Emergency Braking - Bell B35E 6X6 ADT Operator's Manual

park brake on and the transmission is in gear then
the engine torque is limited to 55%.
This limit is set at 55 % so that the park brake can
be tested to function correctly without being able to
drive through it. As soon as the park brake button
on the SSM is released, 100% torque is available
for pull away on steep inclines.
If the park brake is applied while driving (more than
1 km/h) then the engine torque is limited to 0% until
the vehicle speed is below 1 km/h at which time
55% torque is allowed.

Emergency Braking

The park brake can be used (if possible in
conjunction with the retarder) as an emergency
brake if service and secondary brakes fail.
If the service brakes fail after the machine has been
slowed down with the retarder, the machine can be
stopped using the park brake. The following must
be done:
The service brake system is designed such that the
front and rear chassis brakes are applied via two
separate brake control systems. If brake system
failure occurs in one of the systems, the other
system will still have sufficient retardation force to
stop the machine. If both brake systems are
defective use the park brake to stop the machine,
as described above.
• Apply the park brake.
• When the machine has come to full stop, shut
down the engine.
• Do not operate vehicle after emergency brake ac-
tivation. Recover the vehicle to a work shop to be
repaired.
• Replace the park brake pads and disc after emer-
gency brake activation.
• Contact your BELL EQUIPMENT Product Sup-
port Representative.
Design and Function of Prop-Shaft
System and Interaction with Park Brake
The function of the prop shaft is to transmit engine
power to the axles and braking torque from the park
brake to the rear axles. The prop shaft is an integral
component to the functioning of the Park Brake
System
OPERATING INSTRUCTIONS
Failure of Prop Shaft
In the event, that there is a failure of a prop shaft,
apply service brake to bring the truck to a complete
stop and keep engine running, with the service
brake still applied.
Apply the inter axle Differential lock to fix the drive
to the front axle.
Apply the park brake and call for assistance to
chock the machine and conduct a risk assessment
to ensure it is safe to release the service brake.
Operating With IDL (Inter Axle Diff Lock)
The differential lock must not be engaged when the
machine is operating on tar or graded surfaces. This will
cause damage to the differential.
The differential locks should be engaged when
operating at a down hill or operating in ice or slippery
conditions. This will ensure maximum vehicle traction
is achieved.
The IDL is used to activate the inter axle differential
lock in the transfer Case.
If the IDL switch is pressed while the left LED on the
SSM switch is off, then the IDL will be applied and
the left LED will illuminate.
If the IDL switch is pressed while the left LED is
illuminated then the IDL will be switched Off.
The right LED on the SSM switch is for machines
with CTD, which is not applicable to the B18- 30E.
The IDL Status light on the SSM switch on the CDU
should flash if the request is active but feedback
(from pressure switches) indicates that the function
is not engaged.
It is recommended that the IDL lock is engaged
when the machine is travelling over poor ground
conditions.
ATC (Automatic Traction Control)
The ATC is set by default from factory.
If the IDL is switched ON then the ATC will switch
OFF.
When there is spin-out on the wheels the machine
will drop RPM and speed to allow the IDL to engage
for a limited period of time.
OPERATION