Iveco Daily Euro 4. Manual — part 215
Figure 47
526716
Electro-hydraulic
modulator/control unit for 29L - 35S
vehicles )
ABS8/ESP8 systems
The electronic control unit has the task of controlling the
electro-hydraulic modulator solenoid valves according to the
signals from the wheel speed sensors.
The electro-hydraulic modulator modulates the pressure of
the brake fluid in both front and rear circuits according to the
control signals from the control unit.
The devices comprising the control unit and
electro-hydraulic modulator of the various models
are not interchangeable.
NOTE
The parts inside the hydraulic unit are not
compatible with mineral oil and unsuitable fluids.
In case of contamination by such fluids, the unit
shall be replaced and properly disposed of.
1. Hydraulic accumulator - 2. Electro-hydraulic modulator - 3. Electronic control unit - A. ABS8 connector -
B. ESP8 connector - F/MC1. Front axle power supply - R/MC2. Rear axle power supply - LF (or FL for ABS8/ESP8 systems).
Left front axle output - RR. Right rear axle output - RF (or FR for ABS8/ESP8 systems). Right front axle output - LR (or RL
for ABS8/ESP8 systems) . Left rear axle output
102113
62
HYDRO-PNEUMATIC SYSTEM - BRAKES
D
AILY
E
URO
4
Figure 48
526716
Electro-hydraulic
modulator/control unit for 29L - 35S
vehicles )
ABS8 systems (vehicles 35C - 65C) / ESP8 (vehicles 35C only)
The electronic control unit has the task of controlling the
electro-hydraulic modulator solenoid valves according to the
signals from the wheel speed sensors.
The electro-hydraulic modulator modulates the pressure of
the brake fluid in both front and rear circuits according to the
control signals from the control unit.
The devices comprising the control unit and
electro-hydraulic modulator of the various models
are not interchangeable.
NOTE
The parts inside the hydraulic unit are not
compatible with mineral oil and unsuitable fluids.
In case of contamination by such fluids, the unit
shall be replaced and properly disposed of.
1. Hydraulic accumulator - 2. Electro-hydraulic modulator - 3. Electronic control unit - A. ABS8 connector -
B. ESP8 connector - F/MC1. Front axle power supply - R/MC2. Rear axle power supply - LF (or FL for ABS8/ESP8 systems).
Left front axle output - RR. Right rear axle output - RF (or FR for ABS8/ESP8 systems). Right front axle output - LR (or RL
for ABS8/ESP8 systems) . Left rear axle output
102114
HYDRO-PNEUMATIC SYSTEM - BRAKES
63
D
AILY
E
URO
4
526713
Rev sensor
526712
Phonic wheels
35383
The system for measuring the speed of rotation of the wheels
is composed of the wheel speed sensor and the phonic wheel.
The phonic wheel is housed or incorporated in the brake disc
of the wheel and turns at the same speed as the wheel. By
induction in the sensors it generates alternating voltages whose
frequency is in proportion to the speed of rotation of the
respective wheel. These voltage signals are transmitted to the
control unit for processing.
ESP SYSTEM SENSORS
Yaw sensor with built-in side acceleration
sensor
It measures the motion of the vehicle around its own vertical
axis (yaw) as well as the vehicle’s side acceleration.
These signals continuously inform the control unit about the
vehicle’s behaviour.
The comparison between these signals and those from the
driver (steering-wheel position, wheel spin number/speed
and pressure on the brake pedal/accelerator position) allows
the ESP control unit to define the actions to be taken. The
hydraulic unit controls brake pressure as quickly as possible,
separately for every single wheel.
Moreover, the ESP system may decrease the engine revs
number by means of the engine control feature.
102115
Longitudinal acceleration sensor
102116
It measures the vehicle’s acceleration and deceleration
changes.
These signals continuously inform the control unit about the
vehicle’s behaviour.
The comparison between these signals and those from the
driver (steering-wheel position, wheel spin number/speed
and pressure on the brake pedal/accelerator position) allows
the ESP control unit to define the actions to be taken. The
hydraulic unit controls brake pressure as quickly as possible,
separately for every single wheel.
Moreover, the ESP system may decrease the engine revs
number by means of the engine control feature.
Steering angle sensor
102117
It measures the steering angle required by the driver.
The comparison between this signal and those from all the
other sensors allows the ESP control unit to define the
actions to be taken. The hydraulic unit controls brake
pressure as quickly as possible, separately for every single
wheel.
Moreover, the ESP system may decrease the engine revs
number by means of the engine control feature.
Figure 49
Figure 50
Figure 51
Figure 52
64
HYDRO-PNEUMATIC SYSTEM - BRAKES
D
AILY
E
URO
4
Disconnect electrical connection (3) of wear sensor from
chassis cable and release the cable of the electrical
connection from securing blade (2).
Remove rubber protection plug (1).
Set the vehicle on level ground and lock the rear wheels. Loosen
the nuts (1) securing the front wheels. Lift the front of the
vehicle with a hydraulic lift and rest it on two stands (3).
Front brakes
The following operations have been carried out on vehicles
with 2x48 Brembo front calipers.
455026
Figure 53
527417
Replacing brake linings
For 2x48 brake calipers
Figure 54
109122
109132
Figure 55
Figure 56
Disconnect cable (4) from braking gasket (3) and unthread
the cable from brake caliper (5).
Dismount braking gaskets (2 and 3) from caliper support (1).
Remove screw (3) securing brake caliper (2) to support (4).
Move bush (1) inside brake caliper (2), tilt the brake caliper.
Figure 57
109131
!
The braking system effects safety. All repairs and
servicing operations must be exclusively carried out
by skilled, qualified personnel.
!
The oil inlet hose to the calliper must not be
disconnected during the operations that follow.
Retracting the pistons will increase the level of brake
fluid in the reservoir. For this reason, check the fluid
does not spill out of the reservoir and damage
vehicle paintwork during the operation.
109133
Withdraw pistons (1) by a retractor or other suitable tool (2),
paying attention not to damage piston surfaces and
protection cowlings.
HYDRO-PNEUMATIC SYSTEM - BRAKES
65
D
AILY
E
URO
4
BRAKE REPAIR OPERATIONS
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст