Maintenance Manual
32
KNEE GATCH ACTUATOR REPLACEMENT
Required Tools:
Long Nose Pliers No. 2 and 3 Phillips Screwdrivers Pliers
Cutting Pliers Bungee Cord 5/16" Socket Wrench
Small Slotted Head Screwdriver
Procedure:
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Unless otherwise indicated, refer to figure 4.3B on page 30 for the illustration of this procedure
reference points.
1. Raise the bed fully up and apply the brakes. Flatten the mattress support.
2. Unplug the bed power cord from the wall outlet.
3. Raise the siderails.
4. If applicable, remove the foot and head section plastic covers (optional).
5. Lift and fold the foot section back toward the head end of the bed. Secure it to the bed using
a bungee cord.
6. Using long nose pliers, remove the rue ring cotter/washers/clevis pin (E) linking the actuator
tube to the thigh section lever arms.
7. 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.
8. 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.
9. Properly ground yourself (see section 1.4).
10. Using cutting pliers, clip, if applicable, the cable tie holding the thigh actuator cable to the
other cables.
11. Remove the actuator cable (connector J9) from the control board.
12. Using pliers, squeeze the upper part of the strain-relief bushing (F) and lift it up to remove it
from its location.
13. Remove the cable from the bushing and pass the cable connector through the casing hole.
14. Using a 5/16" socket wrench, remove the two screws (G) holding the retaining plate to the
actuator support.
15. Remove the two pivot pins (H) 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.
16. Move the actuator toward the centre of the bed to remove it from its location.
17. Reverse the above steps to install the new actuator. Take note of the following caution
before hooking up the actuator tube to the thigh section lever arms.
It is of utmost importance that the course of the new thigh actuator be adjusted before
hooking up its tube to the thigh section lever arms. An improper adjustment can damage the
thigh section structure.
17. To adjust the course of the replacement thigh actuator, proceed as follows:
A. Make sure that the actuator cable is connected to the control board and connect the
bed power cord.
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