Abstract: An oil seal arrangement includes a non-rotating oil ring and a rotating guide ring. A flexible oil seal is bonded to the oil ring and sealingly engages the guide ring to retain lube oil in a bearing chamber. A flexible lip seal and a spacer member rotate with the guide ring and slidably engage portions of the oil ring which are exposed to lube oil and spaced apart from the oil seal.

Abstract: A warning circuit generates warning signals in response to conditions of a vehicle brake system which includes main and back-up brake fluid pumps. The main pump is engine-driven and ignition-switch controlled. The back-up pump is relay actuated and battery powered. A sensor switch opens upon operation of the main pump and a brake switch closes during an operator brake application. The warning circuit includes a first OR gate with inputs coupled to the ignition and brake switches. The output of the first OR gate is coupled to the relay and to a first warning lamp. The output of the first OR gate is capacitively coupled to the set input of a set-reset flip-flop and is coupled to the reset input of the flip-flop. The reset input is also coupled to a terminal of the back-up source. The Q output of the flip-flop is coupled to an input of a second OR gate through an inverter.