GLOSSARY
Reserve Volume
A volume designed into the deaeration tank to provide a
surplus of coolant to offset losses that might occur.
Stabilization
A condition where under a controlled operating
environment the coolant, oil, air and exhaust temperatures
will not change regardless of the length of time the unit
is run.
Standpipe(s)
Deaeration tube(s) located in the integral radiator
deaeration tank to vent the radiator core of gases. Also
been called "J" tubes.
Suction Fan
A fan that pulls air through the core.
Surge Tank
See "Deaeration Tank".
Total Base Number
Measures an oil's alkalinity and ability to neutralize acid
using a laboratory test (ASTM D 2896 or D 4739). TBN
is important to deposit control in four-stroke, four cycle
diesel engines and to neutralize the effects of high sulfur
fuel in all diesel engines.
Temperature Stability or Drift
The ability of the cooling system to maintain coolant
temperature at light loads and/or engine speed or
long vehicle drift (coasting). An important system
characteristic for good heater operation during cold
ambients.
Top Tank
See "Deaeration Tank"
Top Tank Temperature
See "Engine Coolant Out Temperature".
Water Pump Inlet Restriction
The pressure (suction) at the inlet to the water pump
(pressure cap removed) which represent up-stream
restriction.
G-1
All information subject to change without notice.
(Rev. 03/06)
7SA250 0603
Copyright © 2006 DETROIT DIESEL CORPORATION