Filters fitted to most mechanical pumps Most mechanical
pumps have a removable top covering the filter. On earlier units the top may be
a glass dome.A central screw or nut holds the top on. Unscrew this, lift off
the top and take out the filter. If a flexible fuel pipe is connected to the
top, leave it there. This will ensure that you refit the top to the pump the
right way round.tto auto oil seals
superior quality.
Some pumps have a cylindrical filter attached to the cover, which screws by hand into the pump.Some may also use crimped-on pipe clips; snip off with side cutters and replace with a screw clip if the pump is removed.shaft oil seals.
SU electric pumps
The most common SU electric pump has two dome-headed right-angled ‘elbow’ inlet and outlet nozzles. They are made of black plastic and mounted side by side, but leading in opposite directions.Which one does which job is marked on the casing. Remove only the inlet nozzle and work quickly, because the rubber sealing ring ? under it swells up when exposed to the air for a time.Do not remove the filter – clean it by brushing dirt away with a clean, small paintbrush and fresh petrol.Check that there are no loose bristles in the brush. Take care to refit the nozzle the right way round.tto auto oil seals superior quality.
Earlier SU pumps have screw-in connections mounted almost at right-angles to each other. The filter is under a large brass-headed cap opposite the outlet to the carburettor.Two other SU electric pumps are found on larger cars. Both have inlet and outlet pipes side by side.One has a double electromagnet – the large black cylindrical part.
Remove the ring and take off the inlet elbow only.dust oil seals.
Do not remove the gauze filter – clean it in position.Unscrew this plate to release the valves – remove the inlet valve only.auto oil seals.The valve must be refitted the right way round, or the pump will not work.To reach the filter on either type, you have to remove the magnet cylinder from the base.On the double type, remove only the cylinder that is positioned on the right as you view the pump, with the word ‘top’ moulded into the base facing you and the right way up.Take out the six screws holding the pump together, and separate the cylinder and base.
On the base, two more screws hold a metal plate over the two valves. auto oil seals.Unscrew them and take out the inlet-valve cover and valve – the outlet valve is marked ‘out’ on the outside of the base.
The filter, a small gauze disc between two rubber seals, is underneath. Prise it out gently with a pin.Be sure to reassemble the pump correctly – the valve goes back with the straight strip on top. Check that the gasket between the main parts of the pump is sound, but do not turn it. It must remain in the same position for the pump to work.Refit the pump, and the two electrical connections and reconnect the fuel pipes.tto auto oil seals superior quality.viton oil seals.
Some pumps have a cylindrical filter attached to the cover, which screws by hand into the pump.Some may also use crimped-on pipe clips; snip off with side cutters and replace with a screw clip if the pump is removed.shaft oil seals.
SU electric pumps
The most common SU electric pump has two dome-headed right-angled ‘elbow’ inlet and outlet nozzles. They are made of black plastic and mounted side by side, but leading in opposite directions.Which one does which job is marked on the casing. Remove only the inlet nozzle and work quickly, because the rubber sealing ring ? under it swells up when exposed to the air for a time.Do not remove the filter – clean it by brushing dirt away with a clean, small paintbrush and fresh petrol.Check that there are no loose bristles in the brush. Take care to refit the nozzle the right way round.tto auto oil seals superior quality.
Earlier SU pumps have screw-in connections mounted almost at right-angles to each other. The filter is under a large brass-headed cap opposite the outlet to the carburettor.Two other SU electric pumps are found on larger cars. Both have inlet and outlet pipes side by side.One has a double electromagnet – the large black cylindrical part.
Remove the ring and take off the inlet elbow only.dust oil seals.
Do not remove the gauze filter – clean it in position.Unscrew this plate to release the valves – remove the inlet valve only.auto oil seals.The valve must be refitted the right way round, or the pump will not work.To reach the filter on either type, you have to remove the magnet cylinder from the base.On the double type, remove only the cylinder that is positioned on the right as you view the pump, with the word ‘top’ moulded into the base facing you and the right way up.Take out the six screws holding the pump together, and separate the cylinder and base.
On the base, two more screws hold a metal plate over the two valves. auto oil seals.Unscrew them and take out the inlet-valve cover and valve – the outlet valve is marked ‘out’ on the outside of the base.
The filter, a small gauze disc between two rubber seals, is underneath. Prise it out gently with a pin.Be sure to reassemble the pump correctly – the valve goes back with the straight strip on top. Check that the gasket between the main parts of the pump is sound, but do not turn it. It must remain in the same position for the pump to work.Refit the pump, and the two electrical connections and reconnect the fuel pipes.tto auto oil seals superior quality.viton oil seals.
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