TM-9-2520-254-34 Direct Support for M113 TX100-1 Transmission 2520-00-066-4240 Download
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manual selector is at the 2-3 position, the trans- mission cannot downshift to low range. This is prevented by a main pressure branch, at the top, left side of the manual selector valve bore, which directs main pressure to the upper area surface of the low-intermediate shift plug, and to the lower end of the shift valve. This pressure holds the low- intermediate shift valve upward as long as the manual selector is at 2-3 position. b. Other Functions Same as 1-2-3 Operation (fig. 2-7). In high-range (2-3) operation, the other circuits operate as described in paragraph 2-17 for high-range (1-2-3) operation. 2-19. Hydraulic System—Reverse-Range Operation a. Main-Pressure Circuit (red—fig. 2-8). (1) In reverse-range operation, the main pressure circuit functions as described in paragraph 2-15a, except for the distribution of oil at the manual selector valve. Here, the valve is at its extreme upward position. This permits oil to flow into the reverse-range clutch circuit. When the valve is at any other position, the reverse-range clutch exhausts into the manual selector valve bore above the selector valve. 2-18