Lubrication system for a vibratory pile driver

A lubrication system for a vibratory pile driver, comprising:

• a gearbox assembly, with a gearbox housing, for a vibratory pile driver which includes a set of axles, a set of counterweights mounted on the axles, a set of gears mounted on the axles with bearings, and a drive motor for the gearbox assembly, wherein in operation, the counterweights produce a vibration action of the gearbox assembly, wherein a layer of lubricating oil is maintained at the bottom of the gearbox assembly during operation of the gearbox assembly;
• a pump assembly, separate from the gearbox assembly, the pump assembly including a moveable member therein having a retracted position and a forward position for moving oil out of the pump assembly, wherein the movable member is in its retracted position when the vibratory pile driver is not in use;
• an oil entry line extending from the gearbox assembly to the pump assembly, permitting movement of oil through a one-way check valve from the gearbox assembly to the pump assembly when the vibratory pile driver is not in use, such that oil is present in the pump assembly prior to operation of the gearbox assembly and the moveable member is in its retracted position;
• an actuating system separate from, and operative prior to operation of, the gearbox assembly for moving oil under pressure to the pump assembly, forcing the moveable member in the pump assembly to its forward position, resulting in movement of oil present in the pump assembly through a one-way check valve to an oil exit line, which extends from the pump assembly to an inlet in the gearbox housing, the oil reaching the inlet prior to operation of the gearbox assembly;
• and
• a spray mechanism in the gearbox housing to which the oil exit line is connected, the spray mechanism operative to produce a spray for lubrication of the bearings in the gearbox assembly prior to operation of the gearbox assembly.