ICA-D212-725 (63)
Page 34 of 144
CHAPTER 63 – MAIN ROTOR DRIVE SYSTEM (63-00-00)
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
oil lines for leaks. If main input quill is leaking,
replace seal (paragraph 63.7.4.1 to 63.7.4.2).
63.4.5.2.11
Inspect transmission for
mechanical and corrosion damage (BHT-212-
CR&O).
63.4.5.2.12 Inspect
transmission
electrical
wiring for secure installation and damaged wires.
63.4.5.2.13
If installed, inspect main rotor
mast (paragraph 63.3.2.2).
63.4.5.3 Installation
SPECIAL TOOLS REQUIRED
NUMBER NOMENCLATURE
T101581
Maintenance hoist or
equivalent
CAUTION
WHEN REPLACING TRANSMISSION FOR
INTERNAL FAILURE OR METAL PARTICLES IN
OIL, CLEAN ALL OIL LINES AND REPLACE OIL
COOLER, EXTERNAL OIL FILTER, AND
PERFORM MAST OVERHAUL.
63.4.5.3.1 Check
condition of pylon mounts,
and repair or replace any unserviceable parts.
NOTE
If mast assembly is not installed, transmission can
be hoisted using cover and lift plate assembly
(204-040-929-029 or 204-040-929-101).
63.4.5.3.2
Install mast assembly, if removed
(paragraph 63.3.2.3).
63.4.5.3.3
Erect T101581 maintenance hoist,
or provide other suitable hoisting equipment.
Attach hoist to mast nut on top of mast.
63.4.5.3.4
Lift transmission from stand.
Lower carefully to position on four main mount
bolts, meanwhile guiding lift link into mounting
points on transmission support case.
63.4.5.3.5
Install lift link.
63.4.5.3.6
Install a retaining bolt (3, Figure
63-11) with a countersunk washer and a large
shouldered washer (4), into top of each of four
main mount bolts (7). Torque retaining bolts 90 to
105 foot-lbs. (122 to 142 Nm).
NOTE
Ensure countersunk side of washer is toward
bolthead.
63.4.5.3.7
Install fifth mount support (6) with
bolts on aft side of pylon support. Attach fifth
mount eyebolt (5) with bolt assembly (2), washer,
and nut. Torque nut 300 to 400 inch-lbs. (33.90
to 45.19 Nm). Secure with cotter pin.
NOTE
If necessary for alignment, peel laminated filler
plates under fifth mount. Alignment must allow
installing bolt without moving transmission
vertically. The transmission will have to be moved
laterally.
63.4.5.3.8
Install main rotor, stabilizer bar,
and connect rotating controls (Chapter 62).
63.4.5.3.9
Install forward tail rotor driveshaft
(Chapter 65).
63.4.5.3.10
Install main driveshaft (paragraph
63.2.1.4).
63.4.5.3.11 Install
hydraulic pumps on drive
pad at right side of transmission sump case and
on forward drive pad of transmission main case
(Chapter 29).
63.4.5.3.12
Install tachometer generator.
63.4.5.3.13 Connect
transmission
electrical
harness cable at connector on right side of pylon
support.
63.4.5.3.14
Connect oil outlet and inlet hoses
(Figure 63-15).
63.4.5.3.15
Connect oil drain line to sump.
63.4.5.3.16
Install rotor brake assembly and
Содержание ICA-D212-725
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