Creative Engineering ROCK-A-FIRE EXPLOSION - Page 97

The Arms and Shoulders Cont.
C. (See Drawing Page 3-065) Three styles of Arm Twist Actuation
Levers are used in the show. The oldest style is a steel block
with set screws in it. The block is drilled and pinned, using
a 1/8" or 3/16" Roll Pin. ';Phe next type is a clamp on type
that is also drilled and panned with a 1/8" or 3/16" Roll Pin.
The newest style is a clamp on type that need not be drilled
and pinned. If work is required on the Arm Twist movement, you
need to remove the shoulder assembly from the character.
1. Detach the arm raise cylinder from the front and rear
mounts and unscrew the E-Hinge attached to the arm mount
block that is welded to the chest.
2. Label the air lines and pull them from the Arm Twist
cylinder.
3. Place the disconnected arm on a chair to hold it. Bring the
shoulder assembly to the Technical Room.
D.
To replace or repair any parts connected with the Arm Twist
movement: (See Drawing Page 3-065)
1. To replace a broken Roll Pin, detach the Arm Twist
cylinder from the actuation lever (A).
a. Loosen the set screws in the actuation lever (A).
Align the holes through the lever (A) and the Twist
Shaft (B) .
b. Tap out the broken Roll Pin using a small pin and a
hammer.
c. Attempt to tap in a new Roll Pin the same size as the
one removed. If the hole is over size and the pin fits
in sloppy, drill the hole for the next size larger Roll
Pin. Align the holes, and re-drill the hole 1/64" below
the size of Roll Pin you are using. Note: If the hole
must be enlarged bigger than 1/4", It is suggested to
replace the Actuation Lever (A) and Twist Shaft (B).
2. If replacement of the Actuation Lever (A) is required, then
replacement of the Twist Shaft (B) is probably also
required. Remove the twist shaft from the assembly. Check it
for scars and bad gouges, replace if necessary.
3-060