Service Information
78
HEAD MOTOR DRIVE SCREW AND BALL NUT REPLACEMENT
Required Tools:
Large Snap−Ring Pliers 3/8” Socket Wrench
B
A
C
D
(standard length bed actuator
assembly shown)
Procedure:
1. Run the bed fully up. Unplug the bed power cord from the wall socket.
2. Using a 3/8” socket wrench, remove the two bolts holding the motion interrupt pan to the litter and remove
the pan.
3. Remove the head motor (see page 76) for access to the screw and ball nut.
4. Remove the head motor drive isolator and CPR decoupler (see page 77).
5. Using needle−nose pliers, remove the cotter pin holding the clevis pin to the drive screw ”wing” (A).
6. Remove the clevis pin and slide the wing and tapered roller bearing off the drive screw.
7. Using a 3/8” socket wrench underneath the litter, remove the screw holding the cam retention wire (B)
to the ball nut assembly.
8. Using a 3/8” socket wrench, remove the two bolts holding the ball screw support bracket (D) to the bottom
of the litter and remove the bracket.
9. Using large snap ring pliers, remove the snap ring holding the ball nut to the bracket (C).
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