Ford F 750 Owners Manual
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Page 131
Normal Driving Position Push in both knobs (A and B) to supply air to both trailer and tractor spring brakes, releasing all brakes. System Park With both knobs (A and B) pushed in (normal driving position), the parking brakes for both the tractor and trailer can be applied by pulling the parking brake knob (B) out, exhausting air from the tractor spring brakes, simultaneously causing the trailer air supply valve to pop out, applying the trailer brakes. 128 F-650/750 (TBC) , enUSA, First Printing...
Page 132
Trailer Charge If both knobs (A and B) are out, and you want to recharge the trailer while leaving the tractor spring brakes applied, the trailer air supply (A) can be pushed in to recharge the trailer air supply line. You can also use this mode to park a combination vehicle with tractor spring brakes. Automatic Application If both knobs (A and B) are pushed in and the brake system air pressure is reduced to approximately 35 psi (249 kPa), the trailer air supply (A) knob automatically pops out applying...
Page 133
PRINCIPLE OF OPERATION The traction control system helps avoid drive wheel spin and loss of traction. If your vehicle begins to slide, the system applies the brakes to individual wheels and, when needed, reduces engine power at the same time. If the wheels spin when accelerating on slippery or loose surfaces, the system reduces engine power in order to increase traction. Note: The system does not apply the brakes when vehicle speed is above 25 mph (40 km/h). USING TRACTION CONTROL - VEHICLES WITH: AIR...
Page 134
Press the switch again to enable the traction control system. System Indicator Light Note: If the traction control light does not flash during a traction control event or stays illuminated, the system is not functioning properly. Take your vehicle to an authorized dealer for service. During traction control operation, the traction control light flashes rapidly and the engine does not rev-up when you press further on the accelerator. This is normal and is no reason for concern. When traction control is...
Page 135
PRINCIPLE OF OPERATION Cruise control lets you maintain a set speed without keeping your foot on the accelerator pedal. You can use cruise control when your vehicle speed is greater than 20 mph (30 km/h). USING CRUISE CONTROL WARNINGS Do not use cruise control on winding roads, in heavy traffic or when the road surface is slippery. This could result in loss of vehicle control, serious injury or death. When you are going downhill, your vehicle speed may increase above the set speed. The system will not...
Page 136
Changing the Set Speed • Press and release SET+ or SET-. When You select km/h as the display measurement in the information display, the set speed changes in approximately 2 km/h increments. When you select mph as the display measurement in the information display, the set speed changes in approximately 1 mph increments. • Press the accelerator or brake pedal until you reach the desired speed. Press and release SET+ or SET-. • Press and hold SET+ or SET-. Release the control when you reach the desired...
Page 137
STEERING To help prevent damage to the power steering system: • Never hold the steering wheel at its furthest turning points (until it stops) for more than three to five seconds when the engine is running. • Do not operate the vehicle with a low power steering pump fluid level (below the MIN mark on the reservoir). • Some noise is normal during operation. If excessive, check for low power steering pump fluid level before seeking service by your dealer. • Heavy or uneven efforts may be caused by low power...
Page 138
LOAD LIMIT WARNINGS Do not exceed the GVWR or the GAWR specified on the Safety Compliance Certification Label. Do not use replacement tires with lower load carrying capacities than the original tires because they may lower the vehicle's GVWR and GAWR limitations. Replacement tires with a higher limit than the originals do not increase the GVWR and GAWR limitations. Exceeding any vehicle weight rating limitation could result in serious damage to the vehicle and/or personal injury. Every vehicle...
Page 139
AIR SUSPENSION (If Equipped) Note: Do not operate your vehicle without air in the suspension springs. Operating your vehicle without air in the suspension springs damages the suspension, degrades ride performance and may cause property damage. The air suspension system automatically adjusts to different loads to maintain a constant frame height, allows for ease of vehicle loading, provides improved vehicle ride, and increased driver comfort. Air Suspension Dump Button Note: The suspension dumps air when...
Page 140
We do not recommend performing, or approve of, suspension conversions. However, we understand that, on occasion, others install aftermarket add-on suspensions on the truck chassis that allow operator control for weight transfer from other axles (such as air lift axles). 137 F-650/750 (TBC) , enUSA, First Printing Load Carrying