7.2.2 Assembly. Ohio Medical Pediatric ISU, ISU

7/Service - Disassembly and Assembly

7. Remove the timing valves by pulling the valve stem out of the backplate. Replace the filters if required.

Note: To disassemble the timing valves, refer to

Section 7.4 Timing Valves.

8. If the mode selector switch needs service, carefully unscrew the center retaining screw while holding the main valve body. Remove the washers, detent plate, ball bearings, and valve body. Replace

O-rings if required.

9. Remove the gauge bleed hole filter from the backplate. Replace if required.

10. Remove the flow control valve by turning counterclockwise until it is out of the backplate.

11. For the Adult ISU - Remove the ISU mounting plate by removing the four screws and pulling the plate and gasket from the backplate. Replace gasket if required.

12. For the Pediatric ISU a. Remove the Pediatric ISU mounting plate by removing the four screws and pulling the plate and gasket from the backplate.

b. Replace gasket if required. Use Pediatric ISU gasket ONLY (6700-0221-500) c. To remove valves, grasp top of valve and pull. Replace positive pressure relief valves if required. d. Under the suction control knob there is a brass stud and a retaining ring. DO NOT remove these parts from the cover assembly.

7.2.2 Assembly w CAUTION: To prevent stripping the plastic threads, place the screw in the hole and turn counter-clockwise until it drops into the original threads, then tighten the screw.

1. Lubricate all O-rings and the gasket with a small amount of Dow Corning ® 111 grease before assembly.

2. For the Adult ISU - Place the lubricated mounting plate gasket onto the holes and install the mounting plate onto the backplate. Ensure the protruding posts on the mounting plate align in to the backplate properly.

3. For the Pediatric ISU - Install new positive pressure relief valves by pulling tail of valve through the small hole on the mounting plate. When installed, the three other vent holes should be covered. After valve is installed, clip the tail. Place the lubricated mounting plate gasket onto the backplate. Ensure the protruding posts on the mounting plate align into the backplate properly.

4. Install the flow control valve into its proper location.

Use the proper tool to rotate the valve clockwise approximately 3 full turns, taking extra care to ensure that the threads are engaged properly.

5. Place the gauge bleed hole filter into its proper location. Push until it bottoms on the backplate.

6. Mode Selector Switch Assembly a. Place the four selector switch O-rings into their proper location on the backplate. b. Install the main valve body on the backplate post with the protruding ear at the 3 o’clock position. Ensure the valve body seats on the four O-rings. c. Place the four ball bearings on top of the valve body. Place the detent plate on top of the four ball bearings (smooth side down). Place the spiral spring washer on top of the detent plate. Place the flat washer on top of the spiral spring washer.

d. Install the screw through the washer and into the backplate post. Tighten the screw.

7. Grasp the main valve body and rotate the switch in all three positions. Ensure that the protruding ear is near the 3 o’clock position after testing the switch.

8. Install the timing valves into their proper locations and push fully in so that the O-rings seats in the backplate.

9. Install the Unilogic Module by aligning the silastic tubes with the ports on the backplate and push fully in.

10. Install the regulator module into its proper location.

Rotate the module so that the protruding ears are at the 5 o’clock and 11 o’clock positions.

11. Install the snap-fit lens by placing one of the retaining tabs over the edge of the gauge face, and then pressing lightly until the other tab snaps onto the gauge face. Rotate the lens to confirm proper installation. If the lens is not the snap-fit type, simply place the lens onto the gauge ensuring it rotates easily and is resting properly.

12. Install the gauge assembly into its proper location so that the O-rings seat fully. Ensure the gauge is properly aligned. For the Pediatric ISU ONLY -

The suction control knob is NOT lockable.

16 6700-0082-000 (Rev.4) 10/2012