Van's Aircraft RV-12, Maintenance Manual

Page: 76 / 217

Rev. 6
5-20
3. Remove the Lock Clips from one of the cable tensioners.
4. Rotate the tensioning barrel to slacken the stabilator control cables.
5. Disconnect the stabilator control cables.
6. Disconnect the aft end of the Trim/Servo Pushrod from the Anti-servo Tabs.
7. Remove the two bolts attaching the counter balance arm to the stabilator.
8. Remove the two bolts attaching the stabilator to the aft end of the tail cone.
9. Remove the stabilator assembly. Note: while extracting the counterbalance arm
from the fuselage, rotate the counter balance arm 90 degrees to allow it to pass
through the aft tailcone bulkhead.
Bearing Replacement
10. Pressing out the bearing: Position the sockets on each side of the bearing then
use the nut, washer and bolt inserted through both sockets and the bearing. Tighten
the nut on the bolt to press the bearing towards the large socket. See Figure 16 .
Figure 16: Extracting the DW4K2X bearing
11. Carefully clean the new bearing and the inner bore of the VA-146A Flange
Housing using denatured alcohol. After cleaning, handle the bearings with care as to
not re-contaminate the outer surface.
12. Insert a bearing into the VA-146A Flange Housing with minimal engagement just
far enough that the bearing aligns itself with the center hole in the flange.
13. Place a bead of Loctite 648 onto the outer surface of the bearing around the
entire circumference next to the edge of the VA-146A Flange Housing.
14. Pressing in the bearing: Using the same process as removing, use the small
socket to press the bearing towards the large socket and into the VA-146A Flange
Housing until the bearing is flush on both sides. Allow the Loctite sufficient time to
cure per instructions on the package.
15. After reinstalling the stabilator readjust the stabilator control cable tensions in
accordance with the KAI and install new lock clips on the adjuster barrel.
■ CAUTION: B
E SURE TO RE
-
ORIENT THE COUNTERBALANCE ARM SO THAT THE
COUNTERBALANCE WEIGHT IS POSITIONED CORRECTLY
. R
EFER TO
KAI