Briggs & Stratton Legacy XL Operator's Manual page 16

Parking Brake Function
Applying the Parking Brake - See Figure 4. To lock the
parking brake, release the ground speed pedals (A), fully
depress the brake pedal (B), pull the parking brake knob
(C) out, and then release brake pedal.
Releasing the Parking Brake - See Figure 4. To release
the parking brake, fully depress the brake pedal (B) and
push in the parking brake knob (C).
C B
A
Figure 4
Automatic Controlled Traction
What is Automatic Controlled Traction?
Automatic Controlled Traction (ACT) is an exclusive feature
of our transmissions that provides improved traction. ACT
applies a preset amount of torque to both rear wheels even
if one starts slipping (a transmission without ACT will lose
traction completely if one rear wheel starts slipping). This
preset torque is just enough to provide additional traction,
and still allow the wheels to turn at different speeds in a
tight turn without damaging the lawn.
What to Expect from Your ACT Tractor?
For the most part, while using your tractor you will not notice
ACT working, and you will simply become accustomed to
increased traction an ACT transmission provides.
Under certain circumstances the ACT system limit can be
exceeded, and one of the rear wheels may slip (for instance
if trying to turn up a hill while accelerating). This is normal. If
you start to lose traction, do not speed up. Instead, slow to
a stop, straighten the steering wheel, and slowly accelerate.
Stopping the tractor allows the transmission to regain more
traction.
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