Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (63)
Page 132 of 144
CHAPTER 63 – MAIN ROTOR DRIVE SYSTEM (63-00-00)
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COPYRIGHT

2007 BY DART AEROSPACE LTD.

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
6
Date: 13.08.26
NUMBER NOMENCLATURE
Commercial 400 Grit Aluminum Oxide
Cloth
Commercial Chromic Acid Solution
MIL-C-5541
NOTE
Repair of the brake is limited to the replacement of
damaged parts and to the specific repairs listed in
this section and Figure 63-57, Detail A.
63.12.7.1 Clean nicks on pistons (21, Figure 63-
56), piston cavity (24) and throat with 400 grit
aluminum oxide cloth.
63.12.7.2 Replace any damaged fasteners.
63.12.7.3 Blend out nicks and burrs on shaft of
piston return pin (19). Pay particular attention to
the area around the cotter pin hole.
WARNING
CHROMIC ACID SOLUTIONS ARE CORROSIVE
AND POISONOUS. PROTECT THE EYES AND
HANDS. DO NOT BREATHE IN THE FUMES.
OBEY MANUFACTURERS INSTRUCTIONS.
63.12.7.4 Treat reworked surfaces of piston (21)
and exterior surfaces of brake assembly halves (5
and 11) with chromic acid solution MIL-C-5541.
63.12.8 Brake Assembly - Installation (P/N
9450103)
MATERIALS REQUIRED
Refer to BHT-ALL-SPM for specification and
source.
NUMBER NOMENCLATURE
C-405 Lockwire
NOTE
Ensure that microswitch is adjusted so that ROTR
BRAKE light illuminates when brake piston has
moved 0.030 inch (0.76 mm) from the original
position.
63.12.8.1 Install microswitch (8, Figure 63-55)
on inboard brake assembly half (5, Figure 63-56)
using screws (9, Figure 63-55) and washers (10).
63.12.8.2 Secure with lockwire (C-405).
63.12.8.3 Install inboard brake assembly half (5,
Figure 63-56) on rotor brake quill assembly (1)
using bolts (2) and washers (3).
63.12.8.4 Torque bolts (2) to 80 to 100 in-lbs
(9.04 to 11.30 Nm) and secure with lockwire (C-
405).
63.12.8.5 Install rotor brake disc (7).
63.12.8.6 Install
packings (22) in counterbored
cavities in mating surfaces of inboard brake
assembly half (5) and outboard brake assembly
half (11).
63.12.8.7 Insert brake oil transfer tube (14)
through packing (22) in inboard brake assembly
half (5) until it bottoms out in hole in brake
assembly half (5).
NOTE
Ensure that microswitch is adjusted so that
ROTOR BRAKE light illuminates when brake
piston has moved 0.030 inch (0.76 mm) from the
original position.
63.12.8.8 Install microswitch (8, Figure 63-55)
on outboard brake assembly half (11, Figure 63-
56) using screws (9, Figure 63-55) and washers
(10).
63.12.8.9 Secure with lockwire (C-405).
63.12.8.10 Place brake assembly spacer (23,
Figure 63-56) over protruding oil transfer tube (14)
in inboard brake assembly half (5).
63.12.8.11 Ensure holes for bolts (12) in brake
assembly spacer (23) align with corresponding
holes in inboard brake assembly half (5).
63.12.8.12 Install outboard brake assembly half
(11) on inboard brake assembly half (5) using
bolts (12) and washers (13).