Jersey Jack Pinball The Hobbit, Operation Manual

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Game Service & Troubleshooting E-4
Removing the Jaw Crank Link & Servo Horn
Tools Required:
#2 Phillips screwdriver
5/64" allen wrench
1)
Before disassembling or disconnecting anything, use tape or a felt tip marker to mark the position of one arm
of the star-shaped servo horn (as shown in black in figure E3). Make one mark on the arm itself, then one on the
Smaug main support bracket, next to the arm. You will need these marks to properly orient the servo horn when
you reinstall it later.
2)
While holding the jaw crank link (green in figure E3) firmly with one hand, use the 5/64" allen wrench to remove
the shoulder bolt holding the link to the servo horn. After the bolt is out, ensure that the marks you made on the
horn and bracket are still aligned.
3)
While firmly holding the servo horn, use the Phillips screwdriver to remove the screw that holds it on the servo
motor hub. To remove the servo horn, grasp it firmly and pull straight out, away from the servo motor.
IMPORTANT: DO NOT allow the motor hub/shaft to turn AT ALL as you remove the screw or the servo horn!
To reinstall the servo arm and reconnect the jaw crank link, perform the steps above, in reverse order. When
reattaching the servo horn, carefully align the marks you made in step 1) as you firmly press the horn back onto
the servo hub. Again, do not allow the motor hub/shaft to turn at all while the horn is removed or as it is being
reinstalled.
Preparations:
Disconnect and remove the Smaug Assembly
from the playfield and place it on a flat surface, using the bottom
of the stepper motor as a base. Remove the head/upper jaw, back
and gold pile sculptures from the assembly.
2
3
1
Figure E3. Smaug Assembly with most sculpture pieces removed.