Dräger Narkomed 2C Technical & Service Manual page 44

REPLACEMENT PROCEDURES (continued)
NOTE:
4.4.13A For the cylinder pressure gauges:
4.3.13B For the pipeline pressure gauges:
4.4.14 If a cylinder pressure gauge was replaced, perform the following leak
test:
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Intermediate assemblies may need to be removed to allow
access to the gauge connections and mounting hardware.
Be sure to keep a record of the disassembly sequence so
that all tubing can be correctly re-assembled.
Disconnect the compression fitting at the back of the gauge.
Remove the gauge mounting nuts, and remove the gauge from
the front of the panel.
Install the replacement gauge in the panel using the flat
washers, lock washers and mounting nuts that were previously
removed.
Connect the gas line to the gauge and tighten the compression
fitting.
Locate the flexible tubing connecting the gauge to the pipeline
inlet assembly, cut the tie-wrap tubing clamp at the pipeline
inlet and disconnect the tubing.
NOTE: On later machines that have brass fittings instead
of nylon, the flex tubing is attached with a press-
on hose clamp instead of a tie strap.
Remove the gauge mounting nuts, and remove the gauge from
the front of the panel.
Cut the tie-wrap tubing clamp and disconnect the flexible tubing
from the gauge.
Connect a new 7-inch length of tubing (8-inch for the air pipeline
pressure gauge) to the replacement gauge and secure it with a
new tie-wrap clamp.
Place the gauge in the panel and secure it with the flat washers,
lock washers and mounting nuts that were previously removed.
Connect the other end of the flexible tubing to the pipeline inlet
assembly and secure it with a tie-wrap clamp.
4-14
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NM2C
Rev. B