seals 86 providing a resilient bias and seal for the fittings 42 44 against the metering plate disk 36 other biasing means may also be used to seal the fittings against the disk such as a spring assembly between the manifolds and a retention plate or individual springs for the fittings a further series of bores 112 may be provided in the upper manifolds to allow air bubbles to vent up through the lubricant from between the manifolds as shown in fig3 the metering plate disk 36 may contain receptacles for the lubricant in the form of a series of apertures or throughbores 46 extending between the top and bottom surfaces of the plate and located in a circular array capable of being aligned with one or more sets of fittings in the manifolds 32 34 as depicted the apertures may be arrayed in staggered order along an arc each of the apertures 46 is dimensioned to correspond to a discrete volume of lubricant which is intended to be transmitted through the distribution system coupled to the invention the throughbores may be for example 30 in number and 0 046 inches in diameter in a disc of 0 03 inch thickness the disk may rotate for example at a speed of between 1 and 3 rpm the metering disk rotates about its center a central aperture assembly 48 being provided to allow the disk to be connected to the transmission 20.