Cirrus SR20 Pilot Operating Handbook page 212

Section 7
Airplane and Systems Description
Braking pressure is initiated by depressing the top half of a rudder pedal
(toe brake). The brakes are plumbed so that depressing either the pilot's
or copilot's left or right toe brake will apply the respective (left or right)
main wheel brake.
The reservoir is serviced with MIL-H-5606 hydraulic fluid (Serials 2016
thru 2240 before SB2X-32-21), or MIL-PRF-87257 hydraulic fluid (Serials
2016 thru 2240 after SB2X-32-21, 2241 & subs).
Brake system malfunction or impending brake failure may be indicated by
a gradual decrease in braking action after brake application, noisy or
dragging brakes, soft or spongy pedals, excessive travel, and/or weak
braking action. A temperature sensor is mounted to each brake assembly
and provides measured brake temperatures to the avionics system for
caution and warning annunciation.
Should any of these symptoms occur, immediate maintenance is required.
If, during taxi or landing roll, braking action decreases, let up on the toe
brakes and then reapply the brakes with heavy pressure. If the brakes are
spongy or pedal travel increases, pumping the pedals may build braking
pressure.
Refer to Section 10,
System operational considerations.
Parking Brake
Do not set the PARK BRAKE in flight. If a landing is made with
the parking brake valve set, the brakes will maintain any pressure
applied after touchdown.
The main wheel brakes are set for parking by using the PARK BRAKE
handle on the right side kick plate near the pilot's right knee. Brake lines
from the toe brakes to the main wheel brake calipers are plumbed through
a parking brake valve. For normal operation, the handle is pushed in. With
the handle pushed in, poppets in the valve are mechanically held open
allowing normal brake operation. When the handle is pulled out, the
parking brake valve holds applied brake pressure, locking the brakes. To
apply the parking brake, set the brakes with the rudder-pedal toe brakes,
and then pull the PARK BRAKE handle aft.
7-28
Taxiing, Steering, and Braking Practices
• Caution •
Cirrus Design
SR20
for Brake
P/N 21399-004
Revision A1