Dynon Avionics Servo Arm/Capstan User Manual
Page 2
DYNON AVIONICS
101156-001 – Rev A
2
The autopilot safety shear screw should NEVER be removed or adjusted during this
procedure. If the shear screw has broken/damaged and needs replacement, there is
specific documentation available for this purpose at
Fig 2
Reassembling the Arm/Capstan Stack
Reverse the disassembly steps to install the remaining hardware. See Figure 2. Assembly order
is:
1. Servo Arm/Capstan
2. Nylon Washer
3. Wave Washer
4. Castle Nut (AN310-5)
5. Cotter Pin (MS24665-210)
Tighten the castellated nut finger tight, and then using a Torque Wrench, tighten until a slot
in the nut lines up with the hole in the shaft for the cotter pin. DO NOT EXCEED 4.5 in-lb (72
in-oz) torque on castle nut. Exceeding this torque specification will affect the yield torque
of the safety shear screw, compromising the safety-enhancing intent of its design.
Install a new cotter pin, MS24665-210, following the standard method of trimming and
bending the pin legs.
Servo arm/capstan rotation should be smooth. No movement should be observed between the
arm/capstan and the attachment disc as described earlier.
1. Servo Arm
2. Flat washer
3. Wave washer
4. Castle nut
5. Cotter pin