Detroit Diesel MBE 4000 Service Manual page 556

13.1 SCHEDULED INTERVALS
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To avoid scalding from the expulsion of hot coolant, never
remove the cooling system pressure cap while the engine
is at operating temperature.
clothing (face shield, rubber gloves, apron, and boots).
Remove the cap slowly to relieve pressure.
1. Dip the test strip into the coolant for one second, then remove it. Shake the strip
vigorously to remove excess liquid.
2. Immediately compare the end pad to the color chart on the container to determine the
glycol concentration.
3. Sixty seconds (one minute) after dipping, compare the nitrite pad to the color chart on the
container to determine the nitrite concentration.
4. If the additive indicator (middle pad) shows any color change, this indicates the presence
of an unauthorized inhibitor.
5. If any problems exist, change the coolant.
6. After each use, replace and tighten the cap on the test strip container. Discard any test
strips that have turned light pink or tan in color.
7. Close and tighten the cap on the surge tank.
13.1.8 Coolant Flushing and Changing
Flush and change the coolant as follows:
To avoid scalding from the expulsion of hot coolant, never
remove the cooling system pressure cap while the engine
is at operating temperature.
clothing (face shield, rubber gloves, apron, and boots).
Remove the cap slowly to relieve pressure.
1. Open the cap on the surge tank slowly, to allow excess pressure to escape. Set the cap
aside.
2. Open the water regulating valve for the heating system.
13-22
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HOT COOLANT
Wear adequate protective
HOT COOLANT
Wear adequate protective
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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All information subject to change without notice.
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