17
PUMPING TYRE
(It applies to stroller fitted with wheels pumped)
Illustration 39. Illustration 40.
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Before pumping the tires, identify the type of valve which is located on the tire. This
may be one of the two valves shown in Illustration 26 and 27.
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Prest valve also has an additional small top, which must be loosened before pumping.
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After identifying the valve, prepare the pump designed to valve type.
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Most of the new pumps are equipped to service both Prest valve and Schrader. Many
of them let to reverse the tip. Smaller hole is Prest valve, Schrader valve greater. If the
pump does not support Prest, you will need to buy yourself the "adapter Prest", which
is available at any bike store.
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At this point, if the wheel is provided with a valve Prest, it will be necessary to
unscrew the top located on the vent. It is a small top, which can be unscrewed with
fingers. When doing this, the top should move upwards. Then valve is considered
open.
•
Then remove the plastic top from the valve and set it aside in a safe place. It is
important to not lose it, because the valves will get dirt, leading to difficulties in
pumping and rapid air loss.
•
Place the nozzle of the pump to the valve and check if it stick properly. If it is needed,
push the pump to the valve to make sure that the air does not escape to the sides.
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If the pump has a lever with clamp at the nozzle, tighten it. If the nozzle of the pump
and valve have a threaded tip, screw them together. As a result, air will be streamed
directly to the inner tube and the nozzle can not be detached from the valve.
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At the beggining of pumping the pressure in tyres should be checked at some points.
Check tire pressure with your fingers at the end of the tread. If it is possible, make
only a millimeter indentation. It means that the tire has enough air. If necessary
continue pumping.
•
After pumping, remove or unscrew the nozzle from the valve outlet while compressing it's
ends by thumb. It is recomended to do this quick enough in order to not loose too much air.
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For Prest valve, tighten previously loosened additional small top.
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Screw the plastic top on the valve.
Schrader valve
Prest valve
