Coolant: Testing and Inspection
COOLANT CONCENTRATION TESTERS^ Tools Required
- J 26568 (Centigrade Scale)
- J 23688 (Fahrenheit Scale)
- Or Equivalents
NOTE: These tools can be used to check the antifreeze protection of coolant. Follow the manufacturer's directions on using these tools.
NOTE:
^ Both coolant testers automatically compensate for temperature.
^ Make sure eyepiece of coolant testers is totally free of solution before looking through it.
^ Before each use, swing plastic cover at slanted end of the coolant testers exposing measuring window and bottom of plastic coven
^ Wipe dry both prism and bottom of sample cover with tissue or clean soft cloth.
^ Close plastic cover.
1. Release tip of pump from the coolant testers housing.
^ Do not remove clear plastic pump from coolant testers.
^ Remove radiator cap.
3. Insert tube into coolant recovery reservoir.
^ Make sure tube is below level of coolant.
4. Press and release bulb to get sample of coolant.
5. Bend tube around the coolant testers so that tip can be inserted in cover plate opening.
6. Press bulb and allow a few drops to fall onto measuring surface.
^ Do not open plastic cover when talking readings because water evaporation can change readings.
7. Point the coolant testers toward any light source and look into eyepiece.
^ Coolant protection reading is at point where dividing line between light and dark crosses scale on right.
^ Temperature scale is reversed from a standard thermometer scale. Below zero readings are on upper half of scale.
^ If readings are not clear, the measuring prism was not cleaned and dried or there was not enough fluid on measuring prism.
Calibrating Testers
NOTE: The coolant testers are factory calibrated and sealed and should not require adjustment. If adjustment is required, follow instructions below.
1. Make sure coolant testers is between 21°C and 29°C (70°F and 85°F).
2. Using distilled water, take a reading. If reading departs from a 0°C (32°F) reading on scale, a correction can be made by adjusting screw on bottom of the coolant testers.
3. Remove sealant covering screw.
NOTE: Do not remove screw from the coolant testers.
4. Turn screw in direction necessary to adjust reading to 0°C (32°F) line.
5. Reseal the screw using a silicone sealant.