ultracomfort Power Recline UC551-L, Service Manual

Page: 10 / 94

10
Back Assembly Replacement (500-lb. and 3-position)
Tools needed: 7/16 inch socket wrench
1. Press the Down Button on the hand control until the
footrest is about parallel to the floor.
2. Unplug the transformer from the wall
outlet.
3. Using the 7/16 inch socket wrench, remove the two (2)
flange lock nuts located on both sides of the back.
4. Pull the back flap away from the Velcro.
5. Work the back assembly out one side at a time pulling the
threaded studs out of the scissor mechanisms.
6. Install new back.
Control Box Replacement (500-lb. only)
Tools needed: wire cutters, replacement zip ties, and a chair stand.
1. Unplug the transformer from the wall outlet.
2. Gently push the chair over onto the footrest, turn it upside down
or, gently push it over onto its side, opposite of the hand control.
3. Unplug the motor(s), hand control extension, and battery backup
from the control box.
4. Cut the wire ties that fasten the control box to the lift frame
and remove it.
5. Use wire ties to fasten a new control box onto the lift frame.
6. Plug the motor(s), hand control extension, and battery backup
into the new control box.
7. Gently turn the chair back over.
8. Plug the transformer into the wall outlet and test.
Lift Motor Replacement
Tools needed: needle nose pliers, zip ties, and a chair stand.
1. Unplug the transformer from the wall outlet.
2. Gently push the chair over onto the footrest, turn it
upside down or, gently push it over onto its side,
opposite of the hand control.
3. Unplug the motor(s). For (540M-26, 542M-26, 542-ME6,
550-M26), unplug the motor(s) from the control box.
4. Remove the hitch pin and the clevis pin that
fastens the bottom of the motor(s) to the lift frame.
5. Remove the hitch pin, the clevis pin, washers,
and spacers that fasten the top of the motor(s) to
the recline straps.
6. Use the hitch pin and clevis pin to fasten the bottom of
the new motor to the lift frame.
7. Use the hitch pin, clevis pin, washers, and spacers to fasten the top of the lift motor to the
recline straps.
8. Connect the new motor(s). For (540M-26, 542M-26, 542-ME6, 550-M26), connect to the control
box.