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8.17.9 Preheater – Function and leak-tightness check
Preconditions
☑
Preheater is switched on.
WARNING
Coolant is hot and highly pressurized.
Risk of injury! Risk of scalding!
• Allow engine to cool down.
• Wear protective clothing, protective gloves, and safety glasses / facial protection.
Checking operation
Note:
The coolant temperature must correlate to the control range of the thermostat when the preheater is ready
for operation.
1.
Check coolant preheating temperature.
2.
Set the thermostat accordingly if the temperatures are not in the control range.
Checking for leaks
1.
Check leak-tightness at coolant inlet and outlet.
2.
Tighten any leaking unions.
238 | Coolant Circuit, General, High-Temperature Circuit | MS15035/00E 2018-08
TIM-ID: 0000048882 - 001
Summary of Contents for 12V4000M*3 series
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