Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
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STARTING AND OPERATING THE VEHICLE<br />
2. Fully depress the clutch pedal until the clutch brake<br />
makes contact (see page 98). The contact will occur<br />
at about 1 inch or less from the floorboard.<br />
• The total stroke of the clutch pedal is about 10<br />
inches. The first 1 3/4 to 2 inches is free travel. After<br />
the free travel comes the release stroke, which is the<br />
part that fully releases the clutch. The last inch<br />
engages the clutch brake.<br />
• Always start out in a low gear. Starting in a higher<br />
gear, even with a light load, will cause a very jumpy<br />
start and excessive wear.<br />
CAUTION: Always use first gear or a low<br />
speed range to start the vehicle in motion. The<br />
use of a higher gear or speed range forces<br />
undue strain on the engine, clutch, other<br />
transmission components, and may cause<br />
damage.<br />
3. Evaluate the road surface conditions and terrain your<br />
vehicle is on. Select a gear low enough to let your<br />
vehicle start forward with the throttle at idle.<br />
4. Push the parking brake valve handle (Yellow) against<br />
the dash panel to release the brakes.<br />
PUTTING THE VEHICLE IN MOTION<br />
5. Release the clutch pedal, then gradually accelerate to<br />
permit smooth starting,<br />
6. Do not allow your vehicle to roll (even a little) in the<br />
opposite direction during clutch engagement. If you<br />
need to start up on an incline, apply your service<br />
brakes before you release the parking brake. Then<br />
release your service brakes as you engage the clutch<br />
and apply throttle.<br />
For further instructions on operating your transmission,<br />
see the transmission manufacturer's manual that is<br />
included with your vehicle.<br />
If you have a misaligned gear condition in your vehicle's<br />
transmission and cannot start, gradually release the<br />
clutch, allowing the drive gear teeth to line up properly.<br />
Then the drive gear can roll enough to allow the teeth to<br />
line up properly and complete the shift.<br />
The best engine performance and maximum economy is<br />
obtained if gears are properly selected. This efficiency is<br />
achieved by always selecting gears within optimum<br />
engine rpm, which is where maximum torque and power<br />
are obtained. For further information, see “More Driving<br />
Tips and Techniques” on page 127.<br />
<strong>Regional</strong> <strong>Haul</strong> (R05/10) Y53-6033 – 97 –
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