Scheduled Maintenance Table - Spasciani TR 2002 Manual Del Usuario

• Remove the cover that blocks the connector. Take off the valve holder by operating on the clamping
lever. Then take off the pin and the spring which act as automatic device for the pressure regulation.
• Remove the positive pressure assembly.
• Remove the exhale membrane from the stem and, if necessary, remove the stem as well by pushing it
outwards from the inside of facepiece.
To reassemble proceed backwards. Take special care in re-positioning the little pin and the spring: insert
the spring first around the little pin, then insert pin in the cover. While keeping the pin lifted slide covers in
position. Do always verify that pin be free to move.
5.3.3 Exhalation valve holder
The Exhalation valve holder can also be dismantled and replaced. To do that press the spring (4) that holds
the valve holder in place and take it out. Extract then the valve holder (6) and the OR (5). To mount it again
follow the same steps backwords.
5.3.4 Speech device
The speech diaphragm is replaced by unscrewing the locking ring inside the mask, using round nose
pliers or the appropriate spanner. Take care, when reassembling, that the O Ring (placed beneath the
membrane) be present and in good condition and that the speech diaphragm be placed with the circular
ribbing facing the O-Ring. Should the membrane be mounted up side down, it is impossible to tighten the
locking ring.
5.4 Inner half mask
Tear the mask by pulling it towards the outside. To replace it, reinsert it by fitting it onto the proper seat
machined into the body of the Connector Valves Speech device assembly.
To replace valves remove them complete with seating and insert new valve assemblies.
5.5 Headharness
The head harness can be easily removed by stripping it off from the buckles.
The frontal buckle can be removed by sliding the retaining pin from its location the other four can be
removed by pushing out with the help of a punch the retaining metallic pins.
To reassemble the head harness let the strap tips slide into the buckle, tak¬ing care to keep the knurled
side inwards.
6.

SCHEDULED MAINTENANCE TABLE

Part Activity
Complete Mask General Visual inspection (Connector, visor, inhalation
valve, headharness, speech device and inner half mask)
Cleaning (as explained in par. 8)
Check of Pneumatic Tightness (as explained in par. 4.3.)
Efficiency (as explained in par. 7)
Connector OR replacement
Inhalation valve Replacement
Exhalation valve Visual inspection (as explained in 7.1)
Replacement
1: Before use - 2: After use - 3: Every six months - 4: Annually - 5: Every two years
) For masks being used
a
7. MASK EFFICIENCY CHECKS
Every time the mask is reassembled, before using it after a long period of inactivity and every time the
mask fails the pneumatic tightness test in par. 4.3, the perfect efficiency of the mask should be checked.
The checks performed as indicated below, allow you to control if the mask reassembling operation has
been carried out correctly and also spot any worn parts which should be replaced.
7.1 Visual check of the exhalation valve condition
To do this, remove the valve protection cover. If the membrane is deteriorated (sticky, hardened,
) For stocked masks
b
10
1 2 3 4
X
X
X
X
X
a
5
X
X
X
X
X
b