8700-0006-000 (Rev. 12) 08/2020
12
6/Service - Disassembly and Assembly
6.1 Service Tools and Equipment
CAUTION:
Use of lubricants other than recommended
may degrade plastic or rubber components.
The following items should be on hand during any service
procedure.
• Supply vacuum: 500 mmHg ± 10 mmHg (67 kPa ±
1.3 kPa) & 80 L/min open air flow minimum
• Supply Vacuum Regulator with Gauge, 760 mmHg
(101.3 kPa) Full Scale
• High Vacuum Calibration Gauge, 760 mmHg (101.3
kPa) Full Scale*(Ohio Medical P/N 6700-0352-800)
• 80 L/min Flowmeter
• Phillips Head Screwdriver, No. 2
• Flat Head Screwdriver, 1/4 inch
• Tubing Clamp
• Bubble Leak Tester
• Tweezers (Filter Remover)
• Wooden Tooth Pick (O-ring Remover)
• Phillips head screwdriver No.1
• Dow Corning
®
111 grease (Ohio Medical P/N 6700-
0074-200)
• Loctite
®
242 removable thread locker (Ohio Medical
P/N 0220-5016-300)
• Stop watch
• Open end adjustable wrench
•
10 L/min flowmeter
(*) Accuracy: ±1% of full scale deflection
6.2 Continuous Vacuum
Regulators (All Models)
6.2.1 Disassembly
WARNING: If the Vacuum Regulator is repaired or
disassembled in any manner, the Service
Checkout Procedure must be performed
before using the equipment on a patient.
WARNING: Clean and disinfect all suction equipment
if contaminated before disassembly to
ensure service personnel are not exposed to
hazardous contamination.
WARNING: When servicing a Low Vacuum Regulator,
perform the Vacuum Relief Valve Adjustment
and Low Vacuum Limit Setting Procedure.
CAUTION:
The gauge assembly must be handled with
utmost care to retain its precision. If the lens is
removed, do not rest the gauge on its face.
Note:
See Section 9.1 Illustrated Parts
1. Remove the four cover screws from the back of the
regulator.
2. With regulator facing up, carefully pull the cover
assembly off the back body.
3. To remove the gauge assembly, grasp the assembly
and pull straight out. The snap-fit lens can also be
removed (if applicable) for replacement.
4. Remove actuator and PTS assembly.
5. To remove the regulator module from the manifold
assembly, rotate the regulator module clockwise.
6.
Using tweezers, remove the filter. Replace with a
new filter.
7. Grasp the positive pressure safety relief valve, and
pull it from the back body.
8. Remove the mounting screws from the actuator
support bracket and remove the support bracket,
detent plate and selector switch.
9. Low models ONLY: Grasp the vacuum relief valve
and pull it from the back body.
6.2.2 Assembly
CAUTION:
To prevent stripping the plastic threads, place
the screw in the hole and turn counter-clockwise
until it drops into the original thread, then tighten
the screws.
1. Place the positive pressure safety relief valve in
position and push onto the back body.
2. Low models ONLY: Lubricate the vacuum relief valve
O-ring and install it in the valve housing.
3. Lubricate switch with a thin coat of Dow Corning
111 on the overmolded area. Place in manifold with
grease side down.
4. Add detent plate making sure the fingers are on either
side of the switch shaft and pointing down.
5. Place O-ring on post coming up through center of
detent plate and set actuator support bracket over
O-ring. Tighten down with 4 screws.
6. Place cylindrical white filter in corresponding cavity.
7. Screw regulator module counter-clockwise into
manifold.
8. Place PTS assembly in manifold directly below
regulator module.
