Changes

Proper operation and maintenance are key factors in determining the useful life and operating economy of a diesel engine. Follow these directions for trouble-free, economical operation.  

Proper operation and maintenance are key factors in determining the useful life and operating economy of a diesel engine. Follow these directions for trouble-free, economical operation.  

==== To Start Engine ====

====To Start Engine====

Detroit Diesel Engines will start at temperatures above 0 degrees F ( - 12 degrees C) without using a starting aid. However, for colder temperatures it may be necessary to activate the engine block heater (120 volt ac-operated) to heat the crankcase oil. The ENGINE BLOCK HEATER is controlled by the battery heater breaker. Remember to set the breaker OFF when the heater is no longer needed.  

Detroit Diesel Engines will start at temperatures above 0 degrees F ( - 12 degrees C) without using a starting aid. However, for colder temperatures it may be necessary to activate the engine block heater (120 volt ac-operated) to heat the crankcase oil. The ENGINE BLOCK HEATER is controlled by the battery heater breaker. Remember to set the breaker OFF when the heater is no longer needed.  

====Driving Tips====

====Driving Tips====

====='''Accelerator Control'''=====

=====Accelerator Control=====

Foot pressure on the accelerator pedal influences the automatic upshifting or downshifting within each driving range . When the pedal is fully depressed against the floor pedal stop , the transmission automatically upshifts near the recommended governed speed of the engine . A partially depressed position of the pedal causes the upshifts to occur sooner at a lower engine speed. This throttle-modulation method provides the accurate shift spacing and control necessary for maximum performance.

Foot pressure on the accelerator pedal influences the automatic upshifting or downshifting within each driving range . When the pedal is fully depressed against the floor pedal stop , the transmission automatically upshifts near the recommended governed speed of the engine . A partially depressed position of the pedal causes the upshifts to occur sooner at a lower engine speed. This throttle-modulation method provides the accurate shift spacing and control necessary for maximum performance.

====='''Downshift Control'''=====

=====Downshift Control=====

The transmission can be downshifted or upshifted , even at full throttle, and, although there is no speed limitation on upshifting , there is a limitation on downshifting and reverse . Good driving practices indicate that downshifting should be avoided when the vehicle is over the maximum speed attainable in the next lower gear . Allison transmissions incorporate downshift inhibitors to prevent harmful shifts when the vehicle is traveling too fast for the next lower gear. If downshifts are attempted at excessive speeds , the inhibitors prevent the selected downshift until the vehicle reaches an acceptable speed.  

The transmission can be downshifted or upshifted , even at full throttle, and, although there is no speed limitation on upshifting , there is a limitation on downshifting and reverse . Good driving practices indicate that downshifting should be avoided when the vehicle is over the maximum speed attainable in the next lower gear . Allison transmissions incorporate downshift inhibitors to prevent harmful shifts when the vehicle is traveling too fast for the next lower gear. If downshifts are attempted at excessive speeds , the inhibitors prevent the selected downshift until the vehicle reaches an acceptable speed.  

====='''Transmission Oil Temperature'''=====

=====Transmission Oil Temperature=====

Extended operation at low vehicle speeds, with the engine at full throttle , can cause excessively high temperature in the transmission . These temperatures may tend to overheat the engine cooling system as well as cause possible damage to the transmission. If excessive temperature is indicated by the engine coolant temperature gauge, stop the vehicle and determine the cause. If the cooling system appears to be functioning properly, the transmission is probably overheated. Shift to N and accelerate the engine to 1,200 to 1,500 RPM . This should reduce the oil sump temperature to operating level within a short time. If high temperatures persist , stop the engine and have the overheating condition investigated by service personnel.  

Extended operation at low vehicle speeds, with the engine at full throttle , can cause excessively high temperature in the transmission . These temperatures may tend to overheat the engine cooling system as well as cause possible damage to the transmission. If excessive temperature is indicated by the engine coolant temperature gauge, stop the vehicle and determine the cause. If the cooling system appears to be functioning properly, the transmission is probably overheated. Shift to N and accelerate the engine to 1,200 to 1,500 RPM . This should reduce the oil sump temperature to operating level within a short time. If high temperatures persist , stop the engine and have the overheating condition investigated by service personnel.  

The motorhome is optionally equipped with, four heavy-duty leveling jacks; one at each corner of the chassis. Because the rear leveling jacks must extend or retract a greater distance than the front jacks, their operating cycle takes appreciably longer. Overall system operation is controlled and monitored at the leveling jack controls, while each jack is independently operated by one of four respective EXTEND-RETRACT levers located on the floor to the left of the driver, figure 2-20. A dash indicator and a buzzer (when ignition switch is on) provide visual and audible signals to show that the associated leveling jacks are not stowed to a safe travel position.

The motorhome is optionally equipped with, four heavy-duty leveling jacks; one at each corner of the chassis. Because the rear leveling jacks must extend or retract a greater distance than the front jacks, their operating cycle takes appreciably longer. Overall system operation is controlled and monitored at the leveling jack controls, while each jack is independently operated by one of four respective EXTEND-RETRACT levers located on the floor to the left of the driver, figure 2-20. A dash indicator and a buzzer (when ignition switch is on) provide visual and audible signals to show that the associated leveling jacks are not stowed to a safe travel position.

'''''Caution Severe injury or death may result. DO NOT use the leveling system for changing tires or working under the vehicle. Keep the rear wheels in firm contact with the ground with the parking brake set. With the leveling jacks extended, there is a possibility the vehicle may move either toward the front or the rear.'''''  

'''''Caution Severe injury or death may result. DO NOT use the leveling system for changing tires or working under the vehicle. Keep the rear wheels in firm contact with the ground with the parking brake set. With the leveling jacks extended, there is a possibility the vehicle may move either toward the front or the rear.'''''

 

 

'''Operating the leveling jacks'''

'''Note''' 12 Volt master switch must be on to operate leveling jacks.  

'''Note''' 12 Volt master switch must be on to operate leveling jacks.