TM-9-2520-254-34 Direct Support for M113 TX100-1 Transmission 2520-00-066-4240 Download

S/1 ijl ‘1’bird Iockop to third converter (At closed throttle, this downshift slIookf occor at 1,200 to 1,300 rpm. 1 Third converter to second Iockop %wond lockup to secomf converter Swood converter to first lockup First lockup to first converter (At closed throttle a downshift from third converter to first converter occurs at 600 to 800 rpm engine speed.) NOTE To convert engine speed readings, for the M113A1 family of vehicles, to trans- mission input speed, multiply engine speed by 1.286. e. Lockup Shift Points. During full-throttle operation "at detent, ” the lockup clutch should engage when front governor (G1) pressure reaches 44 psi. NOTE All tests in d and e above are based on proper adjustment of the throttle valve (TV) linkage. f. Inhibitor Functional Check, 3-2 Downshift. (1) Disconnect transmission output from vehicle. drive line. (2) Disconnect throttle valve linkage, and rotate throttle valve lever on transmission coun- terclockwise until it reaches its internal stop. (3) Place manual selector control in 1-3 position, and accelerate engine to 2,000 rpm. (4) Shift to 1-2 position, and slowly decrease engine speed. The 3-2 automatic downshift should occur at 1,560 to 1,830 rpm engine speed. (5) If the 3-2 automatic downshift occurs at a speed higher than 1,830 rpm, it is an indication that the high-to-intermediate inhibitor valve is sticking in its bore and not opening. If the downshift speed point is lower than 1,560 rpm, it is an indication that the valve is either sticking in its bore in an open position or that the inhibitor valve spring is faulty. g. Inhibitor Functional Check, 2-1 Downshift. (1) Perform steps (1) and (2) as directed in f above. (2) place manual selector control in the 1-2 position, and accelerate engine to 2,000 rpm. (3) Shift to l-position, and slowly decrease engine speed. The 2-1 automatic downshift should occur at 1,560 to 1,790 rpm engine speed. (4) If the 2-1 automatic downshift occurs at a epeed higher than 1,790 rpm, it is an indication that the intermediate-to-low inhibitor valve is sticking in its bore and not opening. If the Engine speed at full throttle At drtm[ Through decent 1 ..ioo” to 1,700 rpm 1,700 to 1,800 rpm 1.000 to 2.000 rpm 1,950 to 2,150 rpm 1,.300 to 1,700” rpm 1,700 to 1,800 rpm 1,900” to 2.()()() rpm l,9Fr Oto2,100rpnl 1,500 to 1 ,?00 rpm 1,700 to 1,800 rpm downshift speed point is lower than 1,560 rpm, it is an indication that the valve is either sticking in its bore in an open position or that the inhibitor valve spring is faulty. NOTE To convert engine speed readings, for the M113A1 family of vehicles, to trans- mission input speed, multiply engine speed by 1.286. 5-63. Adjustments a. Manual Selector Linkage. Proper adjustment of the manual selector linkage is important for proper vehicle performance. Refer to end item organizational manual for procedures. b. Throttle Linkage Underscored. There are two adjustments which must be made for throttle linkage. One is internal and must be made before the oil pan is installed. The other is external and is made after instilling the transmission in the vehicle. The internal adjustment concerns ad- justment and locking of the headless screw in the throttle valve retainer at the rear of control valve assembly (fig. 5-146). NOTE This adjustment is necessary only when a replacement control valve assembly (3, fig. 5-82) or valve body (42, fig. 5-82) is in- stalled. The adjustment, if required, is made as follows: (1) On original control valve assembly, measure distance between rear of throttle valve (depressed until it bottoms) and front of throttle valve stop screw. Record this dimension (fig. 5- 146). (2) On new control valve assembly, adjust stop screw until distance between rear of depressed throttle valve and front of stop screw corresponds exactly with measurement made in (1) above. (3) Lock stop screw by crimping threaded portion of retainer against flat side of stop screw (fig. 5-146). (4) The external adjustment concerns the linkage connecting the accelerator pedal, engine fuel control, and transmission throttle adjustment is extremely important matches the transmission function to lever. This because it the engine 5-65