Find the Schrader valve and remove any dust-cap. If the valve hasn’t been opened for a while
release a short hiss of air to check it’s not stuck. The same process, holding the valve
open longer, deflates the tyre. Release air by pressing down on the valve
stem. A match stick or some other small blunt tool may be helpful. The hose or pump connection may screw on or
press on. Some push fit connections lock with a cam lever. A push fit connection to a Schrader valve
usually needs a locking lever. A small amount of air is released when the connector goes
on or off. Pull the connector off briskly, parallel to the valve, to minimise the air
loss after pumping. Fully open and fully close the pump with each
stroke. Place both feet on the rests to stabilise
the pump. Open the pump fully at the start of each stroke. It helps if you can brace the connection between
the Schrader valve and the pump by hooking a finger or two around the tyre or spokes.
Plant your feet and try to position yourself so you can get your shoulder behind the piston
of the pump.