Great Planes CAP 232 1.60 ARF - GPMA1410 - Manual (Page 9)

and aligning it with the servo. Mark the location for the screw
holes. Drill pilot holes in the marks you made with a 1/16"
[1.6 mm] drill bit, being careful not to drill through the
aileron. Secure the control horn to the aileron with four #4 x
1/2" [13 mm] screws. Remove the screws, harden the holes
with thin CA, and then reinstall the screws.
❏ ❏
4. Align the pushrod with the clevis on the control horn
and make a mark using permanent marker or Panel Line
Pen where the pushrod extends 1/8" [3 mm] into the open
area of the clevis. Trim the 4-40 rod to length.
❏ ❏
5. Remove the clevis and pushrod assembly from the
servo and the solder clevis from the control horn.
❏ ❏
6. Attach the solder clevis to the pushrod using the
expert tip at the end of this section.
❏ ❏
7. Reattach the pushrod assembly as shown. Be sure
to slide the silicone retainers over the clevises.
HOW TO SOLDER
❏
A. Use denatured alcohol or other solvent to thoroughly
clean the pushrod. Use coarse sandpaper to roughen the
end of the pushrod where it is to be soldered.
❏
B. Apply a few drops of soldering flux to the end of the
pushrod. Position the clevis so that 1/8" of the pushrod
protrudes into the open area of the clevis.
❏
C. Simultaneously heat the clevis and pushrod. Apply silver
solder (GPMR8070) to the joint. The heat of the parts being
soldered should melt the solder, thus allowing it to flow.
❏
D. Immediately after the solder has solidified, but while it
is still hot, carefully use a cloth to quickly wipe off the flux
before it hardens. Important: After the joint cools, coat with
oil to prevent rust. Note: Do not use the acid flux that comes
with silver solder for electrical soldering.
❏
E. This is what a properly soldered clevis looks like; shiny
solder with good flow, no blobs, flux removed.
❏
8. Repeat steps 1-7 for the other aileron servo.
9