Servicing; Measuring Brake Lining Wear And Brake Lining Types - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT INC – MODEL S2RHG-T65 TURBO THRUSH
K. Install valves core and inflate tires from 40 to 60 psi. Check to assure valve stem
does not leak before installing valve cap.
L. Lubricate washer and axle nut (see Section II Servicing). Install wheel assembly
on axle and secure with washer and axle nut.
M. While manually rotating wheel, 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.
N. Install hubcap and hubcap retaining ring.
O. 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.
P. 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 of
aluminum lacquer.
Do not paint working surfaces of the bearing cups.

MEASURING BRAKE LINING WEAR AND BRAKE LINING TYPES

(See latest edition of Cleveland Manual number AWBCMM0001-5 for pertinent details.)
Metallic or Non-asbestos Organic brake linings are used in different brake assemblies
on the Turbo Thrush. The minimum wear thickness for replacement of both metallic and
organic linings is 0.100 inch (2.54 mm) (refer to Fig. 6-2 & 2A). Note: Metallic and
Organic brake linings are not interchangeable, see next two paragraphs to properly
identify the two different type brake linings.
The metallic brake lining is a sintered metal composition and is attached by torque pins
which press fit into the back surface (steel carrier plate) of the lining. The holes for the
pins are not visible on the lining surface unless the lining is worn beyond its wear limit
(refer to Fig. 6-2a). Metallic brake linings are used with P/N 164-22202 brake disk that
are .562" nominal new, .537" minimum (worn out), this disk can be easily recognized by
it having 6 each out-gassing slots around its periphery.
The non-asbestos Organic brake lining is identified by its semi hard composition and
rivets used to attach the lining to the pressure plate or back plate. The rivet holes are
visible on the lining. (Refer to Fig. 6-2a) Organic brake linings are used with P/N 164-
05806 brake disk that are .425" nominal new, .395" minimum (worn out), this disk can
be easily recognized by it being a solid disk.
Once it is determined which type lining is being replaced, follow the appropriate
instructions listed below.
6-12
AIRCRAFT MAINTENANCE MANUAL
* NOTE *

SERVICING

Effective: 5/25/05