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TM 10-4210-235-13
NOTE
Procedures are the same for either the dry chemical or AFFF system.
(1)
Close cylinder valve if open
(a)
Turn cylinder valve hand wheel (1) (fig. 4-3) fully counterclockwise (open).
(b)
Close (lower) quick release lever (2) and rotate cross shaft (3) until flat is horizontal
(c)
Turn hand wheel (1) fully clockwise (closed).
Figure 4-3. Cylinder Valves
(2)
Relieve system pressure (a) Remove strip tie (1) (fig. 4-4).
(b)
Pull retaining clip (2).
(c)
Open ball valve (3).
(d)
Squeeze fire hose nozzle valve lever (1) (fig 4-5) to relieve system pressure.
(e)
Close ball valve (3) (fig 4-4)
(f)
Install retaining clip (2) over ball valve (3) handle.
(g)
Install new strip tie (1).
4-15
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