TM-9-2520-254-34 Direct Support for M113 TX100-1 Transmission 2520-00-066-4240 Download
Page 40 of 126
b. In reverse range, the reverse-range clutch is engaged. This holds the reverse-range planetary ring gear stationary. The reverse-range planetary sun gear is driven (in reverse rotation) by the low- range planetary ring gear. The low-range ring gear is rotated by the low-range pinions. The low-range pinions are rotated by the low-range sun gear which is splined to the turbine shaft. c. This combination of two planetary gear sets to produce the desired ratio and direction of rotation is called compounding (para 2-5c). Reversing actually takes place in the low-range planetary gear set and final speed reduction takes place in the reverse-range planetary gear set. d. The primary input of the compound system is the low-range sun gear. The reaction member in the low-range gear set is the low-range planetary Figure 2-14. High-range torque path. lockup operation. carrier, even though it rotates. The output member of the low-range gear set, connected to the input member of the reverse-gear set, is the low-range ring gear. The input member of the reverse-range gear set is the reverse-range sun gear. The primary output is the reverse-range planetary carrier. The prim ary reaction member of the compound system is the reverse-range ring gear. The reverse-range plan etary carrier transmits torque to the trans- mission output shaft to which it is splined. e. In reverse range, the rear governor. rear oil pump, and speedometer drive gear are driven in reverse direction. Thus they are ineffective; no rear-governor pressure is produced and no oil is pumped by the rear oil pump. The reverse-direction speed reduction ratio between con verter shaft and transmission output is 4.35 to 1. 2-31