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8.15.4 Engine coolant – Draining
Preconditions
☑ Engine is stopped and starting disabled.
DANGER
Falling from great heights.
Risk of serious injury – danger to life!
• When working high on the equipment, always use suitable ladders or work platforms.
• Use personal protective equipment.
WARNING
Coolant is hot and under pressure.
Risk of injury and scalding!
• Let the engine cool down.
• Wear protective clothing, gloves, and goggles / safety mask.
WARNING
Coolant contains antifreeze and is toxic.
Risk of poisoning and slipping!
• Avoid contact with eyes and skin.
• Do not inhale vapors or mist, wear breathing protection.
• Do not eat, drink, smoke when working with antifreeze.
• Wear protective clothing, protective gloves and goggles/safety mask.
• Wipe up escaped/spilled coolant immediately.
Preparatory steps
1.
Provide a suitable container to catch the coolant.
2.
Switch off preheater.
Draining engine coolant
1.
Turn valve cover of coolant expansion tank
counterclockwise until the first stop and al-
low pressure to escape.
2.
Continue to turn valve cover counterclock-
wise and remove.
3.
Draw off separated corrosion inhibitor oil in
expansion tank through the filler neck.
4.
Open drain valves and/or drain plugs and
drain coolant at the following points:
• At preheater
• Thermostat housing (1)
• Twin elbow (2)
• At elbow (4) of HT coolant pump
• Crankcase (3), left and right side
Final steps
1.
Tighten shutoff cocks (3) and (4) with torque wrench to specified tightening torque.
Name
Spindle
296 | Coolant Circuit, General, High-Temperature Circuit | MS15038/01E 2018-11
Size
Type
11 A/F
Tightening torque
Lubricant
Value/Standard
12 Nm
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