Remove/install pressure limiting valve at air controller unit of the exhaust aftertreatment system · ar1440d2016ad · Mercedes-Benz WIS

AR14.40-D-2016AD

Remove/install pressure limiting valve at air controller unit of the exhaust aftertreatment system

24.6.10

ENGINES 900.917 /918 /919 in MODELS 668, 670

D14.40-0095-05

Shown on model 668.32 (platform truck)

1 Compressed-air line

2 O-ring

3 Bolt

30.03 Pressure limiting valve with vent

 	Remove/install
1	Switch off ignition	 Air lines have compressed applied to them for up to 3 min after stopping the engine by the EATS. It is only after this that work can be begun on the EATS.
2	Loosen compressed air line (1) on pressure limiting valve with ventilation (30.03) by about two revolutions and release existing compressed air
3	Remove compressed air lines (1) on pressure limiting valve with venting (30.03)	 Installation: Replace O-rings (2) on the air lines (1).
			*BA14.40-N-1022-02E
			*BA14.40-N-1023-02E
4	Remove bolt (3) and pressure limiting valve with venting (30.03)	 Counterhold nut.
			*BA14.40-N-1021-02E
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
5	Install in the reverse order
 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
6	Allow engine to run and fill compressed air system up to shutoff pressure then stop engine
7	Check pressure limiting valve with ventilation (30.03) for leaktightness

 Exhaust aftertreatment, Blue Tec

Number	Designation		Engine 900.9 in model 668, 670


BA14.40-N-1021-02E	Air pressure limiter valve on bracket	Nm	20
BA14.40-N-1022-02E	Check valve compressed air connecting line to pressure limiting valve	Nm	10
BA14.40-N-1023-02E	Compressed air operating line to pressure limiting valve	Nm	10

ah0000n000101a Notes on self-locking nuts and bolts
as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.