Thrush Aircraft S2R-R1340 Maintenance Manual page 67

THRUSH AIRCRAFT, INC – MODEL S2R-R1340
The master cylinder piston is actuated by
the push rod, which is in turn actuated by
a mechanical linkage to the rudder pedal
(Ref. Fig. 3-2). Pushing the toe of the
rudder pedal actuates this mechanism,
moves the piston, and thereby forces
hydraulic fluid into the hydraulic line to
the wheel brakes. The piston is returned
by a spring so that hydraulic pressure is
maintained only while the toe brake is
depressed.
Figure 3-2: Brake Master Cylinder and Rudder Pedal Installation
Effective: 01/01/08
AIRCRAFT MAINTENANCE MANUAL
Hydraulic fluid reservoirs should be kept
at least half full. If brake "sponginess" is
experienced, check the master cylinder
reservoir first. If it is empty or nearly
empty, it should be filled and the brake
system bled.
The master cylinders also have a lever
which locks the push rod in place to hold
the parking brakes on.
3- 3