Maintenance Procedures Chapter 4
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9. Using a no. 3 Phillips screwdriver, remove the six screws (A, fig. 4.3C, page 35) holding the
plastic cover to the foot end casing. Grasp both ends of the cover, move them apart to
disengage the inside clips from the round accessory brackets and remove the cover.
10. Using a no. 2 Phillips screwdriver, remove the four screws (B, fig. 4.3C, page 35) holding the
protective plate to the foot end casing.
11. Properly ground yourself (see section 1.4).
12. Using cutting pliers, clip the cable tie holding the head actuator cable to the other cables, if
applicable.
13. Remove the actuator cable (connector J8) from the control board.
14. Using pliers, squeeze the upper part of the strain relief bushing (B) and lift it up to remove it
from its location.
15. Remove the cable from the bushing and pass the cable connector through the rear casing
hole.
16. Using a 5/16" socket wrench, remove the two screws (C) holding the retaining plate to the
actuator support.
17. Remove the two pivot pins (D) holding the actuator to the support. To facilitate the removal
of the pins, insert a small slotted head screwdriver into the opening at the end of the
actuator and push out the pins.
18. Move the actuator toward the centre of the bed to remove it from its location.
19. Reverse the above steps to install the new actuator. Take note of the following caution
before hooking up the actuator tube to the head section lever arms.
It is of utmost importance that the course of the new head actuator be adjusted before
hooking up its tube to the head section lever arms. An improper adjustment can damage the
head section structure.
17. To adjust the course of the replacement head actuator, proceed as follows:
A. Make sure that the actuator cable is connected to the control board and connect the
bed power cord.
B. Grab the new actuator tube and position its holes horizontally. While holding the tube
firmly to prevent it from rotating, press the Fowler up control for a few seconds and
then press the down control until the actuator stops. This will be the lower limit of the
actuator course.
C. Gently turn the tube in either direction to align the tube holes with those of the head
section lever arms. Then raise again the Fowler a few inches while holding firmly the
tube and lower it completely.
D. Check the alignment of the holes. If the tube holes are not aligned any more with those
of the lever arms, repeat steps B and C until they are. Once the holes aligned, install
the washers and the clevis pin. Slightly raise the head section manually to ease the
insertion of the clevis pin.
E. Before installing the rue ring cotter to finalize the head actuator replacement, raise and
lower completely the Fowler. Check that the actuator stops working as soon as the
head section reaches the frame.
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