21736273 Volvo.Penta Hub

Drain
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Stop the engine and allow the engine to cool. Loosen the cooling system filler cap slowly to relieve any pressure. Remove the cooling system filler cap.
Illustration 1 g03890108
Typical example
Remove drain plug (1) on the engine. Open the drain cock or remove the drain plug on the radiator.Allow the coolant to drain.
Refer to OEM for the drain location for your application.
Dispose of used engine coolant properly or recycle. Various methods have been proposed to reclaim used coolant for reuse in engine cooling systems. The full distillation procedure is the only method acceptable by Caterpillar to reclaim the used coolant.
For information regarding the disposal and the recycling of used coolant, consult your Cat dealer or consult Dealer Service Tools.Drain Plugs for Factory Installed Radiators
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Typical example
(2) C1.7 Three cylinder radiator drain plug
(3) C2.2 Four cylinder turbocharged engine radiator drain plug
(4) C2.2 Four cylinder turbocharged aftercooled engine drain plug front of radiator
Tighten drain plug (2) to a torque of 4 N m (35.4 lb in)
Tighten drain plug (3) to a torque of 4 N m (35.4 lb in)
Tighten drain plug (4) to a torque of 6 N m (53. lb in)Flush
Flush the cooling system with clean water to remove any debris.
Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. Refer to Torque Specifications, SENR3130 for more information on the correct torques.
Do not fill the cooling system faster than 5 L (1.3 US gal) per minute to avoid air locks.Cooling system air locks may result in engine damage.
Fill the cooling system with clean water. Install the cooling system filler cap.
Start and run the engine at low idle until the temperature reaches 49 °C to 66 °C (120 °F to 150 °F).
Stop the engine and allow the engine to cool. Loosen the cooling system filler cap slowly to relieve any pressure. Remove the cooling system filler cap. Open the drain valve (if equipped) or remove the cooling system drain plugs. Allow the water to drain. Flush the cooling system with clean water. Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. Refer to Torque Specifications, SENR3130 for more information on the correct torques.Fill
Do not fill the cooling system faster than 5 L (1.3 US gal) per minute to avoid air locks.Cooling system air locks may result in engine damage.
Fill the cooling system with Extended Life Coolant (ELC). Refer to this Operation and Maintenance Manual, "Refill Capacities and Recommendations" topic (Maintenance Section) for more information on cooling system specifications. Do not install the cooling system filler cap.
Start and run the engine at low idle. Increase the engine rpm to high idle. Run the engine at high idle for 1 minute to purge the air from the cavities of the engine block. Stop the engine.
Maintain the coolant level at the maximum mark that is correct for your application. For more information, refer to this Operation and Maintenance Manual, "Coolant Level - Check".
Illustration 3 g06165279
Typical example
Clean the cooling system filler cap and check the condition of the filler cap gasket (2). Replace the cooling system filler cap if the filler cap gasket (2) and sealing surface (1) are damaged. If the cooling system filler cap is not damaged, perform a pressure test on the filler cap.
Cooling system filler cap pressure for three cylinder engine 95 kPa (13.7 psi)
Cooling system filler cap pressure for four cylinder engine 110 kPa (15.9 psi)If the cooling system filler cap passes the pressure test check, install the filler cap. If required install new cooling system filler cap.
Start the engine. Inspect the cooling system for leaks and for proper operating temperature.