QAL Medical 480, Service And Technical Manual

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Installation:
1. With the unit upside down, carefully place the bottom cover on the exposed frame.
2. Align the bottom cover’s holes with the holes in the top cover.
3. Insert the female halves of the plastic fastener into the holes from which they came and insert one male
half into each of the female halves.
4. With a small hammer gently seat the male halves of the fastners.
5. Reinstall the handle. Use one drop of Loctite #425 on each attachment screw.
2.2 Top Cover
Removal:
1. Remove bottom cover (refer to section 2.1).
2. Remove cradle (refer to section 3).
3. With the bottom cover and cradle removed, the top cover comes free.
Installation:
1. Place the top cover on top of the exposed base frame.
2. Install cradle (refer to section 3).
3. Install bottom cover (refer to section 2.1).
3 CRADLE (480/480E/480E PRO)
Removal:
1. Remove the bottom cover (refer to section 2.1).
3. Using a pair of diagonal cutters, remove the ty-rap that holds the kneepot cable secure to the base.
4. Remove the kneepot cable strain relief from the top cover by removing the underside nut.
5. Pull the kneepot cable gently through the hole in the top cover.
6a. (480)
Remove both 3/16" cradle pivot cap screws from the U-bracket assembly to detach the cradle from the
ballscrew. (If you run into difficulty removing the cap screw, apply a slight tilt to the Allen wrench and pull
the entire cap screw, threaded insert, and pivot sleeve straight out.
6b. (480E)
Remove the six cap screws that fasten the U-bracket and angle brackets to the sliders.
7. Lift the cradle through the top cover.
Installation:
1. Gently spread apart rubber track seals and slide cradle struts (480) or angle brackets (480E) between
the track seals through the top cover.
2a. (480)
Replace the slider blocks with new ones. Position the cradle strut between the slider blocks and the
U-bracket, and reinsert the spacer into the hole in the cradle strut. Place both pivot sleeves into their
proper locations. Apply one drop of Loctite #242 on the threads of each cradle pivot Allen bolt and using
a 3/16" hex key, install the two cap screws into the U-bracket assembly.
2b. (480E)
Replace the slider blocks if they are worn. On one side, line up the slider block, angle bracket, and
U-bracket and fasten them together with three of the cap screws passing through star washers. Repeat
on the other side.
3. Slide the kneepot cable through both the top cover and the base frame.
4. Reinstall the kneepot cable (refer to section 4.2)