Caterpillar Inc.

Susan J Gaugush

Thomas G Skinner

Marvin K Palmer

Milton Carter Hubbard

Wayne J Wulfert

James Frances Blubaugh

Jeffrey L Degroot

H Paul Dietz

Ted J Loeffelholz

Douglas D Long

Matthew F Schoenberg

A machine lubrication system that includes an assembly for sensing the level of lubricant in the reservoir, the reservoir including a follower that travels axially within the reservoir and substantially conforms to an inner cross-sectional dimension thereof, a magnet being attached to the follower for actuation of a plurality of magnetically actuated switches. The system may include a first and second level sensor, which may be independently connected to one or more power sources, where the first level sensor may be associated with an operator station, and the second level sensor may be associated with a remote indicator.

Lubrication system level control

Overspeed prevention

A method for operating machine transmission during braking, includes obtaining data relating to brake pedal position, machine velocity, machine engine speed, current transmission operating gear, and lowest operating gear. Next, downshifting thresh holds are set based on whether pedal position is in a downshift mode or a braking mode. Next, the transmission is downshifted if the machine velocity and machine engine speed are less than the downshifting thresh holds, and if the transmission operating gear is not the lowest operating gear. Next, the transmission is neutralized if the pedal position is in a neutralizing mode, if the velocity is less than a neutralizing thresh hold velocity, and if the transmission is in the lowest operating gear. Finally, the above steps are repeated until the transmission is neutralized.

Method and apparatus for transmission control during braking

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Romeoville, IL, United States of America

Susan J Gaugush