2008 FORD F650 service indicator

Applying the parking brake
To apply the parking brake, pull the yellow, dash-mounted parking brake
knob. A red light on the dash panel should illuminate indicating that the
parking brake has been successfully set.
Note:If the park brake indicator light blinks and a warning chime
sounds when the control knob is pulled, the parking brake is not
functioning properly; seek immediate service from your dealer. Refer to
theParking Brake Warning Systemsection.
Releasing the parking brake
Note:Read and understand the following steps and perform them
whenever you prepare to drive the vehicle.
Note:The parking brake will not disengage unless sufficient system air
pressure is available.
For vehicles with automatic transmissions - dash-mounted push
button (Allison 3000 Series) and steering column-mounted
(Allison 2200 and 2500) gear selection:
1. With the engine running, depress and hold the service brake pedal.
2. Wait until system air pressure is above 100 psi (690 kPa).
3. Select the appropriate drive gear.
4. Push the yellow, dash-mounted parking brake knob.
For vehicles with manual transmissions - (TTC 7–speed,
Eaton/Fuller 5–speed and 6–speed):
1. With the engine running, depress and hold the service brake pedal.
2. Wait until system air pressure is above 100 psi (690 kPa).
3. Depress and hold the clutch pedal.
4. Select the appropriate drive gear.
5. Push the yellow, dash-mounted parking brake knob.
Hold the brake pedal down while moving the gearshift lever from
position to position. If the brake pedal is not held down, the
vehicle may move unexpectedly resulting in property damage, personal
injury or death.
Parking brake light illumination due to low air pressure
If at any time during vehicle operation air pressure is too low, the
parking brake may apply and the parking brake light will turn on.
2008 F-650/750(f67)
Supplement
USA(fus)
Driving
95

Periodically check the air pressure
gauge while driving. Pressure should
range between approximately
100–125 psi (690–862 kPa). The air
compressor governor cut-in and
cut-out pressure settings are preset
at the factory and are not
adjustable.
When air pressure is insufficient
(below 60 psi [414 kPa]), a warning
light illuminates and a buzzer
sounds when the ignition is in the
ON position.
This condition may be caused by excessive brake applications depleting
the system air pressure. If this condition occurs, stop driving the vehicle
until the compressor has fully recharged the air system.
Do not move the vehicle when the air pressure is insufficient
because the brake system may be inoperative.
Select a gear ratio to help slow your vehicle before descending grades.
Supplement with brakes as required to safely slow the vehicle and avoid
overspeeding the engine.
Air chamber stroke indication
Air chamber push rods have orange stroke indicator markers that warn
when the braking system requires adjustment or repair. The orange
stripe is painted on the air chamber push rod at the slack adjuster stroke
dimension which requires service when visible during brake application.
Air brake inspection and adjustment or repairs should be performed by a
qualified service technician in accordance with the instructions in the
service manual.
2008 F-650/750(f67)
Supplement
USA(fus)
Driving
98

on original equipment chambers now incorporate a stroke indicator to
aid in adjustment checks; an orange paint marker near the base of the
push rod. If the push rod is clean and the brakes are out of adjustment,
the orange marker can be seen protruding from the chamber when the
brakes are applied.
Do not manually adjust the automatic slack adjusters to correct
excessive pushrod stroke as it may result in reduced brake
effectiveness and a vehicle crash. Excessive pushrod stroke indicates
that a problem exists with the automatic adjuster, with the installation
of the adjuster, or with foundation brake components that manual
adjustment will not remedy. Seek service from a qualified facility for
excessive pushrod stroke.
Inspect the brake lining every maintenance interval. When brake lining or
blocks are worn to within 1/16 inch (1.6 mm) of rivets, brake lining must
be replaced. This inspection or adjustment should only be performed by
a qualified technician and must be in accordance with instructions
provided by the service manual.
Do not back off or disconnect the front brakes so that they are less
effective, letting the rear brakes do all the stopping of the vehicle. Do
not overlook the brakes on the trailer, either. Brake condition on the
trailer is just as important as the tractor. Proper brake balance on trucks
and tractor-trailers is essential for effective braking.
Once a year, the entire brake system must be inspected. Check the
following:
•Any rubber as it may deteriorate whenever used. Rubber brake
components should be inspected by a qualified technician and
replaced as necessary. Replacement intervals vary according to the
severity and length of vehicle service.
•Condition of brake drums, brake chambers and slack adjusters.
•System for air leaks.
•Hose or pipes for rust, damage and deterioration.
•Operation of service and parking brakes.
Some parts such as air brake chamber diaphragm, air compressor and air
cleaner should be inspected periodically and replaced if considered
unserviceable.
2008 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
164

speedometer .............................27
tachometer ................................27
trip odometer ............................27
H
Hazard flashers .........................135
Headlamps ...................................47
aiming ........................................48
daytime running lights .............47
high beam .................................47
warning chime ..........................21
Heating ..................................44–45
heater only system ...................44
manual heating and air
conditioning system .................45
Hood ..........................................168
I
Ignition .........................................85
chime .........................................21
Infant seats
(see Safety seats) .......................81
Instrument panel
cleaning ...................................157
lighting up panel and
interior .......................................48
J
Jump-starting your vehicle ......142
K
Keys
key in ignition chime ...............21
positions of the ignition ...........85L
Lamps
bulb replacement
specifications chart ..................49
cargo lamps ...............................48
daytime running light ...............47
headlamps .................................47
high beams ................................47
instrument panel, dimming .....48
interior lamps ...........................49
replacing bulbs ...................49–51
Lane change indicator
(see Turn signal) ........................48
Lights, warning and indicator ....21
air suspension ...........................21
anti-lock brakes (ABS) ....21, 111
brake ..........................................21
charging system ........................21
safety belt .................................21
service engine soon ..................21
traction control off ...................21
turn signal indicator .................21
Lubricant specifications ...........209
M
Manual transmission .................119
lubricant specifications ..........209
Mirrors .........................................55
fold away ...................................57
heated ........................................56
side view mirrors (power) .......56
O
Odometer .....................................27
P
Paint chips, repairing ...............156
2008 F-650/750(f67)
Supplement
USA(fus)
Index
264