SOLENOID 1106465 - Caterpillar

Clean the cooling system and flush the cooling system before the recommended maintenance interval if the following conditions exist:
The engine overheats frequently.
Foaming is observed.
The oil has entered the cooling system and the coolant is contaminated.
The fuel has entered the cooling system and the coolant is contaminated.
Use of commercially available cooling system cleaners may cause damage to cooling system components. Use only cooling system cleaners that are approved for Caterpillar engines.
Note: Inspect the water pump and the water temperature regulator after the cooling system has been drained. This is a good opportunity to replace the water pump, the water temperature regulator and the hoses, if necessary. 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.
Note: The engine may have the ability to auto start. Ensure that the power is isolated before any service or repair is performed.
Stop the engine and allow the engine to cool. Turn the isolator keyswitch to the OFF position.
Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system filler cap. Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on Containing Fluid Spillage.
Open the cooling system drain valves. If the cooling system is not equipped with a drain valve, remove one of the drain plugs. Note: Drain the engine coolant from the following positions. Rear of engine block, Bottom of the heat exchanger and the underside of the exhaust manifold. The exhaust manifold may have two drains. The exhaust manifold that is installed on a engine that has a MCS control panel will only have one drain. Allow the coolant to drain into a suitable container.
Properly dispose of the drained material. Obey local regulations for the disposal of the material.
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.
Flush
Flush the cooling system with clean water in order to remove any debris.
Close the drain valves. 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.
Illustration 1 g01618492
Typical example
Open the vent screw (1) enough to allow the air that is trapped to be purged from the system.
Fill the cooling system with a mixture of clean water and Caterpillar Fast Acting Cooling System Cleaner. Add 0.5 L (1 pint) of cleaner per 15 L (4 US gal) of the cooling system capacity.
Illustration 2 g01618504
Tighten the vent screw securely. Ensure that the coolant level is 25 mm (0.9843 inch) below filler neck (2) on the header tank or the radiator.
Install the cooling system filler cap.