Stryker Medical 2025, Maintenance Manual

Page: 26 / 140

Maintenance Procedures – Litter
25
FOWLER POTENTIOMETER REPLACEMENT
Required Tools:
#2 Phillips Screwdriver Wire Cutters 1/2” Open End Wrench
7/64” Allen Wrench
Replacement Procedure:
1. Manually crank the knee section up until it stops.
2. Using a #2 Phillips screwdriver, remove the four screws holding the litter access cover to the litter and
remove the cover.
3. Using a 7/64” Allen wrench, loosen the screw holding the linkage to the pot. shaft and remove the linkage
from the shaft.
4. Using a 1/2” open end wrench, remove the nut holding the potentiometer to the frame.
5. Using wire cutters, remove the cable ties from the cable. Unplug the cable from the CPU and remove the
pot.
6. Reverse the above procedure to install the replacement potentiometer.
7. The new potentiometer must be calibrated after it has been installed.
8. The Fowler pot. should be set at 150 ohms (
$
10 ohms) in the full down position. This reading must be
taken from pins 3 and 4 on the connector with the pot. unplugged from the board. After the correct ohm
reading is achieved, tighten the screw on the linkage.
9. Press and hold the “Knee Lockout” and “Bed Motion Lock” buttons on the foot board.
10. Plug the power cord into the wall socket. Release the two buttons and the “Knee Lockout” LED should
be flashing. This indicates the bed is in the correct calibration mode.
11. Using the foot board controls, run the Fowler up to 90
_
. Press and hold the button on the foot board to
lock out the siderail controls for the back until the padlock LED flashes. Release the button.
12. Using the foot board controls, run the Fowler down to 0
_
. Press and hold the button on the foot board
to lock out the siderail controls for the knee until the padlock LED flashes. Release the button and unplug
the bed power cord to complete the “burn in” mode.
13. Plug the bed power cord into the wall socket and verify the back limits are set properly before returning
the bed to service.
FOWLER CYLINDER REPLACEMENT
Required Tools:
7/16” Box End Wrench 7/16” Socket Wrench
Replacement Procedure:
1. Crank the Fowler up until it stops.
2. Using a 7/16” socket wrench, remove the bolt holding the cylinder to the frame.
3. Using a 7/16” socket wrench and a 7/16” box end wrench, remove the nut and bolt holding the cylinder
to the Fowler link. Remove the cylinder.
4. Reverse the above procedure to install the replacement cylinder.