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
FIFTH WHEEL Driving with Deflated Air Springs Vehicles with the air suspension (option): If an air spring ruptures, there will be enough air pressure to drive the vehicle to a safe stop off the highway to investigate the problem. WARNING! Do not continue to drive with ruptured air springs. The air loss can cause the spring brakes to apply allowing your brakes to drag and burn up the linings, which could lead to an accident causing death or personal injury. Do not continue to operate the vehicle in this condition. To get to a repair facility, do the following: 1. Remove the height control link connected to the axle and to the suspension air valve control arm. This will cause the air valve control arm to center in the closed position. 2. The air system can then be pumped up to normal pressure for continued operation. Fifth Wheel STARTING AND OPERATING THE VEHICLE WARNING! Low air pressure could make brakes unsafe for driving by not providing sufficient air brake application pressure in an emergency, which could lead to an accident resulting in death or personal injury. Before driving the vehicle, make sure the air pressure pumps up to over 100 psi for normal brake operation. If it does not reach 100 psi, do not try to move the vehicle. CAUTION: Do not operate a vehicle with air suspension bags either over- or underinflated. This could cause damage to driveline components. If you must drive under such conditions, do not exceed 5 mph (8 km/ h). The following applies to tractor configurations: WARNING! Ensure that all fifth wheel maintenance, adjustments, and rebuilding are done only by a qualified mechanic. An improperly maintained fifth wheel can cause a trailer to separate from a tractor. This could lead to an accident causing death, personal injury and damage to property. – 134 – Y53-6033 Regional Haul (R05/10)
STARTING AND OPERATING THE VEHICLE FIFTH WHEEL Your Regional Haul vehicle may be equipped with either a fixed or an air-controlled sliding fifth wheel. Either type should self-lock when a trailer king pin trips the locking dogs as the tractor is backed under a trailer. Fifth Wheel Jaw Lock To unlock the fifth wheel lock: • Pull out on the lever (usually located on the left-hand side of the fifth wheel) until it remains in an overcenter position. Hook–Up: • After connecting your tractor to the trailer, always inspect the jaws to be sure they have locked on the kingpin before driving. Fifth Wheel Slide Switch FIFTH WHEEL Air–Controlled Sliding Fifth Wheel Vehicles having an air-controlled sliding fifth wheel have a fifth wheel slider lock controlled by a switch on the accessory switch panel. To operate this type of lock, move the switch to the appropriate position. By placing the switch in the UNLOCK position, you can slide the fifth wheel to various positions to adjust weight distribution. There is a guard on this switch to protect you against accidentally activating or releasing the lock. Regional Haul (R05/10) Y53-6033 – 135 –
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STARTING AND OPERATING THE VEHICLE<br />
FIFTH WHEEL<br />
Your <strong>Regional</strong> <strong>Haul</strong> vehicle may be equipped with either a<br />
fixed or an air-controlled sliding fifth wheel. Either type<br />
should self-lock when a trailer king pin trips the locking<br />
dogs as the tractor is backed under a trailer.<br />
Fifth Wheel Jaw Lock<br />
To unlock the fifth wheel lock:<br />
• Pull out on the lever (usually located on the left-hand<br />
side of the fifth wheel) until it remains in an overcenter<br />
position.<br />
Hook–Up:<br />
• After connecting your tractor to the trailer, always<br />
inspect the jaws to be sure they have locked on the<br />
kingpin before driving.<br />
Fifth Wheel Slide Switch<br />
FIFTH WHEEL<br />
Air–Controlled Sliding Fifth Wheel<br />
Vehicles having an air-controlled sliding fifth wheel have a<br />
fifth wheel slider lock controlled by a switch on the accessory<br />
switch panel. To operate this type of lock, move the<br />
switch to the appropriate position. By placing the switch in<br />
the UNLOCK position, you can slide the fifth wheel to various<br />
positions to adjust weight distribution. There is a<br />
guard on this switch to protect you against accidentally<br />
activating or releasing the lock.<br />
<strong>Regional</strong> <strong>Haul</strong> (R05/10) Y53-6033 – 135 –
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