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INTRODUCTION
To aid component identification in the following procedures, bracketed numbers after a
component show component's location in the T8 diagram inside the front cover.
DONNING
Note: Initial donning procedures should be supervised by a competent person. Select the
appropriate size of mask: S/M or M/L.
1. Check that all parts of T8 are clean and in good condition.
2. Check that the breathing hose seal (8b) is in place and in good condition and screw the
breathing hose (8a) firmly, hand-tight, onto the halfmask (Fig 1). Do not over-tighten.
3. Adjust the harness (1) so that the buckle is away from the mask and the head pad rests on
top of the mask. Place the strap around the neck (Fig 2).
Note: Once a comfortable fit has been achieved for a given wearer, there should be no need to
alter the head-strap length when donning in the future.
4. Place the halfmask on the face and adjust until the faceseal (2) fits smoothly against the
face.
5. Pull the head pad onto the crown of the head (Fig 3) and adjust the harness, feeding the
harness through the anchors to equalise the pull on the anchors.
6. The mask should feel firm against the face with no undue movement. If it does not fit, or is
uncomfortable, adjust the harness (1) length using the nape buckle (It may be easier to do this
prior to donning the mask). Excessive tightening causes discomfort and may distort the face
seal.
7. Test the faceseal by blocking the breathing hose inlet with the palm of the hand and
inhaling. Check that the mask pulls onto the face until the wearer exhales. If there is a leak,
check the faceseal, breathing hose seal (8b) and the exhalation valves (4a). It may be
necessary to try the alternative size of mask. Do not use the mask if a good fit cannot be
achieved.
8. Arrange the breathing hose so that it trails freely down the back and is not kinked, likely to
snag, or be crushed.
9. Follow the instructions in the T/POWER leaflet to: Attach the breathing hose to
T/POWER, Perform the airflow test, and Check the filters.
AFTER USE
WARNING: DO NOT remove the halfmask until well clear of the hazard area.
1. Take off the halfmask and undo the breathing hose.
2. Clean the mask and the outside of the breathing hose with a synthetic sponge moistened
in a mild solution of soap and warm water, or TriGene solution.
Note: Water MUST NOT enter the breathing hose.
3. Rinse the mask thoroughly under clean running water and hang it by the harness until
thoroughly dry. DO NOT use radiant heat or sunlight to speed drying.
4. Use TriGene wipes to sanitise the faceseal.
5. After cleaning, check that all components are in good condition. Worn or damaged items
must renewed prior to further use.
MAINTENANCE
Important: Check the valve flaps (4a) and (4b) visually every 3 months to ensure that they are
clean and undamaged. Check that the faceseal (2) and valve flaps are flexible. Valve flaps
must be replaced annually.
Important: The breathing hose elbow is glued to the halfmask shell (3) and must not be
removed. If an elbow is removed or damaged, the shell assembly must be renewed.
