Fuel injection pump

A fuel injection pump comprising:

• a pump housing;
• a pumping arrangement associated with the pump housing;
• wherein the pumping arrangement includes a pumping plunger and a plunger drive arrangement, the pumping plunger having a first end reciprocably received within a plunger bore provided in the pump housing and a second end coupled to the plunger drive arrangement;
• and
• a biasing spring having first and second spring ends, the first spring end coupled to a spring plate member associated with the pump housing and the second spring end coupled to the plunger drive arrangement;
• wherein the pump housing includes first and second portions aligned on a common axis (A), the first portion including a further bore in which at least an upper portion of a locking pin is receivable and wherein the spring plate member comprises first and second axially spaced annular members, each of the first and second axially spaced annular members being provided with a respective aperture, one of said apertures receiving an end of the pump housing and the other of said apertures receiving the pumping plunger, and a support arrangement for supporting a lower end portion of the locking pin.