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HEAD BOX STEPPER MOTOR / ROTARY VALVE ASSEMBLY
Required Tools:
• Phillips Screwdriver
• 5/16" Nut Driver
1 .
Unplug the support surface power cord from power source .
2 .
Unzip the support surface cover from the patient's left side of the support surface to the patient's right side .
3 .
Unplug the left or right CPR cord to deflate support surface .
4 .
Using the lift handle in the center of the bottom cover at the head, pull the head support surface towards the foot
end .
5 .
Pull the bottom cover towards the head exposing the head box .
6 .
Using a Phillips screwdriver, remove the six screws securing the head box top cover and remove the cover .
7 .
Unplug the stepper motor cable from the CPU board from connector TB10 and untie the two quick ties securing
the cables to the rest of the cables .
8 .
Hold the rotary valve assembly together while unplugging one hose at a time and plugging it in to the new valve into
the same locations, repeat on all five hoses . Using a 5/16" nut driver, remove the three nuts securing the stepper
motor / rotary valve assembly to the head box and remove .
9 .
Install the new stepper motor / rotary valve assembly and reverse the steps .
10 . Plug the support surface power cord into the power source and test the functionality before returning to service .
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Service Information
2950-109-005 REV B
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