TM-9-2520-234-35 Technical Manual for M109 Transmission XTG-411-2A Download
Page 87 of 323
PAR 54 TORQUE PATHS CHAP 2, SEC V Figure 30. Second-gear, full-left-steer torque path, lockup operation 54. TORQUE PATH - - SECOND GEAR, FULL-LEFT STEER, LOCKUP OPERATION (fig. 30) a. Torque is transmitted to the steer planetary ring gears in the same manner as that for first gear, as described in par. 47a and b, above. From this point, to the power train outputs, the torque paths for the right and left sides are different. b. The clutch-brake method is used for second-gear steer. In this method, steering results when the brake is applied at one side while the drive clutch is engaged at the opposite side. In second gear, the drive clutch is the output clutch. The vehicle steers toward the side on which the brake is applied. c. In left steer, in second gear, the left brake is applied while the left-output clutch is released. The drive clutch (output clutch) on the right side is still engaged and continues to drive. Hydraulic action, controlled by the steer control valve, releases the drive clutch and applies the brake. An opposite movement of the steer control valve will release the right-output clutch, apply the right brake, and result in right steer. d. Full and partial steer in second gear is controlled as explained in par. 53d, above. Refer to TABULATED DATA, par. 7, for gear ratios applicable to second gear, left steer. 57