Monitoring the Oil Pressure
When the engine has reached its normal operating temperature, the engine oil
pressure must not drop below the normal operating range.
If oil pressure drops below the normal operating range or if an oil pressure warning
indicator becomes active, stop the engine and determine the cause. It may be
necessary to take the vehicle to an authorized Detroit™ service outlet.
Monitoring the Instrument Panel
During engine operation, monitor the instrument panel and instrument panel
indicators for any warnings or messages concerning the vehicle's operating status.
The instrument panel will display engine speed, vehicle speed, as well as alert the
driver of various temperatures, pressures and other vehicle conditions. For more
information, Refer to section "Instrument Panel Indicators". If the instrument panel
indicates a malfunction, the operator is responsible to take action to avoid
equipment damage.
Monitoring the Battery Charging System
The battery charge indicator must turn off once the engine starts. If the indicator
comes on while the engine is running, do the following:
1. Shut down the engine.
2. Have the charging system and batteries tested. Authorized Detroit™ service
outlets are properly equipped for these types of service
Shifting a Manual Transmission
Shifting a Manual Transmission
Depending on the transmission model, the gear split may vary from 400 to 500
rpm. The electronic governor provides almost no overrun capability and if the
transmission is downshifted too early, a temporary loss of pulling power will be
experienced until the engine speed falls below rated speed.
In general, when using a 7- or 9-speed transmission, the operator should always
downshift between 1150 and 1250 rpm for the DD13 and between 1000 and 1100
rpm for the DD15. This is true even on steep grades with heavy loads. When using
an 18-, 15-, or 13-speed transmission, the operator will need to downshift at an rpm
that allows "less than rated" rpm before throttle application in the next gear down.
The operator may want to limit engine speed to 1900 rpm in all gears as fuel
economy is not as efficient above 1800 rpm.
Engine Operation
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All information subject to change without notice.
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