TM-9-2520-234-35 Technical Manual for M109 Transmission XTG-411-2A Download
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*C1 CHAP 1, SEC II 4. DESCRIPTION PAR 4-7 GENERAL DESCRIPTION AND DATA Section II. GENERAL DESCRIPTION AND DATA (3) Locational terms for the out- put drive assemblies correspond to front, a. General. The Allison Model XTG rear, left and right of the vehicle. 411-2A and XTG 411-4 power trains (figs. 1 through 4) are each a combination of an (4) Rotational terms (clockwise input transfer (drive) section and a main or counterclockwise) will be established transmission section. Right- and left-out- by references in text, or by the viewer’s put drive assemblies are available and are position in illustrations. discussed in this publication. The input transfer section includes a torque conver- ter and transmits engine rotation to the c. Transmission Component Groups. main transmission section. The main trans- The main components of the power train mission section includes range clutches are identified in figs. 5A, 5B and 5C. and gearing, steer clutches, steer plane- Chapter 2 covers the description and tary gearing and vehicle brakes. The out- operation of all components in detail. put drive assemblies include reduction gear planetaries and provide reverse-rota- ting drives to the vehicle tracks. Four 5. DRIVING INSTRUCTIONS forward and two reverse speeds are man- ually selected. The axes of the engine, Refer to the vehicle operator manual main transmission and output drives are parallel. b. Definition of Locational and Directional Terms (1) Locational terms used in de- scribing the power train, are front, rear, right and left. The input transfer section and main transmission section locational terms do not always correspond to vehicle locational terms, while those of the output drive assemblies do correspond. In the vehicle application for which this manual is written, the power train is front- mounted and the locational terms for the input transfer and main transmission sec- tions are opposite those for the vehicle and output drive assemblies (fig. 3). (2) The front of the transmission is always the location adjacent to the en- gine regardless of the manner of mounting in the vehicle. The rear is the location at which the brake inspection covers are mounted. The left is the side to which the input transfer housing is attached. The right is the side on which the brake apply shafts are located (figs. 2 and 3). for instructions. 6. TRANSMISSION OIL Oil may be considered as the lifeblood of a hydraulic transmission. The use of proper oil, and attention to keeping the oil clean, is of paramount importance. The proper oil level must be maintained in the transmission to obtain maximum per- formance. Check the oil level regularly. Clean the oil screens at specified inter- vals. Be very careful that no foreign matter enters the power train system at any time. When changing or adding oil, use only that specified (see “Oil specifi- cations” Table I, TABULATED DATA, par. 7, below). Refer to the operator manual for procedures to be followed in checking the oil level and for changing the oil. 7. TABULATED DATA The following table covers technical data applicable to the Allison XTG 411-2A and XTG 411-4 power trains. 6 Change 2