Checking service pressures on four-circuit protection valve · ar4260i0040b · Mercedes-Benz WIS

AR42.60-I-0040B

Checking service pressures on four-circuit protection valve

24.4.07

MODEL 684.482

Checking service pressures on four-circuit protection valve

I42.60-0106-06

1 Adjustment screw for circuit 1

2 Adjustment screw for circuit 2

3 Adjustment screw for circuit 3

4 Adjustment screw for circuit 4

5 Four-circuit protection valve

6  Pressure gage

 Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
1	Check pressure regulator cutoff pressure		AR42.60-I-0020B
2	Depressurize air brake system	 Pull vent valve on compressed-air reservoir.
3	Detach the compressed air line of circuit 1 connection of the 4-circuit protection valve (5) and connect the pressure gauge (6)		*360589002100
4	Detach compressed air line on circuit 2 connection
5	Charge air brake system	 Start engine and run at idling speed.
6	Read off maximum pressure on the pressure gauge (6)	 If the protection pressure deviates from the specified value: 	*BE42.10-N-1009-10G
		Adjust pressure by turning the circuit 1 adjustment screw (1).
7	Depressurize air brake system	 Switch off engine and remove vent valve on the compressed air reservoir.
8	Disconnect pressure gauge (6) from circuit 1 connection
9	Connect pressure gauge (6) onto circuit 1 connection of 4-circuit protection valve (5)		*360589002100
10	Charge air brake system	Start engine and run at idling speed.
11	Read off maximum pressure on the pressure gauge (6)	 If the protection pressure deviates from the specified value: 	*BE42.10-N-1009-10G
		Adjust pressure by turning the circuit 2 adjustment screw (2).
12	Depressurize air brake system	 Switch off engine and remove vent valve on the compressed air reservoir.
13	Disconnect pressure gauge (6) and fit compressed air lines to circuit 1 and 2 connections	 Install new sealing rings.
14	Detach the compressed air line of circuit 3 connection of the 4-circuit protection valve (5) and connect the pressure gauge (6)		*360589002100
15	Detach compressed air line on circuit 4 connection
16	Charge air brake system	 Start engine and run at idling speed.
17	Read off maximum pressure on the pressure gauge (6)	 If the protection pressure deviates from the specified value: 	*BE42.10-N-1010-10G
		Adjust pressure by turning the circuit 3 adjustment screw (3).
18	Depressurize air brake system	 Switch off engine and remove vent valve on the compressed air reservoir.
19	Disconnect pressure gauge (6) from circuit 3 connection
20	Connect pressure gauge (6) onto circuit 4 connection of 4-circuit protection valve (5)		*360589002100
21	Charge air brake system	 Start engine and run at idling speed.
22	Read off maximum pressure on the pressure gauge (6)	 If the protection pressure deviates from the specified value: 	*BE42.10-N-1010-10G
		Adjust pressure by turning the circuit 4 adjustment screw (4).
23	Depressurize air brake system	 Switch off engine and remove vent valve on the compressed air reservoir.
24	Disconnect pressure gauge (6) and fit compressed air lines to circuit 3 and 4 connections	 Install new sealing rings.
25	Check pressure regulator cutoff pressure		AR42.60-I-0020B

Test values for service brake

Number	Designation		Model 684.482


BE42.10-N-1009-10G	Protection pressure for circuit 1 and 2	bar	6.5 to 6.8
BE42.10-N-1010-10G	Protection pressure for circuit 3 and 4	bar	6.2 to 6.5

Test kit

360 589 00 21 00

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