Kohler — Procedure to Refill Cooling System
Maintenance
From a Kohler operator's manual covering: 125REZGT, 30--125REZGT, 30REZG, 30REZGT, 50REZG, 70REZGT. Check it applies to your exact model before use.
Applies to: Kohler 125REZGT, Kohler 30REZG, Kohler 30REZGT, Kohler 50REZG, Kohler 70REZGT
Before you start
- Do not add coolant to a hot engine; adding coolant to a hot engine can crack the cylinder block or cylinder head.
Procedure
- Remove the pressure cap.
- Close the radiator and/or engine block coolant drain valve(s) and tighten the cooling system hose clamps.
- Open the air-bleed petcocks, if equipped; close when coolant begins to flow from them.
- Add coolant additives or water pump lubricants according to engine manufacturer recommendations.
- Fill the cooling system with the recommended coolant/antifreeze mixture.
- Replace the pressure cap.
- Fill the coolant recovery tank (if equipped) to the low mark.
- Operate generator set until the thermostat opens.
- Stop the engine and allow it to cool; check and repair any coolant leaks.
- Remove the pressure cap and add coolant to just below the overflow tube opening of the filler neck.
- Replace the pressure cap.
- Maintain the coolant level in the coolant recovery tank between the high and low marks.
Specs & values
- Check the coolant level after each operation until it stabilizes
Full service-parts list: Kohler 125REZGT →, Kohler 30REZG →, Kohler 30REZGT →, Kohler 50REZG →, Kohler 70REZGT →
Source: Kohler operator'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.