Thrush Aircraft S2R-T660, Maintenance Manual

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THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
WHEELS AND BRAKES
GENERAL DESCRIPTION
The divided type wheels (including tail wheel) are machined castings, consisting of two sections
called wheel halves. The wheel halves, which are secured together by bolts and nuts, are
interchangeable, and the complete wheel assemblies are interchangeable according to wheel size.
The wheels operate on tapered roller bearings that rotate in hardened steel races pressed into each
wheel half. A brake disc assembly is bolted to the wheel and turns with the wheel. Applying pressure
to the rudder-brake pedals individually controls the hydraulic brakes attached to the main landing
gear. Movement of a rudder-brake pedal operates the corresponding master brake cylinder,
attached to the aft side of the rudder pedals, and applies pressure to the appropriate brake. The
brakes are self-adjusting, easily checked for wear, and can be quickly overhauled by field activities.
MAIN WHEEL REMOVAL AND DISASSEMBLY
DIVIDED TYPE WHEEL (Cleveland)
To remove and disassemble a main landing gear wheel, proceed as follows:
A. Jack aircraft as outlined in Section Two.
B. Remove valve-core and deflate tire completely.
C. Remove bolts and washers from back plates of brake assembly and remove back plates.
D. Remove hubcap snap ring, hubcap, cotter pin, nut, washer, bearing and wheel assembly
from landing gear.
E. Break tire bead from wheel by using a mallet (do not use tire irons).
F. Remove bolts, washers and nuts and separate wheel halves. Guard valve stem to avoid
damage while removing tire and tube.
G. Remove brake disc from brake side of wheel. If disk sticks, pry out disc using non-metallic
instrument.
H. Remove bearing retainer snap ring, grease seal ring, and grease seal, spacer and bearing
cone from inboard side of wheel.
Effective: 12/17/03
6 -7