Thrush Aircraft S2R-T660, Руководство по обслуживанию, Страница: 148 / 300

THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
Effective: 12/17/03
6 -9
3. When replacing a bearing cup, repeat step 1., and chill bearing cup in dry ice for a
minimum of 15 minutes.
4. Remove wheel half from source of heat and bearing cup from the dry ice.
5. Dry the chilled bearing cup and coat its contacting surfaces with zinc chromate
primer.
6. Install the chilled bearing cup into the bearing bore of the heated wheel half. Tap
bearing cup gently and evenly into place, using a fiber drift pin or suitable arbor
press.
G. Inspect wheel brake disc assembly for cracks, excessive wear or scoring, rust and
corrosion. Remove corrosion and blend out small nicks using fine (400 grit) sandpaper.
Replace brake disc if worn below wear limit of .537 inch (see Fig. 6-2). Coning of disc in
excess of 0.015 inch is cause for replacement of disc (see Fig. 6-3).
H. Inspect self-locking nuts for self-locking feature. Replace nuts if they can be turned onto
the bolt past the self-locking section by the finger.
REASSEMBLY AND INSTALLATION
(Cleveland Divided Type)
Tires and tubes are balanced as individual units and marked at the time of manufacture. The tire
balance mark is a red dot. The tube balance mark is a yellow stripe on the base of the tube. The
following procedure is suggested as a guide for mounting the tires in balance and installing the
wheels.
A. Reassemble cone bearings, grease seals, felts and snap ring into the proper wheel halves.
Lubricate bearings. See Inspection of Main Wheel Assembly.
B. Inflate tube sufficiently to round it out.
C. Dust tube with a small amount of tube talc.
D. Insert tube into tire so that balance mark (yellow or white band) is radically aligned with the tire
balance mark (red dot).
E. Place outer wheel half into tire and pull tube valve stem through valve hole.
F. Turn tire and wheel half over and place inner wheel half into the tire and align the boltholes with
the outer wheel half.
G. Place brakes discs into the inner wheel half and align boltholes.
H. Install bolts through the inner wheel half and washers and nuts on the outer wheel half.
I. Tighten nuts evenly and torque to 150 inch-pounds.
*** WARNING ***
Uneven or improper torque may cause Bolt or wheel failure.