Might as well say this all now to save any possible problems for folks later on.
MOST injection pumps and injectors are tailored to suit a particular engine, given that the engine may be a single-speed or variable speed etc etc.
The lists of injection pumps, elements (the pumping part inside the pump body) delivery valves, injector nozzles and delivery valves runs to some number of volumes of finely printed data, and it is nearly always possible to ID a pump or element and match it to an engine.
When it comes to swapping around, then it starts to get complicated.
Elements are indentified by a number stamped on the 'ear' of the plunger part, usually taking the form of a number, then a backslash then a letter.
For the BPF1B size pump used on Lister 5/1 engines, there are 39 elements listed from 6mm diameter to 10mm diameter. In the 7mm required for a Lister 5/1 there are 7 listed.
The pump is BPF1B70CS6253 and was used for nearly all the 5/1 and 6/1 8/1 10/2 12/2 and 16/2 engines.
The CAV element part number is 7009-43.
The marking on the element should be B1/1
The delivery valve for this pump is CAV part no 7010-188
If you go through the CAV and Bryce parts lists, you will come across common parts, parts that fit more than one engine/pump. The delivery valve 7010-188 for example is very popular with more than 10 applications, so the chances of spares remaining available is good.
The 7009-43 element however is not used on as many pumps, and therefore may be a problem to source.
In practice there is a big pattern parts business for injection parts in Italy, and a lot of these parts can still be obtained, but changing an element from the correct one to another 'unknown' one can be dangerous.
7009-43 has an equivalent grooved part no 7010-562P with the same B1/1 ID, so it should be equivalent.
7009-44 however is a different beastie. It is 7.5mm diameter, marked B1/7
7010-360 is a 7mm element with an inverted helix, which will NOT respond in the same way on your engine as the original! marked B18/5.
And so on.
We have four LARGE folders with a couple of thousand pages of photocopied factory data on injection equipment which we use to help ID parts and fittings for old engines. There is too much to copy to the website, but we are always happy to assist where possible in identifying any parts.
Peter
