Navistar ProStar+, Руководство по эксплуатации и обслуживанию, Страница: 174 / 304

Operation
Double Clutch Procedures
In order to properly upshift or downshift, be sure to do the
following:
• Depress the clutch pedal to disengage the clutch.
• Shift the transmission into Neutral.
• Release the clutch pedal.
• If upshifting, wait until the engine speed matches
the transmission speed of the gear you desire to
shift into.
• If downshifting, accelerate the engine until the
engine speed matches the input speed of the gear
you desire to shift into.
• Depress the clutch pedal immediately and shift into the
desired gear.
• Release the clutch pedal to engage the clutch.
Clutch Brake
NOTE: After engagement of first gear DO NOT use the clutch
brake for upshifting and downshifting. To do so will shorten
the service life of the clutch brake, and gear selection shift
efforts may be increased.
A clutch brake is used to stop transmission input shaft rotation so
that the initial first or reverse gear selection can be accomplished
when the vehicle is at a standstill and the engine is running at
idle speed.
When using the clutch brake, fully depress the clutch pedal and
shift the transmission into either first or reverse gear. If the
transmission does not go into first gear or reverse, tooth butting
may be occurring. Slowly release the clutch pedal while applying
light pressure on the shift lever until the transmission goes into
gear. This will provide for a smooth shift into either first or reverse
gear.
Clutch Precautions
Maintain specified clutch adjustment. Regularly inspect clutch
control linkage for tightness.
When adjustment of the clutch is necessary, it is extremely
important that the work be properly performed; otherwise, early
failure of the clutch will result and a costly clutch overhaul will
be necessary.
To avoid needless delay and expense, allow only competent and
experienced mechanics to perform these operations.
Eaton
®
AutoShift
®
Transmissions
The optional AutoShift ® transmission is a partially automated
transmission that automatically selects and engages the proper
transmission gears. Vehicles are equipped with a clutch pedal
that must be used when starting and stopping the vehicle.
For operating instructions refer to the Transmission Driver
Instruction Manual.
Eaton ® UltraShift ® Transmissions (Optional)
The optional Eaton ® UltraShift ® transmission is an automatic
transmission that can automatically select and engage the
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