Zetor CRYSTAL HD 150, Operator'S Manual

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Replacing coolant
C18N013
Follow these steps:
1 - Open the heating cock (B) and release the overpressure plug (A) on the leveling container.
2 - Drain coolant from the radiator. The drain plug (C) is accessible after the bonnet has been removed.
3 - Drain the coolant from the engine block. The drain plug (D) is located on the left side of the engine and is
accessible after the bonnet has been removed.
4 - unscrew the vent plugs (E) and (F) and drain the remaining coolant from the engine block through the
drain plug (D). The stopper (E) is located on the rear of the engine head and is accessible after removing the
right side of the bonnet. The stopper (F) is located on the EGR valve hub behind the left side of the bonnet.
5 - Close the drain plugs (C) and (D) after draining the coolant (leave the heater cock and plugs (E) and (F)
open).
6 - Start filling the coolant into the neck of the buffer tank (A) until the coolant starts to escape through the
opening of the venting plug (E). When the coolant without air bubbles begins to leak through the hole, screw
in and tighten the plug (E).
7 - Continue filling the coolant until the coolant starts to leak through the vent (F). When the coolant without
air bubbles starts to escape through the hole, screw in and tighten the plug (F).
8 - Refill the cooling system with a coolant through the neck in the buffer container and close with an
overpressure plug.
9 - Start the engine and run it for about 1 minute.
10 - Refill the coolant level in the buffer tank (A) to the MAX mark.
11 - Close the container with an overpressure plug.
When filling the engine cooling system, always use this procedure to bleed the engine cooling
system and the EGR valve via the vent plugs (E) and (F), otherwise the EGR valve may be damaged.
Always use the prescribed coolant to fill the engine cooling system. Never fill the cooling
system with water. Using a different coolant may cause engine damage.
MAINTENANCE INSTRUCTIONS
204