Stryker Medical 1050, Maintenance Manual

Page: 28 / 108

Service Information
23
GATCH LIFT MOTOR/ACTUATOR REPLACEMENT
Required Tools:
7/16” Socket Ratchet 1/4” Socket or Wrench
Inclinometer 5/16” Socket 5/64” Allen Wrench
3” Extension Medium Standard Screwdriver 1/2” Wrench or Socket
1/2” Socket 5/32” Wrench (2) 7/16” Wrenches
String or Cord Sawhorse (or equivalent)
Procedure:
1. Unplug the stretcher power cord from the wall socket. Properly ground yourself (see page 18).
2. Using a 1/2” wrench and socket, remove the bolts holding the Gatch motor assembly to the Knee Gatch
mounting bracket underneath the litter midsection.
3. 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.
4. Manually crank up the Fowler (head end) to expose the quick drop lever assembly. Remove and save the
small black cap from the end of the quick drop release cable. With two 7/16” open end wrenches, loosen
the nut on the cable retainer until the quick drop release cable will slide out. Using a 5/64” Allen wrench,
loosen the set screw securing the cable cover at both ends of the cable and pull off the cable cover.
5. Using a 7/16” wrench, remove the two inner nuts and bolts fastening the Gatch motor to the mounting brack-
ets inside the motor enclosure. Only the two inner bolts need to be removed.
6. Using a 5/16” socket and extension, remove the two bolts from the bottom mounting bracket under the
actuator assembly inside the motor enclosure.
7. Unplug the black Gatch motor cable from the logic circuit board.
8. Support the foot end of the stretcher using a sawhorse or the equivalent. Using a 1/2” wrench or socket,
remove the bolt holding the litter support tube on top of the jack to the litter roller assembly and swing the
litter support aside. Using a 7/16” socket, remove the bolt holding the foot section to the Gatch motor tube
and pivot the foot section completely back.
9. Remove the Gatch motor.
10. Reverse steps 2–8 to install the new Gatch motor.
11. Plug the stretcher power cord into a properly grounded wall socket and use the siderail control to raise
the Gatch until the motor stops.
12. Using an inclinometer, verify the Gatch is at a 30
_
angle. If it is not, run the motor until a 30
_
angle is
achieved, then disconnect the motor from the Gatch mounting bracket and quick drop release cable.
13. Using the siderail controls, run the motor up, allowing the motor to spin freely, until it stops.
14. Reattach the motor to the Gatch mounting bracket and quick drop release cable and verify the Gatch is
now at a 30
_
angle. Run the Gatch fully down and verify it reaches the full down position. If the motor
stops before the Gatch is fully down or continues to run after the Gatch is resting on the rubber Gatch
stops, see page 24 for limit switch adjustment.