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 />
Refer to the Engine Operation and Maintenance manual<br />
for optimum engine rpm.<br />
• If the engine rpm moves beyond the maximum governed<br />
speed, indicating an overspeed condition,<br />
apply the service brake or shift to a higher gear to<br />
bring engine rpm within the optimum speed range.<br />
• When driving downhill: shift to a lower gear, use the<br />
engine brake (if so equipped), and use the service<br />
brake, keeping the engine speed below 2,100 rpm.<br />
When the engine speed reaches its maximum governed<br />
speed, the injection pump governor cuts off fuel to the<br />
engine. However, the governor has no control over the<br />
engine rpm when it is being driven by the vehicle's transmission,<br />
for example, on steep downgrades. Apply service<br />
brakes or shift to a higher gear.<br />
Fuel economy and engine performance are also directly<br />
related to driving habits:<br />
• The best results in trip time and fuel economy are<br />
obtained while driving the vehicle at a steady speed.<br />
ENGINE OVERSPEED<br />
• Shift into higher or lower gears (or apply the service<br />
brake) to keep engine rpm near the lower end of the<br />
optimum operating range.<br />
• Avoid rapid acceleration and braking.<br />
WARNING! Do not exceed the specified load<br />
rating. Overloading can result in loss of vehicle<br />
control and an accident causing death or<br />
personal injury, either by causing component<br />
failures or by affecting vehicle handling.<br />
Exceeding load ratings can also shorten the<br />
service life of the vehicle.<br />
• The components of your vehicle are<br />
designed to provide satisfactory service if<br />
the vehicle is not loaded in excess of either<br />
the gross vehicle weight rating (GVWR), or<br />
the maximum front and rear gross axle<br />
weight ratings (GAWRs). (Axle weight ratings<br />
are listed on the driver's door edge.)<br />
NOTE: For your safety and the safety of others,<br />
follow routine and periodic maintenance schedules<br />
for all components on your vehicle. See<br />
Table 2, “Maintenance Schedule,” Page 152<br />
<strong>Regional</strong> <strong>Haul</strong> (R05/10) Y53-6033 – 129 –