Abstract: A lube oil filter housing including a tubular outer shell, a pair of covers, an inlet, an outlet, a clean fluid chamber and a filter element support is provided. The tubular outer shell and pair of covers define an internal cavity. A clean fluid chamber is interposed fluidly between an inlet and an outlet within the internal cavity. The clean fluid chamber includes at least one connection site for sealingly connecting with a filter element. The clean fluid chamber has at least one removable cover to provide access to a clean fluid portion defined by the clean fluid chamber. A removable filter element support is configured to support an end of the filter element opposite the end of the filter element that cooperates with the connection site. The outlet may include a removable connection tube removable from the tubular outer shell to provide access to the clean fluid portion.

Abstract: A bypass filter cartridge is provided having a low efficiency filter element and a high efficiency filter element oriented in either parallel or series. The low efficiency filter element may comprise pleated filter sheet while the high efficiency filter element may include a tubular ring of depth media with considerable thickness or pleated media of varying types. The filter cartridge may be adapted and configured for use in specialized locomotive oil lubrication circuits with substantial benefit therein.