Eagle ICA-D212-725, Instructions Manual

Page: 427 / 729

ICA-D212-725 (63)
Page 100 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
63.7.3 Input Drive Quill
An input drive quill equipped with a freewheeling
coupling is located on the aft side of the
transmission main case. Engine torque is
transmitted through the main driveshaft to this
input quill, which drives the transmission gear
train. The freewheeling clutch in the drive quill
coupling operates automatically, engaging to allow
the engine to drive the rotor or disengaging the
stopped or idling engine during autorotational
descent.
TOOLS REQUIRED
T101308 Jackscrews
T101488 Wrench
Set
T101586 Pusher Set
63.7.3.1 Removal – Input Drive Quill
63.7.3.1.1
Open transmission fairing and
remove main driveshaft.
63.7.3.1.2 Disconnect
tube assembly (18,
Figure 63-45) from union (17) at lower side of
input quill.
63.7.3.1.3 Remove seven nuts from
mounting studs around flange of input quill.
Remove washers and clip (15).
63.7.3.1.4
Pull input drive quill from
transmission case by using T101308 jackscrews,
through three tapped holes in mounting flange.
Turn the three jackscrews evenly to keep quill
from cocking during removal.
63.7.3.1.5
Remove drain tube (10). Cover
mounting port to prevent accidental entry of
foreign objects into transmission.
63.7.3.2 Installation – Input Drive Quill
63.7.3.2.1
Uncover mounting port on aft side
of transmission case. Check that mating surfaces
of case and quill are clean. Inspect grooves
provided for packings (7 and 9, Figure 63-45).
Remove any burrs which might damage packings.
63.7.3.2.2
Remove cover from unused
mounting port at left side of transmission.
63.7.3.2.3
Cut a rubber plug (1/4 to 1/2 inch
thick) slightly larger than the diameter of the roller
bearing inner race on the inboard end of the input
pinion gear (8). Insert a cotter pin through center
of rubber plug and through a washer. Bend ends
of cotter pin back against washer and plug. Attach
a piece of light chain, or 1/8 inch nylon cord,
approximately two feet long, to the eye of the
cotter pin. (Refer to Figure 63-43).
CAUTION
RUBBER PLUG INSTALLATION PROCEDURE
IN STEP 63.7.3.2.4 MUST BE FOLLOWED TO
PREVENT DAMAGE TO BEARING.
63.7.3.2.4
Position the rubber plug in the
bearing, inside of the transmission, in such a
manner that the rollers are held against the
bearing outer race. Chain or cord will extend to
outside of transmission main case through left side
quill mounting port.
63.7.3.2.5
Install two new preformed
packings (9, Figure 63-45) on drain tube (10).
Lubricate packings with transmission oil (C-011)
and install drain tube (10) in hole provided in
transmission case.
63.7.3.2.6
Install two new preformed
packings (7) on quill sleeve assembly (11) in outer
grooves, leaving middle groove open for oil flow.
Lubricate packings and mating surfaces of sleeve
and case with transmission oil (C-011). Heat
mounting port in transmission case with a heat
lamp.
NOTE
Refer to BHT-205A1-CR&O for installation of
special input quill mounting studs. These studs
are required for use of T101586 pusher set.
63.7.3.2.7
Remove set screws from end of
quill mounting studs at one, five and nine o’clock