Pump assembly

A pump assembly for use in an internal combustion engine, the pump assembly comprising:

• a pump housing provided with a bore within which a pumping plunger is reciprocal along a plunger axis which is axially centered about the pumping plunger, a pump chamber defined at one end of the bore within which fuel is pressurised to a relatively high level as the pumping plunger reciprocates within the bore, in use, and an inlet valve housed within the pump housing and in communication with the pump chamber to control the flow of fuel into the pump chamber;
• a clamp member for applying a clamping load to the pump housing, the clamping load having at least a component aligned with the plunger axis, directly from the clamp member on a surface of the pump housing located directly above the bore;
• and
• at least one securing member for securing the clamp member to the pump housing, wherein the at least one securing member is positioned radially outward from the bore and extends through or below a plane such that the plane is through the pump chamber and perpendicular to the plunger axis.