Caterpillar — Cooling System Supplemental Coolant Additive (SCA) - Test/Add
Maintenance
From a Caterpillar owner's manual covering: 3126B, 3126B Petroleum Engine, Z2A1-Up. Check it applies to your exact model before use.
Applies to: Caterpillar 3126B
Before you start
- Cooling system coolant additive contains alkali; avoid contact with skin and eyes.
Procedure
- Fill the syringe to the 1.0 ml mark with coolant.
- Dispense the 1.0 mL sample into the empty mixing bottle.
- Add tap water to the 10 ml mark, cap and shake.
- Add 2 to 3 drops of NITRITE INDICATOR SOLUTION B and mix.
- Add 1 drop of NITRITE TEST SOLUTION A and mix.
- Repeat step 5 until the color changes from red to light gray, green, or blue; record drops.
- Interpret results with Table 11.
- If needed, remove the filler cap and drain some coolant to make space.
- Add the proper amount of SCA and install the filler cap.
Tools required
- 8T-5296 Coolant Conditioner Test Kit Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Do not exceed six percent SCA concentration with coolant/antifreeze
- Do not exceed eight percent SCA concentration with water and SCA
- 25 to 30 drops = recommended SCA concentration
Full service-parts list: Caterpillar 3126B →
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.