Vacuum-type Coolant Refill Tool for Heavy Duty Vehicles

Changing the coolant on a commercial truck is a crucial part of maintaining the vehicle's engine and preventing overheating. Here’s a step-by-step guide:

 1. Preparation:

   - Gather Tools and Materials:

     - Coolant (appropriate type for your truck)

     - Drain pan

     - Funnel

     - Wrenches or pliers

     - Gloves and safety glasses

     - A coolant tester (optional)

     - A shop vacuum (if needed)

   - Safety Precautions:

     - Ensure the engine is cool before starting.

     - Park the truck on a level surface.

     - Engage the parking brake and use wheel chocks for safety.

 2. Draining the Old Coolant:

   - Locate the Drain Plug: 

     - The radiator drain plug is typically located at the bottom of the radiator.

     - If your truck has a petcock valve, it can be turned to start the drainage.

   - Drain the Coolant:

     - Place the drain pan under the radiator.

     - Open the drain plug or petcock valve and allow the coolant to flow into the pan.

     - Some trucks may also have a drain plug on the engine block that needs to be removed to fully drain the coolant.

   - Flush the System (Optional):

     - If the coolant is dirty or contaminated, consider flushing the system with water or a radiator flush solution. Please refer to Cosda’s SD-1290 Coolant Flush Tool

     - Close the drain plug, fill the system with clean water, and run the engine for a few minutes before draining again.

 3. Refilling with New Coolant:

   - Close Drain Plugs:

     - Ensure all drain plugs are securely tightened.

   - Mix Coolant:

     - If using concentrated coolant, mix it with distilled water according to the manufacturer’s specifications (usually a 50/50 mix).

   - Refill the System:

     - Use Cosda’s SD-1014A. Connect the conical adapter to the filler neck, and turn on the air valve to create a vacuum in the cooling system. Put the coolant hose in the mixed coolant and keep the hose end submerged. Once the vacuum is well created in the cooling system, turn on the coolant valve and the coolant will be pushed into the cooling system by atmospheric pressure.

 4. Check for Leaks:

   - Inspect for Leaks:

     - Once the system is full, check around the drain plugs and hoses for any signs of leaks.

   - Replace the Radiator Cap:

     - After ensuring there are no leaks, securely replace the radiator cap.

 5. Final Check:

   - Test the Coolant Level:

     - After the engine has cooled, recheck the coolant level and add more if necessary.

   - Check Coolant Concentration (Optional):

     - Use a coolant tester to ensure the correct freeze protection level, especially if your truck operates in extreme temperatures.

 6. Dispose of Old Coolant:

   - Proper Disposal:

     - Coolant is toxic and should be disposed of properly at a recycling facility or automotive shop that accepts hazardous waste.

Regular coolant changes are essential for keeping a commercial truck's engine running smoothly and preventing costly repairs. Depending on the truck and the type of coolant, the change interval may vary, so refer to the truck’s manual for specific guidelines.