TM 9-2520-246-34-1 FRAME 3 NOTE Readings must be within limits given in table 2-21. The letter L indicates a loose fit and the letter T indicates a tight fit. If readings are not within given limits, throw away part and get a new one. 1. Measure fit of two gears (1) on two countershaft gear surfaces (2). 2. Measure fit of two keys (3) in two countershaft keyways (4). 3. Measure fit of two bearings (5) on two countershaft bearing surfaces (6). END OF TASK Table 2-21. Countershaft Assembly Fits and Tolerances Index Number 1 and 2 3 and 4 5 and 6 Item/Point of Measurement Fit of gear on shaft Fit of key in keyway Fit of bearing on shaft Size and Fit of New Parts (inches) 0.0005T to 0.0025T 0.0010L to 0.0020T 0.0005T to 0.0015T Wear Limit (inches) 0.0010L .0030L None 2-181