THRUSH S2R – G10 - Brake Servicing; Measuring Brake Lining Wear; Removal of Brake Linings from Calipers; Replacement of Organic Linings

THRUSH AIRCRAFT, INC – MODEL S2R-G10
AIRCRAFT MAINTENANCE MANUAL
Page
6-8 Effective: 03/26/2010
L. Inspect brake cylinder bolts for cracks,
damaged threads, and self-locking
feature. Replace bolts that are
cracked, bent or have damaged
threads.
M. Inspect brake linings for cracks, edge
chipping, and surface deterioration.
Linings should be replaced when worn
to a thickness of 0.100 inch (see Fig.
6-3).
N. Inspect torque plate for cracks, nicks,
burrs, rust, excessive wear and
brinelling in bolt holes. Replace
torque plate if cracked or severely
deformed.
O. Clean repaired surfaces and areas of
the brake assembly from which paint
has been removed.
P. Paint exposed areas with one coat of
zinc primer and one coat of aluminum
lacquer.
Q. Check the wheel brake disc. See
procedures under Inspection of Main
Wheel Assembly and Figure 6-3.
BRAKE SERVICING
MEASURING BRAKE LINING WEAR
Ref. figure 6-3
The minimum wear thickness for
replacement of metallic linings is 0.100
inch.
REMOVAL OF BRAKE LININGS FROM
CALIPERS
A. Remove backing plate attaching bolts
and washers, and remove back plates
and insulator shim.
B. Carefully slide brake caliper out of
torque plate bushing.
C. Slide pressure plate assembly (lining
carrier) off anchor bolts.
REPLACEMENT OF ORGANIC LININGS
Ref. figure 6-4
Old organic linings may be removed by
using a small drift pin or carefully drilling
out the rivets with a 1/8-inch diameter drill.
Use care to prevent elongating the rivet
holes. Deburr the surface adjacent to the
lining to allow lining to set flush.
A. Clean pressure plate and back plate
surfaces of dirt, grease, etc. before
installing new linings.
B. Inspect pressure plate and back plate
for excessive corrosion, visible
damage, or excessive warping.
Straighten pressure plate too less than
0.010 inch (0.254mm) flatness.
C. Align new factory authorized
replacement lining segments on
pressure plate/back plates and install
P/N 105-0200 rivets, using Cleveland’s
rivet set, P/N 199-1, or appropriate
riveting tool.
D. Check to be sure lining is tight and
movement free with no distortion of
parts.
E. With tubular rivets, splits may result
from the clinching operation. Refer to
rivet sketch (figure 6-4) for acceptance
criteria.