2015 FORD F750 hydraulic

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Page 192 of 384

FORD F750 2015 13.G Owners Manual Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
209 — Auxiliary stop lamp relay
301 — Fuel heater/Fuel transfer pump relay (diesel
engine only)
— Fuel pump module (gasoline engine only)
302

Page 194 of 384

FORD F750 2015 13.G Owners Manual Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
16 15A High beams, Indicator
17 — Not used
18 5A Dimmer switch, Interior lighting
19 15A Engine control (diesel engine only)
20 5A Starting syste

Page 195 of 384

FORD F750 2015 13.G Owners Manual Relay Center
The relay center is located along the passenger side A-pillar on the right
side of the footwell.
Relay
LocationRelay Description
R1 Spring applied hydraulic release warning chime module o

Page 197 of 384

FORD F750 2015 13.G Owners Manual Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
4 30A* Trailer tow turn/stop lamps (combined)
Trailer tow turn lamps (separate)
5 — Not used
R1 — Trailer tow ABS relay (non electric trailer
b

Page 204 of 384

FORD F750 2015 13.G Owners Manual Desiccant air dryer:Inspect for moisture in the air system by opening
reservoirs, draincocks or valves and checking for presence of water. The
presence of small amounts of water due to condensation is

Desiccant air dryer:Inspect for moisture in the air system by opening
reservoirs, draincocks or valves and checking for presence of water. The
presence of small amounts of water due to condensation is normal and is
not an indication that the dryer is not functioning properly.
Replace or rebuild the desiccant cartridge when you determine that the
desiccant is contaminated and does not have adequate water absorption
capacity. The desiccant change interval may vary. A general
recommendation is to replace the desiccant every 12 months (yearly). If
experience has shown that extended or shortened life has resulted for a
particular installation, then the yearly interval can be increased or
decreased accordingly.
Draining the air brake reservoir:
Completely drain all the air brake
reservoirs daily by opening the
draincock at the ends of the tanks.
(Where accessible. Pull-chains are
used when the drains are undercab
or otherwise inaccessible.) Close the
draincock after draining. Manually
drain any air tanks equipped with
automatic moisture ejector valves,
as required, to maintain a dry air
system. Contact an authorized dealer if you are unsure of the air
reservoir locations or the draining procedure.
WARNING:Failure to drain air brake reservoirs can result in a
reduction or loss of braking ability due to fluid accumulation in
the reservoir and/or possible freeze-up during cold weather.
Hydraulic Brakes
Establish a regular schedule for periodic cleaning, lubrication and
adjustment inspection based on vehicle use. Exact maintenance intervals
are difficult to predetermine due to vehicle applications and operating
conditions. If you are uncertain of the proper schedule for your vehicle,
contact an authorized dealer.
Regular inspections should include:
•Checking the brake lining (every service interval). Establish
inspection intervals that provide for lining replacement before damage
to the disc occurs. Excessive lining wear may expose the backing
plate to the disc causing scoring of the disc faces. A qualified
technician should perform this inspection and keep to instructions
Maintenance203
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

Page 205 of 384

FORD F750 2015 13.G Owners Manual provided by the service manual. Hydraulic brake systems are
power-assisted. There is a great reduction in braking capabilities
without engine assist.
•Proper fluid level. The level should be at the

provided by the service manual. Hydraulic brake systems are
power-assisted. There is a great reduction in braking capabilities
without engine assist.
•Proper fluid level. The level should be at the bottom edge of the ring
on each reservoir fill port. Do not fill the master cylinder to the top of
the reservoir. If fluid level requires attention to maintain a proper
master cylinder level, this is an indication of either severe operation
(pad wear) or fluid leakage. A more frequent and thorough brake
inspection is required.
•Brake lines, hoses and fittings. Repair or replace brake line tubes,
hoses or fittings as required. Inspect these components every
4000 miles (6000 kilometers):
•Lines for kinks, dents, corrosion or rupture.
•Hoses for abrasions, kinks, soft spots or rupture, collapse, cracks,
twists or loose frame supports. When replacing a hose, be sure
there is adequate clearance to the hose to avoid an abrasion to the
new hose.
•All connections for leaks.
Driveline Parking Brake
WARNING:Use wheel chocks and exercise caution when
inspecting under the vehicle. A vehicle roll-away could result in
property damage, personal injury or death.
A qualified technician should adjust the parking brake and keep to the
instructions in the service manual.
Steering System
WARNING:Failure to maintain the steering system in proper
condition can cause reduced steering ability resulting in property
damage, personal injury or death.
Note:Have any steering problems immediately corrected by a qualified
service technician.
Ask your service technician to examine the steering mechanism. Only
minor adjustments may be necessary. Regular inspections should include:
•Checking the tie rod, drag link end clamp bolts and ball joints for
proper tightness.
•Checking for installation and spread of cotter pins and tightness of
nuts at both ends of the tie rod and drag link.
204Maintenance
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

Page 206 of 384

FORD F750 2015 13.G Owners Manual •Checking that the pitman arm (steering arm at steering gear)
mounting is tight and locked. Check system for leaks or hose chafing.
Repair immediately, if necessary.
•Maintaining proper steering g

•Checking that the pitman arm (steering arm at steering gear)
mounting is tight and locked. Check system for leaks or hose chafing.
Repair immediately, if necessary.
•Maintaining proper steering gear and power steering pump lubricant
levels.
•Checking steering column joint bolts and steering linkage, particularly
for body-to-chassis clearance.
Steering Column Joint Bolts
As a good maintenance practice, check steering column joint bolt
tightness every 60000 miles (96000 kilometers) or annually, whichever
occurs first. Do not overtighten the bolts.
Hydraulic System
Whenever draining and refilling the power steering’s hydraulic system for
any reason, bleed air from the system before returning the vehicle to
service. Failure to bleed the hydraulic system properly can result in
degradation of power system performance.
Consult an authorized dealer who is aware of the proper procedures for
filling and bleeding the system.
Catalytic Converter (Diesel Engine)
Note:If your vehicle is equipped with a catalytic converter or muffler,
do not blend waste oil with diesel fuel. Operate only on ultra-low sulfur
(less than 15 parts per million sulfur) diesel fuel with a cetane value of
45 or higher.
If your diesel engine is equipped with a catalytic converter, it is
important to review the maintenance schedule to make sure proper
functioning of the catalytic converter. Also, take precautions not to
damage the catalytic converter when servicing your engine or storing
your vehicle.
Diesel Exhaust Fluid (DEF), Diesel Particulate Filter (DPF) and
Select Catalyst Reduction (SCR) System
See your engine operator’s manual for information about DEF, DPF and
SCR system service
Air Induction System
WARNING:When performing maintenance to any turbocharged
engine with engine air inlet piping disconnected, keep loose
clothing, jewelry and long hair away from the engine air inlet piping. A
turbocharger compressor air inlet protective shield should be installed
over the turbocharger air inlet to reduce the risk of personal injury or
death.
Maintenance205
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

Page 343 of 384

FORD F750 2015 13.G Owners Manual Daily Owner Checks
U.S. Department
of Transportation,
Federal Highway
Administration
Requirements
(Make sure the
entire system is
functioning
properly.)Service brakes and parking brake.
Steering mecha

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