Check ADBLUE (R) Concentration - Ar49.20-D-9264TS

Engine 642 in model 907 

Engine 651 in model 907 

	Risk of burn injuries and scalding  when working on AdBlue (R) lines and the component parts attached to them. Risk of injury  to skin and eyes when handling AdBlue (R). Risk of poisoning  caused by swallowing AdBlue (R)	Pour AdBlue® only into suitable containers. Wait until the pressure is released before starting any work on the exhaust aftertreatment system.	AS49.20-Z-0002-01A
	Notes on use, material properties and handling of NOx reducing agent		AH49.20-N-0002-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove
1	Adjust the refractometer (5)		AR49.20-D-9264-01TS
	000 588 08 21 00 Test and measuring kit		WS14.00-P-0012B
2	Remove cap of AdBlue® tank	Model 907 with code K52 (lockable DEF filler cap) Models 907 with code K53 (lockable AdBlue filler cap) To do this, release and unscrew the cap using the vehicle tool kit.
3.1	Remove a small amount of AdBlue® from the filler neck of the AdBlue® tank using a pipette	For a completely charge AdBlue® tank.
	000 588 08 21 00 Test and measuring kit		WS14.00-P-0012B
3.2	Suction off a small amount of AdBlue® from the AdBlue® tank	For a not completely charge AdBlue® tank.	AR49.20-D-2014-01TS
	000 588 01 71 00 Extraction pump		WS14.00-P-0013B
	Check
4	Place 1 to 2 drops of AdBlue® on the prism (1 of the refractometer (5) and close the hinged lid (2)	Only the prism (1) and the folding lid (2) may come into contact with the AdBlue®. AdBlue® can find its way into the refractometer (5) otherwise and damage it.
5	Bring the scales of scale (B) for AdBlue® into focus by turning the eyepiece (4)	To do this, look through the eyepiece (4) against a light background when turning.
6	Read off the measurement at the light-dark boundary on the AdBlue® scale (B)	NOx reducing agent urea content If necessary ↓	*BE49.20-N-1001-01A
		Carefully adjust adjustment screw (3) using a screwdriver so that the light/dark border matches the zero line (water line). If the AdBlue® concentration in not sufficient. ↓ Replace AdBlue®.	AR49.20-D-2015TS
	Clean
7	Carefully remove any AdBlue® from the prism (1) and hinged lid (2)	Only the prism (1) and the hinged lid (2) should come into contact with the fluid. AdBlue® can find its way into the refractometer (5) otherwise and make it unusable. Only use water without any additive as a cleaning agent.
	Install
8	Install the cap of the AdBlue® tank

NOx reducing agent check values