Caterpillar 3126B / 3126B Industrial Engine — Cooling System Coolant (ELC) - Change
Maintenance
For the Caterpillar 3126B / 3126B Industrial Engine, from the Caterpillar owner's manual.
Applies to: Caterpillar 3126B, Caterpillar 3126B Industrial Engine engine
Before you start
- Pressurized System: Hot coolant can cause serious burns.
Procedure
- Stop the engine and allow the engine to cool. Loosen the filler cap slowly to relieve pressure. Remove the filler cap.
- Open the drain valve (or remove drain plugs) and allow the coolant to drain.
- Flush the cooling system with clean water to remove debris.
- Close the drain valve; clean and install the drain plugs.
- Fill with clean water. Install the filler cap.
- Start and run the engine at low idle until temperature reaches 49 to 66 °C (120 to 150 °F).
- Stop engine, cool, drain and flush with clean water. Close drain and install drain plugs.
- Fill the cooling system with Extended Life Coolant (ELC). Do not install the filler cap.
- Start and run engine at low idle; increase to high idle; run one minute to purge air. Stop engine.
- Check coolant level to within 13 mm (0.5 inch) below the bottom of the filler pipe.
- Clean and inspect the filler cap gasket; pressure test with a 9S-8140 Pressurizing Pump.
- Start the engine. Inspect the cooling system for leaks and proper operating temperature.
Tools required
- 9S-8140 Pressurizing Pump Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Temperature reaches 49 to 66 °C (120 to 150 °F)
- Fill cooling system no faster than 19 L (5 US gal) per minute
Full service-parts list: Caterpillar 3126B →, Caterpillar 3126B Industrial Engine engine →
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.