Fuel Pump

technical data -

A.C. type T. 1524274 (replaced by type U. with series II engine).
Working pressure from 1.1/2 to 2.1/2 lbs/sq inch.


maintenance -

To be written...


problems -

The priming lever should move freely until almost horizontal. Approximately 3/4 way thru travel some resistance may be encountered - too much resistance may be a result of an overly stiff diaphragm (sometimes accompanied by a 'wheezing' sound).

If the diaphragm has perished, petrol may have found its way into the engine and the oil must be changed.

The filter is sometimes replaced upside-down - the metal 'bands' should be on the underside of the filter.

The spring for the priming lever has been known to snap.

The small brass or plastic 'triangle' which holds the valve spring in place can apparently be easily broken (or lost). This part is not included in pump overhaul kits.

The inlet (and outlet) may have been abused, resulting in leakage due to thread damage.

The screws holding the upper and lower body together can be overtightened, resulting in thread damage and leakage.


removal -

To be written...


other notes -

Although the parts catalog claims this pump was replaced by the type U, the intention may never have been carried out, since the Barker-bodied LD10 appears to have been fitted with the type T still.

The T and U type pumps were fitted to a variety of cars, making spare parts relatively easy to source.

The type T was in general use from 1934 onwards and consists of a single-piece body with domed metal cover, the type U was in general use from 1948 onwards and consists of a single-piece body with detachable valve assemblies and metal cover.


diagrams -

All images are scanned from originals, wherever possible, at 100dpi (unless otherwise noted) and must be scaled when printed to preserve the original size (eg. scale up by 3 times for a 300dpi printer).

Note, however, that due to slight scaling inaccuracies during both the scanning and inevitably the printing, these images should be taken as an approximation for reference only.
In addition, drawings, measurements and notes of materials used are intended as a guide and aid to the restorer, and not necessarily a definitive, or even guaranteed correct, reference.

 

The AC Delco fuel pump overhaul kit consists of the following parts:


AC Fuel Pump (Judge, extract)