Engine Manual

TP-7095 4/18 41
3.7 Cooling System
WARNING
Hot coolant and steam.
Can cause severe injury or death.
Before removing the pressure cap, stop the engine and allow it to cool. Then loosen the
pressure cap to relieve pressure.
3.7.1 Check Coolant Level and Condition
The engine coolant level should be checked daily before starting the engine. Insufficient coolant will cause the engine to
overheat.
1. Open the radiator cap slowly in order to release the pressure in the system.
2. Maintain the coolant level in the coolant overflow bottle between the High and Low markings. See “Coolant
Recommendations.”
Note:
Periodically check the coolant level by removing the radiator’s pressure cap. Do not rely solely on the level in the coolant
overflow bottle.
3. Install and tighten the radiator cap.
Check coolant condition:
Engine coolant should be uniformly colored and transparent. Replace the coolant if it is dirty, discolored, or fouled with oil or rust
particles.
Rusty coolant may indicate corrosion inside the radiator. Oil in the coolant indicates a leak somewhere in the lubrication system.
Contact a Kohler authorized distributor/dealer if either of these conditions exist.
3.7.2 Check Hoses and Clamps
Check the condition of the coolant system hoses and clamps every 10 hours of operation.
Hoses:
• Inspect the hoses for cracks, abrasions, cuts, bulges, swollen ends, or leaks.
• Squeeze the hoses. They should yield slightly to moderate pressure and not feel too hard, too soft, or spongy.
• Replace faulty hoses before operating the engine.
Clamps:
• Verify that all clamps are in place.
• Adjust and tighten clamps as needed.
3.7.3 Draining and Replacing the Coolant
There are no coolant plugs or drainage valves on the engine. To drain and replace the coolant, refer to the radiator procedures
in the Operation Manual for the equipment using this engine.