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Coolant Replacement Procedure
Follow these key steps to replace coolant in a storage tank, ensuring safety and proper system function.
Always consult manufacturer guidelines for specific requirements.
1
Preparation
Safety First: Wear protective gloves, goggles, and clothing. Ensure proper ventilation in enclosed spaces.
- Tools/Materials: Gather funnel, wrench, drain pan, refractometer, replacement coolant, and rags
- Locate Components: Identify drain valve, fill port, and any sensors
2
System Shutdown
Power off connected machinery and allow hot coolant to cool completely to avoid burns or thermal shock.
3
Drain Old Coolant
- Place drain pan beneath the tank's drain valve
- Open valve slowly to release coolant (relieve pressure first in closed systems)
- Inspect drained coolant for contaminants (rust, oil, debris)
4
Tank Cleaning
For heavily contaminated systems, flush with clean water or manufacturer-recommended cleaner. Ensure no residue remains.
5
Component Inspection
- Check tank for corrosion, cracks, or leaks
- Examine seals, gaskets, and valves for wear
- Inspect coolant lines for blockages
6
Add Fresh Coolant
- Use funnel to pour new coolant following manufacturer's guidelines
- Verify mixture with refractometer
- Leave space for expansion (up to "MAX" mark)
7
System Bleeding
In closed-loop systems, open bleed valves or run system with fill cap slightly open to release air pockets.
8
Coolant Disposal
⚠️ Important
Old coolant is hazardous waste. Collect in sealed containers and dispose at certified recycling facilities. Never pour down drains.
9
Final Checks
- Recheck all connections for tightness
- Record details in maintenance log
- Monitor system during initial operation