearbox, check that the cylinder push rod is aligned with
the clutch disengagement lever seat.
- If replacing with a new hydraulic drive assembly, after
refitting, press firmly on the clutch pedal so as to break or
free the clamp holding the push rod (9).
- Lift the clutch pedal by hand with a force of no greater
than 5 daN to its limit and hold it in this position for at least
five seconds so that the oil from the tank will supply the
master cylinder. Repeat this operation if necessary.
Removal
Refitting
NOTE
18
CLUTCH
D
AILY
E
URO
4
52235
52236
87895
Figure 11
Figure 12
Figure 13
MASTER CYLINDER
OPERATING CYLINDER
The operating cylinder makes up for the wear of the driven disc marking an increase in load on the pedal during disengagement when
the wear on the driven disc gets to be 90%.
Maximum disengagement position when new
a = 121.8 mm.
a1 = 112.8 mm.
Engagement position when new
b = 99.3 5.8 mm.
b1 = 89.8 mm
Minimum position with worn disc
c = 73.3 mm.
c1 = 63.8 mm
CLUTCH
19
D
AILY
E
URO
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