BENDIX BW7514 User Manual
c
R. Steer
c
L. Steer
Steer Axle
Drive
Axle
Additional
Axle
Trailer Front
Axle
Trailer Rear
Axle
c
L. Drive
c
R. Drive
c
L. Add’l.
c
L. Trlr. Front
c
L. Trlr. Rear
c
R. Add’l.
Check
box(es)
where
Thermal
Overload is
suspected.
c
R. Trlr. Front
c
R. Trlr. Rear
Bendix
®
Air Disc Brake
Checklist for
Identifying Single Wheel
End Thermal Overload
Follow all General Safety
Guidelines (see final page.)
Start Here
Question One:
Do any of the rotors have
bright orange or red
color edges?
Check the box(es) on the
vehicle diagram to the
right for any found.
Normal
Evidence of thermal overload
Question Two:
Are any of the calipers
coated with a bright
orange or red colored
dust? Check the box(es)
on the vehicle diagram to
the right for any found.
Normal
Evidence of thermal overload
Question Three:
Are any tappets and/or
guide pin boots heat
damaged? Check the
box(es) on the vehicle
diagram to the right
for any found.
Typical
Evidence of thermal
overload
Evidence of thermal
overload
Are
both boxes
on a single axle
checked?
Are
any boxes
checked?
Only
one box has a
check mark?
YES
YES
YES
NO
NO
NO
Go to Section Two
(over)
In cases where more than one wheel end is affected — but on different
axles — complete a separate checklist for each brake being examined.
This is not a single wheel end
Thermal Overload event.
When both ends of an axle are
affected, a thorough brake system
diagnosis is needed, as other
factors — such as brake balance,
overloaded vehicles, or extreme
use — are more likely the source.
SECTION ONE: Inspect the Vehicle
All foundation brakes are designed to convert kinetic energy (energy of motion) into heat
and work (to stop the vehicle).
Air disc brakes work the same way and in everyday operation — compared to drum brakes
Air disc brakes work the same way and in everyday operation — compared to drum brakes
— will produce higher braking temperatures and cool off faster. Also, air disc brakes
will often have differences in temperatures at wheel ends on the same axle. The actual
temperatures reached will depend on the vehicle configuration, vocation and brake usage.
This document is intended to help technicians identify instances where an individual wheel
This document is intended to help technicians identify instances where an individual wheel
end has evidence of thermal overload, and check for potential causes.
STOP!
Exit this
flowchart.