Detroit Diesel MBE 4000 Service Manual page 376

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To avoid injury from hot surfaces, wear protective gloves,

or allow engine to cool before removing any component.

[a] Measure the water temperature. As the temperature climbs to around 165 F (75 C),

slow the rate of heating down to about 2 to 3 F (1 to 2 C) per minute.

[b] In about five minutes, the main valve should begin to open.

4. Continue to heat the water at this rate for about six to eight minutes until it reaches the

opening temperature of the main valve. If the main valve is not completely open, replace

the thermostat. See Figure 4-16.

1. Thermostat

2. Main Valve

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PERSONAL INJURY

Thermostat Lift

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3. Short Circuit Valve

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All information subject to change without notice.

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