REMOVE AND REPLACE OR REPAIR DEFECTIVE COMPONENTS
OF ANESTHESIA APPARATUS
Field repairs are usually limited to the replacement of worn or damaged parts.
The following procedures for removing and replacing or repairing defective components
of the Ohmeda field anesthesia apparatus are examples of the methods to use to correct
common malfunctions. Once you have isolated a malfunctioning component, you should
use your knowledge of the anesthesia process gained in Lesson 1 and the specific
procedures discussed in this lesson to correct it. You must correct malfunctions before
returning the anesthesia apparatus to service. For further information on removing and
replacing or repairing malfunctioning components of the anesthesia apparatus, refer to
the manufacturer's service literature or the manufacturer's service representative. This
lesson covers the repair of the flow control valves; the replacement of the flow meter
tube, scale, and float; and the replacement of the check valve disc.
Never oil or grease any anesthesia oxygen equipment unless you use a
lubricant made and approved for this type of service. In general, oils and
greases oxidize readily and, in the presence of oxygen, they will burn
violently. Vac Kote is the recommended oxygen service lubricant.
Never cover the anesthesia apparatus with any type of fabric or plastic
covering. Removing the cover may cause static electricity and the
possibility of a fire or explosion.
REPAIR FLOW CONTROL VALVES
If you have closed the cylinder valves during leak test number 2 and the flow
meter still indicates a flow, you can isolate the malfunction to the flow control valve. You
must repair the flow control valve. Refer to Figure 3-6, Control head - flow meters.
Frequently, you can repair a leaking needle valve on the flow meter without replacing
any parts. Use the following steps to attempt to correct the problem.
a. Loosen the two screws in the knob.
b. Remove the knob.