Stryker Medical 1050, Maintenance Manual

Page: 29 / 108

Service Information
24
FOWLER AND KNEE GATCH MOTOR/ACTUATOR ADJUSTMENT
Procedure:
1. Electrically raise the Fowler and/or Knee Gatch until it stops. Use an inclinometer to check the angle of
the Fowler/Knee Gatch. If the angle is not 70
_
– 80
_
for the Fowler and 28
_
– 30
_
for the Gatch, the actua-
tor(s) will need to be adjusted.
2. Lower the Fowler down flat and remove the socket head cap screws and spacers holding the drive bar to
the crankscrew/actuator assembly.
3. Standing at the head end of the bed, turn the outer drive tube clockwise if the Fowler angle is less than
70
_
. Turn the outer drive tube counterclockwise if the Fowler angle is more than 80
_
. Reattach the drive
bar to the crankscrew/actuator assembly. Electrically raise the Fowler fully and check the angle.
4. If the Knee Gatch angle is not correct, disconnect the pivot bolt from the Gatch. Standing at the head end
of the bed, turn the drive tube clockwise if the Gatch angle is less than 28
_
. Turn the drive tube counter-
clockwise if the Gatch angle is more than 30
_
. Reattach the drive bar to the crankscrew/actuator assem-
bly. Electrically raise the Gatch fully and check the angle.
NOTE
One turn of the drive tube is equal to approximately 2
_
of Fowler/Gatch angle.
5. After the Fowler and Gatch upper limits are set properly, rotate the quick drop release lever to lower the
Fowler and Gatch. Press and hold the Fowler and Gatch down buttons until the motor stops to reset the
quick drop Fowler and Gatch. The Fowler and Gatch should stop on the rests. So there isn’t any tension
on the actuators, you should be able to pull up slightly on the Fowler and Knee Gatch. See the procedure
below for limit switch adjustment if the Gatch limits are not properly set.
FOWLER AND KNEE GATCH LIMIT SWITCH ADJUSTMENT
Procedure:
1. If the motor does not stop when the Fowler or Gatch reaches the full down position or stops before the
Fowler or Gatch is fully down on the rests, the limit switch needs to be adjusted.
2. Lower the Fowler and/or Gatch to the full down position being careful not to exceed the downward limit
on the rubber stops.
3. Raise the Fowler/Gatch approximately 1”. Rotate the quick drop release lever and run the Fowler/Gatch
motor down to reset the quick drop.
4. Lift the foot section and pivot it back, securing it with a string or cord. Using a 5/32” Allen wrench, remove
the four screws and two Knee Gatch guides from the sides of the motor/board enclosure cover. Using a
standard screwdriver, remove the two sheet metal screws holding the cover to the foot end frame tube
and remove the cover.
5. Using a 1/4” wrench, remove the two screws on the end of the actuator holding the round limit switch cover
plate and remove the plate to expose the limit switches.
6. Loosen the two screws on the outer limit switch cam and turn the cam by hand until it just contacts the
limit switch. The switch will click when the cam contacts it.
7. Tighten the screws on the cam.
8. Raise the Fowler/Gatch fully. Rotate the quick drop lever and hold down the lowering button on the siderail
to reset the quick drop. The Fowler/Gatch should lower fully down on the rests and the motor should stop.
If it doesn’t, repeat steps 6 through 8.
9. Reattach the switch cover plate and motor enclosure cover when the switch is set properly.