Brake Removal And Disassembly - Thrush Aircraft S2R-R1340 Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2R-R1340
into the inner wheel half and align
bolt holes.
G. Install bolts through the inner wheel
half and washers and nuts on the
outer wheel half.
H. Tighten nuts evenly and torque to
150 inch-pounds.
WARNING!
Uneven or improper torque
may cause bolt or wheel
failure.
I. Inflate tube until beads seat on wheel
flanges. Remove valves core and
allow tube to deflate.
J. Install valves core and inflate tires
from 40 to 60 psi. Check to assure
valve stem does not leak before
installing valve cap.
K. Lubricate washer and axle nut (see
Section 2, Servicing). Install wheel
assembly on axle and secure with
washer and axle nut.
L. While manually
torque axle nut to 80 inch-pounds,
continue rotating wheel and back off
to zero inch-pounds. While manually
rotating wheel, torque to 40-inch
pounds. If nut is not to locking
position, advance to next position,
not to exceed 30 degrees, and install
cotter pin.
M. Install hubcap and hubcap retaining
ring.
N. Install brakes back plate assembly
and torque bolts to 60 inch-pounds.
These bolts are self-locking and
should be inspected for the self-
locking feature. Replace bolts if the
self-locking feature is damaged or
destroyed.
O. Wheels may be repainted if the parts
have been repaired and thoroughly
cleaned. Paint exposed areas with
one coat of zinc primer and one coat
Effective: 01/01/08
AIRCRAFT MAINTENANCE MANUAL
rotating wheel,
of aluminum lacquer.
*NOTE*
Do not paint working surfaces
of the bearing cups.
BRAKE REMOVAL AND
DISASSEMBLY
A. Release parking brake.
B. Jack aircraft as outlined in Section 2.
C. Disconnect and cap brake hydraulic
supply line at brake housing.
D. Remove back plate assemblies from
calipers.
E. Remove caliper assemblies.
F. Remove pressure plate assembly.
G. Clean all metal
denatured alcohol
thoroughly. All "0" rings are to be
replaced. Remove
injecting air into the caliper ports (15
to 20 psi) maximum pressure.
WARNING!
Use caution when blowing
pistons out of the caliper
cylinders with air, as pistons
can fly out at high speed.
Turn the caliper over so
pistons are facing the work
table and
impact with rags.
appropriate
clothing and eyewear.
H. Inspect brake cylinders for cracks,
nicks, corrosion
threads. Inspect inlet and outlet
hydraulic ports
contaminates.
walls for scoring or excessive wear.
Blend and polish light scratches in
piston cavities with fine emery cloth,
600 grit. Castings that are cracked
or have damaged threads should be
surfaces with
and dry
pistons by
cushion their
Wear
protective
and damaged
for foreign
Examine cylinder
6-7