Torque Path in High---Range, Lockup Drive, Left Steer---Schematic

TM 9--2520--215--34 0005 00--27 THEORY OF OPERATION -- CONTINUED 0005 00 TORQUE PATHS THROUGH TRANSMISSION – Continued Torque Path In High Range, Lockup Drive Left Steer NOTE Refer to Torque path in High--Range, Lockup Drive, Left Steer and Hydraulic system, High--Range Lockup Drive Left Steer. Refer to Torque Path in High Range, Lockup Drive, No Steer for the action of the high--range gearing. Steer action in high range is described in the following paragraphs. In every steer condition, counterclockwise rotation is delivered to both right and left steer clutch drive gears. These gears are driven by the train of gears including the steer bevel gear splined to the turbine shaft. During left steer in high range, the left steer clutch is engaged. This causes the left steer--planetary sun gear and left tie--steer--clutch drive gear to rotate counterclockwise as does the left steer--clutch drive gear. The right tie-- shaft drive gear and right steer--planetary sun gear are driven clockwise by the tie shaft and the tie shaft idler. The counterclockwise rotation of the left steer--planetary sun gear causes a reduction in the speed of the left transmission output. The clockwise rotation of the right sun gear causes an increase in the speed of the right trans- mission output. Thus, the vehicle steers towards the side on which track is moving slower. In left steer, the right steer clutch is released. The steer flywheel is simply a stabilizer for the steering system. In straight travel, it is stationary. tending to remain stationary due to inertia. This damps out any tendency of the output sun gears to oscillate during straight travel. During steer, the flywheel rotates and its inertia smoothes out the application or release of steer. Jerking and violent transition to or from the steer condition is prevented Refer to this work package for the gear ratios involved in high--range steer. LOCKUP CLUTCH APPLIED LEFT---STEER CLUTCH APPLIED SLOWER ROTATION FASTER ROTATION HIGH---RANGE CLUTCH APPLIED Torque Path in High---Range, Lockup Drive, Left Steer---Schematic DIRECTION OF TRAVEL