Wheels And Brakes; Main Wheel Removal And Disassembly - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
F. Repack bearing cones with MIL-G-81322 (Aeroshell 22) grease or equivalent.
G. On each side of wheel; apply a thin coating of grease on bearing cups, installed
freshly repacked bearing cones, install flat grease seal ring, install felt grease
seal retainer with felt seal installed Note: Lightly saturate grease seal felts with
SAE 10wt. Oil (3-in-ONE oil) (do not soak), and carefully install snap ring. Install
the two- (2) P/N95435-11 spacers, one on each side of wheel assembly.
H. Install dust cover with center hole on opposite valve stem side of wheel.
I. Inspect tail wheel axle for anomalies, then apply a light coating of grease.
J. Install tail wheel/tire assembly onto tail wheel axle with valve stem side facing
outboard.
K. Install tail wheel axle castellated nut: While manually rotating wheel/tire, torque
axle castellated nut to 80 inch- pounds, continue rotating wheel and back off to
zero inch-pounds. While manually rotating wheel/tire, torque to 30 to 40-inch
pounds. Rotate axle castellated nut (clockwise or counterclockwise) to nearest
slot and cotter pin hole, and insert cotter pin. Bend ends of cotter pin around axle
nut. Note: Wheel/tire must rotate freely without perceptible play.
L. Carefully lower aircraft to ground and remove Jack.
M. Recheck tire inflation pressure (6.00-6 8pr is 55psi) and install dust cover
(hubcap).
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

To remove and disassemble a main landing gear wheel, proceed as follows:
A. Jack aircraft as outlined in Section 2.
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).
Effective: 5/25/05
AIRCRAFT MAINTENANCE MANUAL

WHEELS AND BRAKES

DIVIDED TYPE WHEEL (Cleveland)
6-9