Plus and PSS Series - Lung Demand Valve
tm 1285.001 - August 2001
5:9
5.6 Replacing Medium Pressure Hose
5.6.1 Removing Medium Pressure Hose
Tools required
Screwdriver 3336222
Plate Spanner R26817
Retractor Tool 3310663
1 Disconnect demand valve from female quick release coupling of
equipment.
Note:
Fixed variants of the lung demand valves incorporate a medium pressure
hose fitted directly to the medium pressure outlet port of the pressure
reducer. These demand valves should be removed from the reducer.
For details of removal of hose from the reducer refer to the appropriate
section of the relevant C.A.B.E. Training Manual.
2
3
4
Fig. 5
0584
1
Refer to Figure 5.
(Type A illustrated)
2 Fold the rubber cover (1) from
front of lung demand valve.
Using plate spanner inserted into
radial slots of bayonet cap, turn
bayonet cap (2) counter-
clockwise and remove from
body of demand valve.
Note:
The positive pressure spring
remains attached to the
bayonet cap.
Do Not
remove
spring. Take care not to stretch
or distort the spring.
3 Using the thumb and forefinger
carefully grip the centre plate of
the diaphragm (3), tilt centre
plate and lift the diaphragm from
the body of the lung demand
valve. Remove slip ring (4).
Refer to Figure 6.
Important Note: Spacer (1) must be
removed before attempting to
remove Clip (2).
Fig. 6
1134
1
2
3
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