Check AdBlue(R) concentration

AR49.20-B-9264EVI

Check AdBlue(R) concentration

03.08.2018

Engine

936.9 in model 382.155/189

with code MS6 (Euro VI)

1

Prism

2

Maintenance cover

3

Regulating screw

4

Eyepiece

5

Refractometer

A

Brix scale

B

AdBlue scale



Check

1

Adjust the refractometer (5) to determine the AdBlue concentration

AR49.20-B-9264-01EVI

 The refractometer (5) is extremely sensitive to impact and scratches.

2

Remove a little volume of AdBlue from its tank

3

Apply 1 or 2 drops of AdBlue on the prism (1) of the refractometer (5)


Observe for that the other parts of the refractometer (5) does not contact the fluid, because it can enter in the refractometer,
If the fluid enters in the refractometer, it can damage the equipment.

 By closing the maintenance cover (2), the AdBlue is evenly distributed.

4

Look through the sight glass (4) against a light background

 Scales can be adjusted by turning the sight glass (4).

5

Read the measurement value in the light/dark limit of the scale (B) of AdBlue


The urea index of the AdBlue is 32.5 %. Little deviations are adjusted by the exhaust gas post-treatment system. The concentration of AdBlue is correct when the urea index is above 30 %. If this is not the case,
The AdBlue must be changed.

6

Carefully clean the prism (1) and the tilting cover (2) of any waste of AdBlue


Observe for that the other parts of the refractometer (5) does not contact the fluid, because it can enter in the refractometer,
If the fluid enters in the refractometer, it can damage the equipment.

 For cleaning, it must only be used water without adding cleaning products.