THRUSH AIRCRAFT, INC – MODEL S2R-G10
AIRCRAFT MAINTENANCE MANUAL
6-10
REASSEMBLY OF ORGANIC LININGS
TO CALIPER
Ref. figure 6-4
A. Carefully wipe dirt, grease, etc. from
cylinder, pressure plate, and portions
of piston extending beyond cylinder
face, and push piston back into
cylinder.
B. Slide pressure plate with new lining
over anchor bolts and install brake
caliper into torque plate. For
equipment that is operated in an
amphibious environment, or in
extremely wet climates, lubricate the
anchor bolt with Lubriplate or
equivalent. For equipment used in a
non-amphibious temperate
environment, lubricate the anchor bolt
with a dry film lubricant (silicon spray).
DO NOT USE GREASE OR OIL.
These materials will attract dirt
enhance the wear of the anchor pins.
C. Install back plate attachment bolts and
washers in brake caliper.
D. Install insulator shims (typically used
with metallic lining) and spacers as
applicable.
E. Slide back plates between brake disc
and wheel/tire and install back plate
attachment bolts and washers into
back plates.
F. Torque brake assembly back plate tie
bolts to 60 inch/pounds. Two different
types of back plate tie bolts are used.
The patch lock bolt (nylon material
embedded in threaded end) will
required replacement 6 to 8
installations or whenever the bolts can
be run in past the locking feature by
use of fingers only. Bolts with drilled
heads require safety wire after
torquing.
BRAKE LINING CONDITIONING
PROCEDURES
When new linings have been installed, it is
important to condition them properly to
obtain the service life designed into them.
Non-Asbestos Organic Linings
A. Taxi aircraft for 1500 feet with engine
at 1700 rpm applying brake pedal
force as needed to maintain a 5 to 10
mph taxi speed.
WARNING!
DUE TO THE EFFICIENCY OF
THESE BRAKES, EXTREMELY
HARD BRAKING ON AIRCRAFT
WITH TAILWHEELS COULD
RESULT IN THE TAILWHEEL
LIFTING FROM THE GROUND,
POSSIBLY RESULTING IN
NOSEOVER.
B. Allow the brakes to cool for 10 – 15
minutes.
C. Apply brakes and check for restraint at
high static throttle. If brakes hold,
conditioning is complete.
WARNING!
USE EXTREME CAUTION
DURING A HIGH THROTTLE
STATIC RUN-UP TO PREVENT
THE AIRCRAFT FROM NOSING
OVER. UNDER THESE
CONDITIONS THE HOPPER AND
FUEL SYSTEM SHOULD BE
FULL TO HELP KEEP THE
AIRCRAFT FROM NOSING OVER.
D. If brakes cannot hold aircraft during
static run-up, allow brakes to
completely cool and repeat steps A
through C.
E. This conditioning procedure will wear
off high spots and generate sufficient
heat to create a thin layer of glazed
material at the lining friction surface.
Normal brake usage should generate
enough heat to maintain the glaze
throughout the life of the lining.
Properly conditioned linings will provide
many hours of maintenance free service.
A visual inspection of the brake disc will
Page Effective: 03/26/2010
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