| 摘要 |
PURPOSE:To form easily a drain passage of an auxiliary transmission side by forming a drain passage for communicating a lube oil reservoir with the opposite side of a lube oil reservoir of the friction element, between the outer surface lower part of a piston drum and an auxiliary transmission case. CONSTITUTION:The second piston drum 152 of a reduction brake composing an auxiliary epicycle transmission gear 114 is formed separately from an auxiliary transmission case 134. Owing to this reason, a drain passage 170 for communicating the chamber 162 side of a reduction brake with the oil pan 133 side of the reduction brake can be formed by the forming of a channel part 168 simultaneously with the molding of the auxiliary transmission case 134, without any machine work when the second piston drum 152 is attached. Consequently, the processing of the drain 170 is remarkably simplified in cooperation with the integral forming of the auxiliary transmission case 134 so that the productivity of the auxiliary transmission is improved and a large cost down can be aimed. |
