Dräger PSS BG 4 RP, Instructions For Use Manual

Page: 59 / 78

Maintenance
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4.2.8 Removing the breathing bag, drain valve,
minimum valve and where applicable the water
absorber
1. Press together the springs underneath the spring holder
and remove.
2. Unfasten the medium-pressure hose of the minimum valve
from the pressure reducer (see chapter 4.2.11 on page 60).
3. Remove the drain valve (A-4) from the retaining clips (A-5).
4. Release the safety catch (2) from the stop tab (1) on the
spring carrier.
5. Remove the breathing bag with minimum valve (3) and drain
valve from the spring holder.
6. Detach the minimum valve from the breathing bag:
To do this, stretch the tab on the sleeve and remove from the
minimum valve.
7. If a water absorber is fitted:
Remove the water absorber from the drain valve and dispose
of it.
8. Detach the drain valve from the breathing bag:
To do this, stretch the tab on the sleeve and remove.
9. If the breathing bag needs to be removed, unhook the
pressure plate (B-6) from the breathing bag.
10. Check the drain valve:
a. Unscrew the cover (9).
b. Remove the valve disc (8), check and replace with
a new valve disc if necessary.
c. Ensure that the sinter filter (7) is fitted.
d. Insert the shaft of the valve disc into the hole.
e. Position the springs (10) centrally onto the valve disc.
f. Screw the cover on securely.
4.2.9 Removing the switch box
1. Use a slotted screwdriver to release the switch box from
the holder.
2. Pull the switch box out of the holder and put it aside. Do not
detach the electrical lines.
4.2.10 Disassembling waist belt and shoulder straps
1. Lift the locking clips on the waist belt (1) in the carrying
frame and push outwards through the slots.
2. Remove the shoulder straps from the waist belt if necessary.
3. Press the waist belt inwards at the fixing point (2), rotating by
90° and move outwards.
4. Open the press studs on the hoses and remove the
Bodyguard from the shoulder strap.
5. Tilt the locking clips on the shoulder straps upwards into the
carrying frame and press outwards through the slits.
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10
NOTICE
Only remove waist belt and shoulder straps if very dirty
or if they need to be replaced.
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