Caterpillar Inc.

Christopher Lee Bach

Curtis John Graham

Trent A Simpson

Michael D Bridges

Adam William Ostein

Patrick W Savage

Patrick William Savage, Jr

A method of increasing oil pressure in a heavy duty truck engine lubricating system is provided. The lubricating system comprises an oil pressure regulating assembly mounted in an oil filter base and having a main spring to regulate oil pressure, and a high pressure relief valve assembly mounted in the oil filter base and having a peak clipping spring to relieve oil pressure when the pressure exceeds a specified limit. The method includes the steps of replacing the main spring with a replacement main spring having a higher spring constant and replacing the peak clipping spring with a replacement peak clipping spring having a higher spring constant. A replacement kit for increasing oil pressure is also provided.

Apparatus and method for replacing an oil pressure regulating assembly and a high pressure relief valve assembly

Embodiments of an oil pump for an engine have an increased pump capacity while maintaining or marginally increasing the overall physical size of the pump. In some embodiments, this increased capacity is reflected in a pump length efficiency ratio, which compares an effective gear length (L) of first and second pump gears used in the oil pump, to an effective housing length (L). The effective housing length (L) is a longitudinal distance between surfaces on opposite ends of the oil pump that must be maintained for the oil pump to fit into an available space. Accordingly, the pump length efficiency ratio indicates how much of the effective housing length (L) can be occupied by the gears. Alternatively, the pump capacity is measured using an output flow efficiency ratio, which compares a theoretical pump flow (F) at a given gear speed (S) to the effective housing length (L) of the pump.

Oil pump for an engine

A process for remanufacturing a cylinder head that includes a worn or damaged rocker arm stand adapted to receive a rocker shaft to which at least one rocker arm is mounted, the steps including machining a channel in a surface of the worn or damaged rocker arm stand, securing an insert into the channel, and machining the insert to form a remanufactured inner facing surface. The remanufactured cylinder head includes at least one rocker arm stand that has a machined channel with a remanufactured insert secured therein, the rocker shaft being disposed adjacent the inner facing surface, not the rocker arm stand.

Cylinder head rocker arm stand repair and process

An insert for use in a remanufactured cylinder head rocker arm stand, the insert comprising an inner facing surface having a radius within a range of 35 to 45 mm and a length within a range of 70 to 103 mm, and an outer facing surface adapted for disposal against a channel in the rocker arm stand, the rocker arm shaft being disposed adjacent the inner facing surface in use, but not adjacent the rocker arm stand.

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Chillicothe, IL, United States of America

Christopher Lee Bach