Air Filters
The Air filter is used to restrict any particulate matter and water from entering the air valve on the pump. The particulate can jam the shuttle or act abrasively widening the tolerances which reduce efficiency and eventually cause air slippage around the shuttle. The presence of water in the air valve mixing with the required lubricant can create an emulsion causing resistance and stalling in the shuttle, also excessive water entering into the pump air chamber can cause off centre loading on the shaft which causes early failure of the shaft and 'O' rings.
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