Perkins 1106 — Cooling System Coolant (Commercial Heavy-Duty) - Change

Maintenance

For the Perkins 1106, from the Perkins owner's manual.

Applies to: Perkins 1106

Procedure

1. Stop the engine, allow it to cool, loosen and remove the cooling system filler cap.
2. Open the drain cock or remove the drain plug on the engine and on the radiator. Allow the coolant to drain.
3. Flush the cooling system with clean water to remove debris.
4. Close the drain cocks or install the drain plugs.
5. Fill with clean water, install the filler cap, and run the engine at low idle until 49 to 66 C (120 to 150 F).
6. Stop the engine and allow to cool; drain and flush again.
7. Fill with Commercial Heavy-Duty Coolant and add Supplemental Coolant Additive. Do not install the filler cap.
8. Run at low idle, then high idle for one minute to purge air. Stop the engine.
9. Check the coolant level; maintain within 13 mm (0.5 inch) below the bottom of the filler pipe.
10. Clean and inspect the filler cap gasket; pressure test or replace the cap as needed.
11. Start the engine and inspect for leaks and correct operating temperature.

Full service-parts list: Perkins 1106 →

Source: Perkins 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.

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