Lister 5/1 Diesel

Injection Equipment

CAV Injection Pumps - Identification

CAV Logo ©®

A bit of help for those who have a pump and cannot identify what it is or where it came from. The BPF1X series of unit injection pumps is probably the most widely used and copied of its type in the world. Originally designed by Robert Bosch GMBH in Germany, it was made in the UK by a company made up of CAV (C. A. Vandevell - later to be involved in motor car racing) and Bosch. The company was called CAV-Bosch and had the following logo on the workshop manuals:

CAV Bosch Logo

The pumps are identified by their number, followed by a suffix that gives the orientation of the body and other information. The picture below shows the main variants of the BPFX-XX series. The BPF1A and BPF1B pumps are the ones most likely to be encountered on the smaller engines. The BPF1C pumps and upwards are used on much larger engines such as the English Electric and Ruston-Hornsby vertical in-line series.

CAV DPF Pump ID

Pump output varies between models and the size of the pumping element. The following table shows the relationship between the pump element sizes and the voulme of fuel pumped on each stroke. The maximum stroke for each pump varies with the type, and this is shown in the table.

Pump Output Table
Pump Type Element Size Pump Stroke Volume Per Stroke in cu mm's Volume Per Stroke in cu in's Weight Per Pump
BPF1A 4.0mm 7mm 25 cu mm's 0.0015 cu in's 1.5lbs 0.67kg
BPF1A 5.0mm 7mm 40 cu mm's 0.0024 cu in's 1.5lbs 0.67kg
BPF1A 6.0mm 7mm 60 cu mm's 0.0038 cu in's 1.5lbs 0.67kg
BPF1B 5.0mm 10mm 65 cu mm's 0.0041 cu in's 4lbs 1.8kg
BPF1B 6.0mm 10mm 100 cu mm's 0.0061 cu in's 4lbs 1.8.kg
BPF1B 6.5mm 10mm 125 cu mm's 0.0076 cu in's 4lbs 1.8kg
BPF1B 7.0mm 10mm 135 cu mm's 0.0082 cu in's 4lbs 1.8kg
BPF1B 7.5mm 10mm 160 cu mm's 0.0098 cu in's 4lbs 1.8kg
BPF1B 8.0mm 10mm 180 cu mm's 0.0109 cu in's 4lbs 1.8kg
BPF1B 9.0mm 10mm 230 cu mm's 0.0143 cu in's 4lbs 1.8kg
BPF1B 10.0mm 10mm 280 cu mm's 0.0171 cu in's 4lbs 1.8kg
BPF1C 10.0mm 15mm 550 cu mm's 0.0336 cu in's 10lbs 4.5kg
BPF1C 11.0mm 15mm 650 cu mm's 0.0396 cu in's 10lbs 4.5kg
BPF1C 12.0mm 15mm 800 cu mm's 0.0488 cu in's 10lbs 4.5kg
BPF1C 13.0mm 15mm 950 cu mm's 0.0518 cu in's 10lbs 4.5kg
BPF1C 14.0mm 15mm 1100 cu mm's 0.0670 cu in's 10lbs 4.5kg
BPF1C 15.0mm 15mm 1250 cu mm's 0.0762 cu in's 10lbs 4.5kg
BPF1C 16.0mm 15mm 1400 cu mm's 0.0854 cu in's 10lbs 4.5kg
BPF1D 14.0mm 30mm 2300 cu mm's 0.1400 cu in's 28lbs 12.6kg
BPF1D 16.0mm 30mm 3000 cu mm's 0.1830 cu in's 28lbs 12.6kg
BPF1D 18.0mm 30mm 4000 cu mm's 0.2440 cu in's 28lbs 12.6kg
BPF1D 20.0mm 30mm 5000 cu mm's 0.3050 cu in's 28lbs 12.6kg


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