LUBRICANT RETAINER FOR USE IN A PUMP BEARING ASSEMBLY AND, PUMP BEARING ASSEMBLY

摘要

lubricant retainer for use in a pump bearing assembly, and, pump bearing assembly a lubricant retainer for use in a pump bearing assembly, the bearing assembly which in a first operating configuration is lubricated by a lubricant relatively high viscosity and in a second operating configuration is lubricated by a less viscous lubricant, the bearing assembly comprising a bearing housing containing a bore extending therethrough to receive a pump drive shaft, bearings spaced within said bore with a chamber therebetween, each bearing mounting zone arranged for receiving in use a bearing therein; each zone is associated with a lubricant retainer, the lubricant retainer being adapted to be mounted into the hole adjacent to the bearing mounting zone with which it is associated to form a barrier between the bearing mounting zone and the bearing. chamber when the pump bearing assembly is in the first operating configuration, the retainer being removed when the pump bearing assembly is in the second operating configuration.