Grand S370N, Owner'S Manual

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OPERATING THE CRAFT
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a) The valve is closed b) The valve is open
Fig. 11. Design of the inflation valve.
When the spindle is in the normal (closed) position, the valve operates as a check valve and opens
when air is pumped into the tube.
To release air from the tube, press down and hold the spindle. If you need to fully deflate the tube,
press and turn the spindle counter clockwise to lock it in the "open" position.
Strap
Valve cap
Spindle