A bearing housing assembly comprising: a bearing housing comprising: a bearing housing wall portion configured to form a bearing assembly chamber for receiving a combination of a bearing assembly and a shaft to be rotated; an oil sump configured or formed within the bearing housing for receiving and containing oil for lubricating the bearing assembly when the shaft is rotated; an oil path channel configured or formed within the bearing housing as an oil path to receive dirty oil from the bearing assembly chamber for traveling down the oil path; and a filter assembly wall portion configured to form a filter assembly cavity that is coupled fluidically between the oil sump and the oil path channel and also configured to receive a filter assembly; and a filter assembly configured to mount in the filter assembly cavity, couple to the filter assembly wall portion, receive the dirty oil traveling down the oil path, filter the dirty oil and provide filtered oil to the oil sump, so the filtered oil can be recirculated to lubricate the bearing assembly when the shaft is rotated, and characterised in that the bearing housing assembly comprises a plurality of filter assemblies, each filter assembly configured to mount in a respective filter assembly cavity configured or formed in the bearing housing, couple to a respective filter assembly wall portion configured or formed in the bearing housing, receive respective dirty oil traveling down respective oil path channels configured or formed in the bearing housing, filter the respective dirty oil and provide respective filtered oil to the oil sump. a bearing housing comprising: a bearing housing wall portion configured to form a bearing assembly chamber for receiving a combination of a bearing assembly and a shaft to be rotated; an oil sump configured or formed within the bearing housing for receiving and containing oil for lubricating the bearing assembly when the shaft is rotated; an oil path channel configured or formed within the bearing housing as an oil path to receive dirty oil from the bearing assembly chamber for traveling down the oil path; and a filter assembly wall portion configured to form a filter assembly cavity that is coupled fluidically between the oil sump and the oil path channel and also configured to receive a filter assembly; and a bearing housing wall portion configured to form a bearing assembly chamber for receiving a combination of a bearing assembly and a shaft to be rotated; an oil sump configured or formed within the bearing housing for receiving and containing oil for lubricating the bearing assembly when the shaft is rotated; an oil path channel configured or formed within the bearing housing as an oil path to receive dirty oil from the bearing assembly chamber for traveling down the oil path; and a filter assembly wall portion configured to form a filter assembly cavity that is coupled fluidically between the oil sump and the oil path channel and also configured to receive a filter assembly; and a filter assembly configured to mount in the filter assembly cavity, couple to the filter assembly wall portion, receive the dirty oil traveling down the oil path, filter the dirty oil and provide filtered oil to the oil sump, so the filtered oil can be recirculated to lubricate the bearing assembly when the shaft is rotated, and characterised in that the bearing housing assembly comprises a plurality of filter assemblies, each filter assembly configured to mount in a respective filter assembly cavity configured or formed in the bearing housing, couple to a respective filter assembly wall portion configured or formed in the bearing housing, receive respective dirty oil traveling down respective oil path channels configured or formed in the bearing housing, filter the respective dirty oil and provide respective filtered oil to the oil sump.