WHEEL & TIRE GP 3728386 - Caterpillar

Required Tooling
Table 1
Required Tooling    
431-7087 Tool Gp (REFRACTOMETER (DEF))    Test Procedure
Illustration 1 g03370564
431-7087 Tool Gp (REFRACTOMETER (DEF))
Illustration 2 g03370553
Calibration point for distilled water
Follow the instructions included with the refractometer to calibrate the waterline of the meter.
Clean the refractometer and apply two drops of Diesel Exhaust Fluid (DEF) collected from the DEF tank.
Illustration 3 g03370573
Typical reading for DEF in good condition
Read the DEF quality in the refractometer. The DEF quality must measure between 29 and 35 percent. If the DEF does not meet specification, replace the DEF in the tank with new DEF. The new DEF must meet ISO 22241 standards.Note: Dispose of the DEF removed as per local regulations.