Check AdBlue® concentration

AR14.40-W-2041H

Check AdBlue® concentration

14.08.2018

Engine

470.9, 471.9, 473.9 in model 963, 964

Engine

934.9, 936.9 in model 967

Engine

936.9 in model 956, 963, 964

1

Prism

2

Hinged lid

3

Adjustment screw

4

Eyepiece

5

Refractometer

A

Brix scale

B

AdBlue® scale



Check

1

Adjust refractometer (5) to determine the AdBlue® concentration.

AR14.40-W-2041-01H

 The refractometer (5) is very sensitive to impacts and scratching.

2

Remove a small quantity of AdBlue® from AdBlue® tank using the siphon.

3

Place 1 to 2 drops of AdBlue® on prism (1) of refractometer (5).


Ensure that other parts of the refractometer (5) do not come into contact with AdBlue®.
Damage can occur if AdBlue® gets inside it.

 Closing the hinged lid (2) causes the AdBlue® to be distributed evenly.

4

See through the eyepiece (4) against a light background.

 The scales can be set to sharp by turning the eyepiece (4).

5

Read off measurement value at light/dark boundary of AdBlue® scale (B).

 The urea content of AdBlue® is 32.5 %. The exhaust aftertreatment system can compensate for slight deviations.
The AdBlue® concentration is OK if the urea content is greater than 30 %. If this is not the case, the AdBlue® must be replaced.

6

Carefully clean any AdBlue® residues from the prism (1) and the hinged lid (2).


Ensure that the other parts of the refractometer (5) do not come into contact with the fluid otherwise moisture could find its way inside the instrument.
Damage can occur if AdBlue® gets inside it.

 Only water without any addition of cleaning agent should be used to clean.