Ford F 750 Owners Manual
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Protected components Fuse amp rating Fuse or relay number Customer access trailer brake on/off switch. 5A 31 Delayed accessory power. 15A 32 Driver and passenger door lock switch illumination. 110v power inverter module. Telescoping mirror switch. Not used. — 33 Ancillary translator module run/start. 10A 34 Tow/Haul run/start. 5A 35 Fuel tank select switch. 10A 36 Auxiliary heater. 10A 37 Delayed accessory power. 10A 38 AM/FM base radio. Left and right headlamp high beam. 15A 39 Rear parking lamps. 10A 40 Clearance lamps. Not used. — 41 Ford telematics run/start. 5A 42 Power Distribution Box run/accessory fuses. 10A 43 Wiper relay coil. Customer access upfitter switch power. 10A 44 Ancillary translator module run/accessory sense. Not used. — 45 Climate control module. 10A 46 Fender direction indicator lamps. 15A 47 Power windows switch (crew cab). 30A Circuit breaker 48 Delayed accessory power. Relay 49 168 F-650/750 (TBC) , enUSA, First Printing Fuses
CHANGING A FUSE Fuses WARNING Always replace a fuse with one that has the specified amperage rating. Using a fuse with a higher amperage rating can cause severe wire damage and could start a fire. If electrical components in the vehicle are not working, a fuse may have blown. Blown fuses are identified by a broken wire within the fuse. Check the appropriate fuses before replacing any electrical components. FuseTypes Fuse Type Callout Micro 2 A Micro 3 B Maxi C Mini D 169 F-650/750 (TBC) , enUSA, First Printing FusesE217331 E207206
Fuse Type Callout M Case E J Case F J Case Low Profile G 170 F-650/750 (TBC) , enUSA, First Printing Fuses
VEHICLE INSPECTION INFORMATION To make sure your vehicle is ready to operate, conduct a pre-trip inspection at the beginning of each work period. Follow the steps listed in this section to verify a proper vehicle inspection procedure. WARNINGS Exercise great caution when working on a vehicle equipped with an automatic fan clutch. The fan starts in motion only after the engine coolant reaches a predetermined temperature or the refrigerant pressure (if equipped with air conditioning) reaches a predetermined setting. The fan starts at this point with no advance warning. Never reach near, or permit objects to protrude into, the fan blade radius while the engine is running as this could result in vehicle damage, personal injury or death. WARNINGS Do not operate the vehicle if any suspension conditions listed in the following charts are evident. Loss of steering or suspension could result in property damage, personal injury or death. If a wheel must be changed, obtain expert tire service help. Mounting and un-mounting of tires should only be performed by a qualified technician using necessary safety procedures and equipment, otherwise the result could be property damage, personal injury or death. Note: Always make sure you apply the parking brake before starting the engine. Engine compartment (with engine off) Use the dipstick to verify the oil level is in the proper operating range. See Engine Oil Dipstick (page 185). Engine oil Look through the plastic reservoir and verify the coolant level is within the proper operating range. Do not remove the pressure cap until the coolant has cooled. See Engine Coolant Check (page 189). Engine coolant Verify that the fluid level is in the proper operating range. See Power Steering Fluid Check (page 201). Power steering fluid Remove the master cylinder caps and inspect the fluid level. See Brake Fluid Check (page 200). Brake fluid 171 F-650/750 (TBC) , enUSA, First Printing Vehicle Inspection Guide
Engine compartment (with engine off) Inspect for glazing, fraying or cracking. There should be no more than 5-7 cracks per rib, per 1 in (2.5 cm) Belts (fan, alternator, water pump and air conditioning compressor) Inspect for signs of fluid puddles or dripping fluid on the ground under the engine, or the underside of the engine. Fluid leaks Inspect for debris that may have collected on the HVAC air inlet grille or inside the exterior module as this may reduce system performance. HVAC air inlet Engine starting (with parking brake applied) Before entering the cab, verify that the vehicle is equipped with spare electrical fuses (if used), three red reflective triangles, a properly charged and rated fire extinguisher and wheel chocks. Safety and emergency equipment Walk around the vehicle and verify all steps and grab handles, inside and out (as well as behind), are tight and clean. Use extreme caution and a three-point stance at all times. Inspect door latches for proper closing, latching and locking. Set the parking brake. Make sure the gearshift lever is in neutral (N) or park (P) (if equipped with a park position). Starting the engine Diesel engine: Turn the key to the on position. Turn the key to start when the wait to start indicator light in the instrument cluster turns off. Gasoline engine: Turn the key to start, and then release it as soon as the engine starts. Verify pressure builds to normal operating range. Engine oil pressure A tone indicating low air pressure should sound immediately after the engine starts but before the compressor has built- up pressure. The tone should stop when the air pressure reaches 70 psi (483 kPa). Let the air pressure build to governed cutout pressure, which should occur between 115– 130 psi (793–896 kPa) . Low air pressure warning tone (if equipped with an air compressor) Press the accelerator and verify that it operates smoothly, without any binding or irregular feel. Release the pedal and verify the engine returns to idle speed immediately. Accelerator 172 F-650/750 (TBC) , enUSA, First Printing Vehicle Inspection Guide
Engine starting (with parking brake applied) Check the gauge (diesel engine) or indicator light (gasoline engine) to verify the alternator is charging. Voltmeter Inspect for excessive free play in the steering linkages. The steering wheel should have less than 2 in (5 cm) of free play at its rim. Steering linkage free play Verify the parking brake holds the vehicle by gently trying to pull forward with the parking brake applied. Parking brake Verify operation using the following procedure. Chock the wheels, if necessary. Push in the parking brake and, on tractors, push in the tractor parking brake knob: Air brakes 1. Verify the air compressor or governor cutout pressure is approximately 120 psi (827 kPa). 2. Turn off the engine, and then turn the key back to the on position (without starting the engine). 3. Without the brake pedal applied, note the air pressure drop for one minute. It should be less than 2 psi (14 kPa) for single vehicles and 3 psi (21 kPa) for combination vehicles. 4. Press and hold the brake pedal with 90 psi (621 kPa) or more. Make sure there is no more than a 3 psi (21 kPa) per minute leak for single vehicles and a 4 psi (28 kPa) minute leak for combination vehicles. 5. Pump the brake pedal to deplete the system of air pressure. The warning light and tone should turn on at 57 psi (393 kPa). 6. Pump the brake pedal and make sure the parking brake and trailer parking brake knobs pop out at 20 psi (138 kPa) or higher. Verify that the fluid level is in the proper operating range. See Automatic Transmission Fluid Check (page 198). Automatic transmission fluid Front of vehicle Verify all exterior lights illuminate and are clean. Lights Check headlights function on high and low beam. Verify reflectors are clean, unbroken and of proper color (red on rear, amber elsewhere). 173 F-650/750 (TBC) , enUSA, First Printing Vehicle Inspection Guide
Front of vehicle Verify running lights are clean and unbroken. Inspect for any missing or loose fasteners, power steering fluid leaks and damage to power steering hoses. Steering gear Verify connecting links, arms and rods are not worn or cracked. Steering linkage Verify joints, sockets and boot seals are not worn or loose. Verify cotter keys, nuts and bolts are not loose or missing. Inspect front and rear tow hooks for damage or loose mounting. This is particularly important on vehicles that use them frequently. Tow hooks Front suspension Inspect for missing, broken or shifted leaves, or leaves that may be in contact with (or nearly contacting) a tire, rim, brake drum, frame or body component. Springs Note: Never apply grease to spring pads. Make sure there the following items are properly tightened and that there are no cracks, breaks, wear, damage to spring hangers, bolts, bushings, axle mounting bolts, and nuts. Spring mounts Inspect for any cracks, leaks, or missing or broken bolts or bushings. Shock absorbers 174 F-650/750 (TBC) , enUSA, First Printing Vehicle Inspection Guide
Front brakes Inspect for cracked, worn or frayed hoses, and that all coup- lings are secure. Hoses Verify that there are no cracks or dents, and that the cham- bers are securely mounted. Brake chambers Inspect for broken, loose or missing parts. Slack adjusters Note: The angle between the push rod and adjuster arm should be approximately 90 degrees when the brakes are applied. When pulled by hand, the push rod should not move more than approximately 1 in (2.5 cm). Verify that there are no cracks, dents, holes, and no loose or missing bolts and that the brake linings are not worn, dangerously thin or contaminated by lubricant. Drums Front wheels Inspect for damaged or bent rims. They should not have welding repairs, and there should be no rust trails, which indicate it is loose on the wheel. Rims Verify all lug nuts are present and not loose (look for rust trails around the lug nuts). There should be no cracks radiating from the lug bolt holes or distortion of the bolt holes. Lug nuts Inspect wheel hub oil seal for leaks and, if sight glass if present, verify the oil level is adequate. Hub oil seals Inspect for proper lubrication level if the hubcap has a trans- parent window. If the hubcap does not have a transparent window, remove the rubber fill-plug and inspect for proper level. Oil-lubricated front wheel bearings Fuel area Verify the tank(s) and cap(s) are secure and that there are no leaks from the tank(s). Fuel tank(s) Inspect for leaks from the tank(s). Leaks 175 F-650/750 (TBC) , enUSA, First Printing Vehicle Inspection Guide
Diesel Exhaust Fluid (DEF) area Verify the tanks and caps are secure and that there are no leaks from the tanks. DEF tanks Inspect for leaks from the tanks. Leaks Underbody Verify that the driveshaft is not bent or cracked and that all driveshaft couplings are secure. Driveshaft Verify that the visible outside parts are securely mounted and that there are no cracks, holes or severe dents. Exhaust system Inspect for cracks or bends in longitudinal frame members. Verify there are no loose, cracked, bent, broken or missing crossmembers or crossmember fasteners. Frame Rear of vehicle Verify there are no cuts, cracks, chafing or wear on the air hoses and electrical line insulation. Listen for audible air leaks. Air hoses and electrical lines Verify air and electrical lines are not tangled, crimped or pinched or being dragged against any truck parts. None of the air or electrical line should be spliced or taped. Inspect for corrosion on pins and in electrical sockets to verify continuity and reduced heat build-up potential. Verify the deck plate is clean, bolted securely to the frame and is clear of loose objects. Deck plate Verify that both brake lights illuminate when the pedal is applied, each signal flashes and that the four-way flashers work properly. Turns signals, brake lights and flashers Verify all exterior lights illuminate and are clean. Lights and reflectors Verify reflectors are clean, unbroken and of proper color (red on rear, amber elsewhere). Verify running lights are clean and unbroken. Note: Inspect rear running lights separately from signal, flasher and brake lights. 176 F-650/750 (TBC) , enUSA, First Printing Vehicle Inspection Guide
Tractor-coupling system Inspect for loose or missing mounting brackets, clamps, bolts or nuts. Verify solid attachment of both fifth wheel and the slide mounting. Mounting bolts Inspect for cracks or breaks in the platform structure. Platform Verify engagement of the safety latch. Safety latch Verify the safety latch is in the engaged position, and that any safety latch is in place. Release arm Verify the kingpin is not bent or worn, the apron lies flat on the fifth-wheel skid plate and that the visible part of the apron is not bent, worn, cracked or broken. Kingpin and apron Rear suspension Inspect for missing, broken or shifted leaves, or leaves that may be in contact with (or nearly contacting) a tire, rim, brake drum, frame or body component. Springs (if equipped) Inspect for any cracked or broken spring hangers; broken missing or loose bolts; missing or damaged bushings; broken, loose or missing axle mounting parts. Spring mounts (if equipped) Verify torsion arm is not cracked, broken or missing. Torsion arm and shock absorbers Inspect the shock absorber for cracks or leaks. There should be no missing or broken mounting bolts or worn bushings. Inspect for missing, broken or leaking components. Air suspension (if equipped) Inspect for any cracked, broken or loose bolts; missing or damaged bushings; broken, loose or missing axle mounting parts. 177 F-650/750 (TBC) , enUSA, First Printing Vehicle Inspection Guide