ar4210s001007a

Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual assistance

Type ar · topic 42.10 · version 0102 · 2009-02-10

Applies to: MODEL 638 with CODE (BB0) Antilock brake system (ABS) with CODE (CL0) Rear air suspension, lowerable and liftable

Where it sits

Function group 2 Chassis › 42 Brakes - hydraulic and mechanical systems › 42.10 Service brake — Series 638

EinPAS 21 Brakes/vacuum system/compressed-air system › 21.15 Service brake/vacuum system › 21.15.5 Brake system, complete — Series 638

AR42.10-S-0010-07A

Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual assistance

Test values for hydraulic braking system

Number

Designation

Model
638

BE42.50-N-1001-01B

Venting pressure at
expansion reservoir

bar

2...2.5

Brake system

Number

Designation

Model 638

BF42.00-N-1001-01A

Brake fluid

TT brake circuit configuration

Liters

-

X brake circuit configuration

Liters

0,4

with ABS/ABD
or ABS/ETS

Liters

0,8

Specifications for Operating Fluids

Sheet

BB00.40-P-0331-00A

Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual 
	assistance

S42.10-4007-06

1 Carry out bleeding process as per the specifications of the Star Diagnose Compact System or handheld tester (HHT) (01).

Under menu item:

Process ABS -> system test -> exception bleeding -> as per the sequence:

- Right rear bleed valve (1)

- Left front bleed valve (2)

- Left rear bleed valve (3)

- Right front bleed valve (4)

Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual 
	assistance

S42.50-0029-01

2 Operate actuation of rear right wheel.

Operate brake pedal during the actuation.

3 Open bleed valve on right rear fixed brake caliper, allow brake fluid to flow out free of bubbles.

Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual 
	assistance

S42.50-0030-01

4 Operate actuation of front left wheel.

Operate brake pedal during the actuation.

5 Open bleed valve on left front fixed brake caliper, allow brake fluid to flow out free of bubbles.

Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual 
	assistance
Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual 
	assistance

S42.50-0029-01

6 Operate actuation of rear left wheel.

Operate brake pedal during the actuation.

7 Open bleed valve on left rear fixed brake caliper, allow brake fluid to flow out free of bubbles.

S42.50-0030-01

4 Operate actuation of front left wheel.

Operate brake pedal during the actuation.

5 Open bleed valve on left front fixed brake caliper, allow brake fluid to flow out free of bubbles.

Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual 
	assistance

S42.50-0030-01

8 Operate actuation of front right wheel.

Operate brake pedal during the actuation.

9 Open bleed valve on right front fixed brake caliper, allow brake fluid to flow out free of bubbles.