Automatic load-dependent brake - check play and adjustment · ap4280t4263d · Mercedes-Benz WIS

AP42.80-T-4263D

Automatic load-dependent brake - check play and adjustment

21.3.07

MODEL 436.330

T42.80-0004-11

Diagram for adjusting automatic load-dependent brake system

1 Rear axle

2 Front axle

A Length = 200 mm (operating lever)

B Length = 160 mm (control linkage)

x Rear axle load

y Brake pressure

T42.80-0003-01

3 Test connection upstream of ALB controller (uncontrolled)

4 Front axle test connection downstream of ALB controller (controlled)

5 Rear axle test connection downstream of ALB controller (controlled)

T42.80-0002-11

6 Control linkage

7 Actuating lever

	Check
1	Check that control linkage (6) and operating lever (7) can move easily and that joints are play-free
2	Check length (B) of control linkage (6) and length (A) of operating lever (7).	If necessary, adjust length of control linkage (6) and operating lever (7).
3	Determine rear axle load of vehicle in ready-to-drive condition		*385589052100
4	Pressurize compressed-air system up to cutoff pressure	Before fully depressing the brake pedal each time, the compressed-air system must be filled until the cutoff pressure is reached.
5	Connect pressure gauge to test connection (3)	 The uncontrolled brake pressure must be between 8.1 and 8.4 bar.
6	Connect pressure gauge test connections (4, 5)
7	Fully depress brake pedal	 For permissible values, see diagram for adjusting automatic load-dependent brake system. A deviation of  0.4 bar is permissible. If pressure deviates significantly: 
		Adjust the ALB controller - subject to separate repair order.
	Check/adjust automatic load-dependent brake (ALB)		AR42.80-T-0050U
8	Detach pressure gauge
9	Check brake system for leaks and proper function

Test balance

385 589 05 21 00