Replace brake fluid

AP42.00-G-4280C

Replace brake fluid

16.8.11

Bleeding

Danger!

Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes.

Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.

AS42.50-Z-0001-01A

1

Mark fluid level of brake fluid reservoir (1, 2, 3, 4)

2

Screw down caps (5) of brake fluid reservoirs (1, 2, 3, 4)

3

Extract brake fluid from brake fluid reservoir (1, 2, 3, 4)

 The level of the brake fluid should still extend to above that of the supply opening.



Brake fluid notes

AH42.50-P-0001-01A

4

Pour in fresh brake fluid up to "MAX" mark on brake fluid reservoirs (1, 2, 3, 4)

 On vehicles with code (A28) Hub reduction gear encapsulation for extremely muddy operating environments, only the brake fluid DOT 4 type 200 should be used. The brake system will overheat if a different brake fluid type is used.



*BF42.10-N-1001-01A

5

Connect filler/bleeder unit to brake fluid reservoir (1) and apply specified pressure to brake system

 Pay attention to manufacturer's operating instructions. Bleed pressure 2.0 bar.

 Vent fitting

*000589032500

6

Connect bleed hose of brake fluid receptacle to bleed valve (6) of left front axle

 Carry out the bleeding procedure at all brake calipers at each hub drive.

7

Open vent valve (6) by one or two turns

 Leave the bleed valve (6) open until the brake fluid escapes free of bubbles and without contaminants (bright color of brake fluid).



*BF42.10-N-1001-01A

8

Close the bleed valve (6)

9

Switch off and remove filler/bleeder unit

 Pay attention to manufacturer's operating instructions.

 Vent fitting

*000589032500

10

Renew brake fluid at right front axle and left and right rear axle

 See operation steps 4 to 9.

Perform bleeding procedures on all brake calipers at each hub reduction gear.



*BF42.10-N-1001-01A

11

Inspect braking system for proper operation and leaks

 Fully depress brake pedal several times. If after the brake fluid change is carried out there is a suspicion of the presence of air in the brake circuit: 

Bleed brake system

AR42.10-G-0010C

12

Correct brake fluid level in brake fluid reservoir (1, 2, 3, 4)

 Produce the marked brake fluid level again.

Risk of contaminating brake fluid; ensure scrupulous cleanliness when topping up brake fluid.

13

Tighten caps (5) of brake fluid reservoirs (1, 2, 3, 4)

Number

Designation

Model
437.420/425
without code
X18, X20, A28

Model
437.420/425
with code
X18, X20

Model
437.420/425
with code A28

BF42.10-N-1001-01A

Brake fluid

Filling capacity

Liters

1.4

2.0

1.4

Specifications for Operating Fluids

Sheet

BB00.40-P-0331-00A

BB00.40-P-0331-00A

BB00.40-P-0331-01A

Number

Designation

Model
437.421/426 without code
X18, X20, A28

Model
437.421/426
with code
X18, X20

Model
437.421/426
with code
A28

BF42.10-N-1001-01A

Brake fluid

Filling capacity

Liters

1.4

2.0

1.4

Specifications for Operating Fluids

Sheet

BB00.40-P-0331-00A

BB00.40-P-0331-00A

BB00.40-P-0331-01A

Number

Designation

Model
437.430/435
without code
X19, X20

Model
437.430/435
with code
X19, X20

Model
437.431/436
without code
X19, X20

BF42.10-N-1001-01A

Brake fluid

Filling capacity

Liters

1.6

2.4

1.6

Specifications for Operating Fluids

Sheet

BB00.40-P-0331-00A

BB00.40-P-0331-00A

BB00.40-P-0331-00A

Number

Designation

Model
437.431/436
with code
X19, X20

Model
437.460/465
without code
X19, X20

Model
437.460/465
with code
X19, X20

BF42.10-N-1001-01A

Brake fluid

Filling capacity

Liters

2.4

1.6

2.4

Specifications for Operating Fluids

Sheet

BB00.40-P-0331-00A

BB00.40-P-0331-00A

BB00.40-P-0331-00A