B3FI07K1 - 406D9
DRAINING - FILLING - BLEEDING : BRAKE SYSTEM
1 - RECOMMENDATION BEFORE BLEEDING A BRAKE CIRCUIT
IMPERATIVE : use only approved and recommended hydraulic fluid(s) : DOT4 .
IMPERATIVE : use only clean fluid free from bubbles .
IMPERATIVE : during the bleeding operation : keep the fluid topped up in the reservoir ; avoid any introduction of impurities into the hydraulic system .
Vehicle fitted with a load sensing compensator .
IMPERATIVE : bleeding must be carried out with the vehicle on its four wheels (circulation of the brake fluid in the compensator) .
2 - BLEEDING OF THE ESP PRELOAD PUMP HYDRAULIC CIRCUIT (ACCORDING TO SPECIFICATION)
2 - 1 - DESCRIPTION OF THE ESP PRE-CHARGE PUMP HYDRAULIC CIRCUIT
DYNAMIC STABILITY CONTROL
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(1) Reservoir .
(2) Pre-charge pump .
(3) Low pressure pipe (intake) .
(4) High pressure pipe (discharge) .
(5) Master cylinder .
ALL MODELS
2 - 2 - COMPULSORY BLEEDING OF THE ESP PRE-CHARGE PUMP HYDRAULIC CIRCUIT
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Bleeding the main circuit does not permit bleeding of the esp preload pump hydraulic circuit .
Therefore, air may be pushed back into the main circuit when the esp preload pump is operated .
IMPERATIVE : bleed the esp preload pump hydraulic circuit .
Bleed the circuit - In the following cases :
ALL MODELS
2 - 3 - BLEEDING
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BLEED THE MAIN CIRCUIT UNDER PRESSURE .
NOTE : bleeding the main circuit does not permit bleeding of the esp preload pump hydraulic circuit ; to complete bleeding, the esp preload pump must be operated using the diag 2000 .
Connect the diagnostic equipment DIAG 2000 to the diagnostic socket, then follow the instructions .
ALL MODELS
3 - BLEEDING OF THE ESP OR ABS SYSTEM HYDRAULIC UNIT
3 - 1 - INDICATION
As the hydraulic units are supplied charged with brake fluid, it is not necessary to activate the solenoid valves to bleed the hydraulic units .
IF, HOWEVER, THE BLEEDING OF THE CIRCUIT IS NOT SATISFACTORY, BLEED AGAIN UNDER PRESSURE AND THEN BLEED THE HYDRAULIC UNIT USING THE DIAGNOSTIC EQUIPMENT DIAG 2000 FOLLOWING THE INSTRUCTIONS GIVEN (There may be some air remaining at the hydraulic unit solenoid valves) .
3 - 2 - BLEEDING OF THE HYDRAULIC UNIT
Bleed the main circuit under pressure .
Connect the diagnostic equipment DIAG 2000 to the diagnostic socket, then follow the instructions .
4 - BRAKE CIRCUIT DRAINING - FILLING
Remove the filter from the brake fluid reservoir .
Drain the brake fluid reservoir using a clean syringe .
Refit the brake fluid reservoir filter .
Renew the brake fluid in the calipers by bleeding the circuit until clean fluid flows out .
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Bleed the esp pre-charge pump hydraulic system using the diagnostic equipment DIAG 2000 .
ALL MODELS
5 - BLEEDING UNDER PRESSURE (FIRST BLEED PROCEDURE)
5 - 1 - SPECIAL TOOLS
[1] CMBB-T935 R type pressurising equipment .
5 - 2 - BLEEDING UNDER PRESSURE
Connect the equipment [1] to the brake fluid reservoir .
Place the brake fluid under pressure (between 2 and 2.5 bars) .
IMPERATIVE : start the engine .
Order for opening the bleed screws :
Open the left front bleed screw (1) .
WARNING : the calliper BREMBO has 2 bleed screws : start bleeding with the bleed screw on the steering wheel side .
Bleed by pressing the brake pedal slowly and fully several times, together with a slow pedal return .
Carry out approximately 20 pumping cycles per front bleed screw .
Close the bleed screw as soon as the liquid flows without bubbles .
PROCEED IN THE SAME WAY FOR THE OTHER BLEED SCREWS FOLLOWING THE ORDER SPECIFIED .
Carry out approximately 20 pumping cycles per rear bleed screw .
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When bleeding of the braking circuit is complete :
Check the pedal travel .
If the travel is long and spongy, repeat the bleed procedure .
6 - MANUAL BLEEDING (AT THE PEDAL) (SECOND BLEED PROCEDURE)
DYNAMIC STABILITY CONTROL
WARNING : do not use this method for vehicles fitted with the esp system .
ALL MODELS
IMPERATIVE : start the engine .
A : BREMBO caliper (At the front) .
B : LUCAS caliper (At the front) .
Two operators are necessary .
Connect a transparent pipe to the left front bleed screw (1) .
Open the bleed screw .
WARNING : the calliper BREMBO has 2 bleed screws : start bleeding with the bleed screw on the steering wheel side .
IMPERATIVE : press the brake pedal slowly .
Hold the pedal fully down .
Close the bleed screw .
Follow the brake pedal return sowly .
Repeat the operation until the brake fluid runs out clean and free from bubbles .
PROCEED IN THE SAME WAY FOR THE OTHER BLEED SCREWS FOLLOWING THE ORDER SPECIFIED .
IF BLEEDING OF THE ESP HYDRAULIC UNIT IS NECESSARY, USE THE DIAGNOSTIC EQUIPMENT DIAG 2000 .
When bleeding of the braking circuit is complete ; Press the brake pedal firmly 4 times .
Check the pedal travel .
If the travel is long and spongy, repeat the bleed procedure .
7 - TIGHTENING TORQUE(S)
Front bleed screw :
Rear bleed screw : 0.5 da.Nm .