Milton CAT 777F - Manual (Page 10)

Integrated Braking System. The Cat
oil-cooled braking system delivers
reliable performance and control in
the most extreme haul-road conditions.
The integrated system combines the
service, secondary, parking brake and
retarding functions in the same system
for optimum braking efficiency.
Oil-Cooled Multiple Disc Brakes.
Caterpillar hydraulically controlled
four-wheel, forced oil-cooled, multiple
disc service brakes are continuously
cooled for exceptional, non-fade
braking and retarding performance.
Extended Life Disc Brakes (optional).
Extended life friction material has double
the wear life of standard brakes and is
twice as resistant to glazing for more
consistent braking power with less noise.
Brake Design. Cat oil-cooled disc brakes
are designed with large discs and plates
for reliable, adjustment-free operation
and performance. Brakes are completely
enclosed and sealed to prevent
contamination and reduce maintenance.
Long Life. An oil film prevents direct
contact between the discs. This design
absorbs the braking forces by shearing
the oil molecules and carrying heat
away to extend brake life.
Pistons. The Caterpillar two-piece piston
design combines the service, secondary,
parking brake and retarding functions
in the same system. The primary piston
hydraulically actuates both service and
retarding functions. The secondary
piston is spring-applied and held in
the disengaged position by hydraulic
pressure. If hydraulic system pressure
drops below a specified level, the
spring-applied secondary piston
automatically applies the brakes.
Parking Brake. Oil-cooled, spring-
applied, hydraulically released parking
brake is applied to the rear wheels for
superior parking capability on all grades
up to 15 percent.
Four Corner Retarding. Four corner
retarding with 60/40 percent split
(rear/front) in braking effort provides
superior control in slippery conditions.
Balanced front to rear brake torque
provides exceptional braking performance
and minimizes wheel lock-up, especially
during retarding.
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Reliable braking with superior control gives the operator the confidence to focus
on productivity.
Brake System