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REPLACEMENT PROCEDURES (continued)
4.1
Cylinder Yoke Assemblies
Each cylinder yoke contains a replaceable filter and check valve assembly.
Replacement of this assembly requires that the yoke be removed from the
anesthesia machine. Figure 4-1 shows a typical cylinder yoke mounting
arrangement. Access to the yoke mounting screws and gas line connection
requires that the table top be removed from the machine.
4.1.1
Disconnect all pipeline hoses and set the System Power switch to ON.
4.1.2
Close all cylinder valves except the O
4.1.3
Set the oxygen flow to 5 liters per min.
4.1.4
Open the other gas flow control valves to drain pressure from the
system.
4.1.5
Close the O
the O
4.1.6
Set the System Power switch to STANDBY.
4.1.7
Remove the cylinder where the yoke is to be replaced.
WARNING: Store the cylinder in a safe place and lay it on its side.
4.1.8
Remove the screws holding the table top to the machine and lift out
the table top.
4.1.9
Pull the writing or keyboard tray out to its fully extended position.
4.1.10
Disconnect the gas line fitting at the yoke and remove the two yoke
mounting screws.
4.1.11
Remove the filter and check valve assembly from the yoke and install
a replacement assembly.
If the entire yoke assembly is being replaced, ensure that the
replacement yoke has the correct label and pin indexing arrangement.
NOTE: If the yoke spacer is removed from the frame rail of the machine, be
sure to re-install it in its original position.
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cylinder valve, and close the flow control valves. Press
2
Flush valve to drain oxygen pressure from the system.
2
4-2
valve.
2
NM3
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