Remove/install SCR air pressure limiter solenoid valve · ar1440w2015b · Mercedes-Benz WIS

AR14.40-W-2015B

Remove/install SCR air pressure limiter solenoid valve

22.3.11

ENGINES 457.9 in MODEL 940, 942, 943, 944 with CODE (MS4) BlueTec 4

ENGINES 457.9 in MODEL 940, 942, 943, 944 with CODE (MS5) BlueTec 5

W14.40-1171-06

1 Compressed air inlet

2 Compressed air outlet

3 Union nut

4 Electrical connector

5 Union nut

7.03 Overflow valve without return flow

30.03 Pressure limiting valve with vent

Y106 SCR air pressure limiter solenoid valve (33.01)

 	Remove/install
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on compressed air connection systems		AH00.18-N-0001-01A
1	Switch off ignition
2	Disconnect electrical connector (4) at SCR air pressure limiter solenoid valve (Y106)	 After turning off engine, individual lines are scavenged with compressed air for about 3 minutes. For this reason, do not start any work on the exhaust aftertreatment system before this time has passed.
3	Remove compressed air line at compressed air inlet (1)	 First loosen union nuts (5) by two revolutions to relieve pressure and then remove.
			*BA00.18-N-1002-01A
4	Remove compressed air line at compressed air outlet (2)	 First loosen union nuts (3) by two revolutions to relieve pressure and then remove.
			*BA00.18-N-1002-01A
5	Remove SCR air pressure limiter solenoid valve (Y106)		*BA14.40-N-1018-02B
6	Install in the reverse order
7	Pressurize the compressed-air system up to cutoff pressure

 Compressed air lines

Number	Designation			Model 940, 942, 943, 944


BA00.18-N-1002-01A	VOSS "232" compressed-air connection system	M161.5	Nm	12
		M221.5	Nm	12

 Exhaust aftertreatment, Blue Tec

Number	Designation		Engine 457.9 with code MS4 or code MS5


BA14.40-N-1018-02B	SCR air pressure limiter solenoid valve on bracket	Nm	7