203g - Emergency Shutdown Systems

Question 1

Why are engine warning and shutdown systems important?

Answer 1

• Shutdown engine to protect the engine and components
• Warning system to protect public
• Advanced warning to operator to then made decisions
• Alert the operator to a problem

203g pg. 2

Question 2

What are four common engine warning and shutdown systems?

Answer 2

• Low oil pressure
• High coolant temperature
• Low coolant level
• Engine overspeed

203g pg. 4

Question 3

As part of a mechanical coolant temperature monitoring system, where would the sensor bulb be best located?

Answer 3

Just below the thermostat housing as this is where the hottest coolant would be located.

203g pg. 9

Question 4

When replacing components in an electrical coolant temperature gauge system, what two precautions should be made?

Answer 4

• Match the sending unit with the gauge
• Ensure proper routing of the signal wire so it doesn’t get damaged

203g pg. 9

Question 5

Multiple warning and shutdown systems can be installed on an engine. How should they be wired to ensure adequate protection if one or more systems fail in operation?

Answer 5

Systems should be wired independently

203g pg. 11

Question 6

A genset may be equipped with engine warning and shutdown systems. What would a high & low speed sensor system protect?

Answer 6

The generator’s external loads.

(Overspeed sensor would be installed to protect the engine)

203g pg. 11