Testing Coolant Freeze Point

TS1732-UN-04SEP13

SERVICEGARD™ Part Number 75240

TS1733-UN-04SEP13

Image with a Drop of 50/50 Coolant Placed on the Refractometer Window

The use of a handheld coolant refractometer is the quickest, easiest, and most accurate method to determine coolant freeze point. This method is more accurate than a test strip or a float-type hydrometer which can produce poor results.

A coolant refractometer is available through your John Deere dealer under the SERVICEGARD™ tool program. Part number 75240 provides an economical solution to accurate freeze point determination in the field.

To use this tool:

1. Allow cooling system to cool to ambient temperatures.

2. Open radiator cap to expose coolant.

3. With the included dropper, collect a small coolant sample.

4. Open the lid of the refractometer, place one drop of coolant on the window and close the lid.

5. Look through the eyepiece and focus as necessary.

6. Record the listed freeze point for the type of coolant (ethylene glycol coolant or propylene glycol) being tested.