TM-9-2520-234-35 Technical Manual for M109 Transmission XTG-411-2A Download
Page 227 of 323
PAR 230-233 TEST AND ADJUSTMENTS CHAP 5, SEC XXXIV Section XXXIV. TEST AND ADJUSTMENTS 230. GENERAL a. The tests described in this section will determine if the functional operation of the transmission is satisfactory. These tests may be made after rebuild or at any time to determine the condition of the transmission. The tests may be made while the transmission is installed in a vehicle or on a properly equipped test stand. b. These tests will determine wheth- er or not the clutches, torque converter, gearing and hydraulic system are perform- ing properly. c. Adjustments of transmission com- ponents and control linkage must be cor- rect when tests are performed (or cor- rected during tests). When tests are made in the vehicle, the vehicle engine must be properly adjusted and performing effici- ently. Refer to the engine technical man- ual for engine test and adjustment proce- dures. Refer to pars. 233 and 234, below, for transmission test and adjustment pro- cedures. 231. TEST EQUIPMENT a. Transmission Installed in Vehicle. The following equipment testing the transmission stalled in a vehicle. (1) Tachometer gine speed (transmission revolutions per minute. is required when while it is in- to indicate en- input speed) in (2) Oil pressure gage with a range from 0 to 500 psi. b. Transmission Installed on Test Stand. In addition to a properly equipped test stand with a means for driving a transmission (motor or engine of approxi- mately 275 horsepower) and the equipment listed in a , above, the following equipment is required: (1) Shift selector linkage and (2) Steer control linkage and manual control for operating steer control valve. (3) External oil cooler. (4) Control for varying the trans- mission input speed (engine throttle or variable speed electric motor control). c. Test Data Log Sheet. A simple test data log sheet for recording trans- mission performance is illustrated in fig. 367. 232. OIL PRESSURE READINGS Use the oil pressures listed in the test data log sheet as normal values in testing the transmission. 233. TESTS a. Preliminary Instructions. When testing the transmission in a vehicle, the left-output and the right-output drive assemblies will have to be manual control for shifting through all Figure 366. Measuring transmission ranges. oil level Change 2 195