2008 FORD F750 Owners Manual

Page 97 of 273

FORD F750 2008 11.G Owners Manual If the parking brake is applied due to low air pressure, immediate service
is required to the parking brake system.
Parking brake warning system
If the park brake light blinks and a chime sounds when

Page 98 of 273

FORD F750 2008 11.G Owners Manual Loosen the jam nut (1) and un-thread the adjustment rod (2) from the
chamber to reduce tension on the cable (3). Continue to un-thread the
adjustment rod all the way and remove it from the chamber. Th

Page 99 of 273

FORD F750 2008 11.G Owners Manual 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

Page 100 of 273

FORD F750 2008 11.G Owners Manual Cam brakes - automatic slack adjusters
Standard air brakes (cam) are
equipped with automatic brake
adjusters. Automatic adjustment
occurs during brake applications.
Inspect brakes for proper
adjustmen

Page 101 of 273

FORD F750 2008 11.G Owners Manual Drain all the air brake reservoirs
daily, completely to 0 psi/kPa, by
opening the draincock at the ends
of the tanks (where accessible.
Pull-chains are used when the
drains are undercab or otherwise
i

Page 102 of 273

FORD F750 2008 11.G Owners Manual Parking brake control (knob)
Pull the yellow parking brake knob
out to apply the parking brake. Push
the knob in to release the parking
brake.
This control is used for
parking only. Do not leave
the v

Page 103 of 273

FORD F750 2008 11.G Owners Manual Releasing spring brake manually
Do not attempt to disassemble the parking brake chamber under
any circumstances. The high spring load may cause serious
injury if the chamber clamps are removed.
If air

Page 104 of 273

FORD F750 2008 11.G Owners Manual 4. Turn the release stud one-quarter
turn to engage the stud tangs with
the slot in the pressure plate. Keep
the stud engaged and install the nut
on the release stud.
5. Tighten the nut until the spri