Repair information and repair instructions 23
3. Remove the coupling:
– Unscrew the Walther coupling using an
open-ended spanner (SW 14). As the
coupling is secured with Loctite 245, this
will take a little strength.
– If your Module is equipped with an AGA
coupling, unscrew it using the open-ended
spanner (SW 19).
4. Remove any adhesive residue from the thread
surfaces:
– Clean the outer thread with a brass brush.
– If necessary, re-cut the inner thread (G 1/8).
– Blow out the residue in the pneumatic block
with oxygen via the tube connection of the
main supply.
5. Join the two halves of the housing together
(see “6.2.4 Assembling the housing” on
page 16).
6. Perform a final check (see “3. Final Check” on
page 7).
6.2.10 Replacing O-ring of Walther coupling
1. Lift the faulty O-ring 50 out of the coupling.
2. Insert the new O-ring 50 in the coupling so that
the O-ring is properly seated in its groove.
Note:
Check that the nipple fits easily into the coupling,
and check for leaks in the external pressure sup-
ply (see “ Checking non-return valve for leaks
(Oxygen, Combi and Suction module)” on
page 8).
50
O
50
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