Abstract: An spring apparatus for use with an automatic swinging door closure system wherein the system includes a motor linked to a door via a gear train and a drive arm, the train including a plurality of gears including a first gear adjacent the motor, the motor driving the gears to move the door in either a clockwise or counter-clockwise direction and the apparatus for driving the gears in the direction opposite motor direction when motor power is cut off, the apparatus including a spring mounted within a housing which is linkable to the first gear in a first orientation to cause clockwise door movement and is linkable to the first gear in a second orientation to cause counter-clockwise door movement, the apparatus is easily modifiable so as to be configured in either of the first or second orientations and also includes a tension adjusting mechanism for adjusting spring tension.

Abstract: A downwardly swinging air filter from the roof overhang of a vehicle cab to allow replacement of the air filter. The filter is carried in the tray pivotally supported and latched in an operating position which seals the filter on the inlet and outlet surfaces.

Abstract: A device for replacing resilient isolators on the vehicle. The resilient isolators isolate the platform from the vehicle chassis and the device permits the operator to replace the isolators individually without assistance from another as a maintenance feature of the vehicle.

Abstract: An isolated step on a tractor with means isolating the step from the vehicle chassis and for dampening vibrations of the step which is mounted on an isolated cab of the tractor.

Abstract: An isolated step mounted on an isolated cab of a tractor with stabilizer means isolating the step from the vehicle chassis and dampening vibrations primarily through shear stress of an elastomer.