TM-9-2520-234-35 Technical Manual for M109 Transmission XTG-411-2A Download
Page 234 of 323
*C2 PAR 235 CHAPTER 6 REPAIR AND REBUILD STANDARDS 235. GENERAL a. Wear Limits and Points of Measure- ment. Data covering the sizes and fits of new parts and wear limits information, is given in pars. 236 through 249, below. Points of meas- urement of all critical dimensions are indi- cated by small letters in the exploded view parts groups, figs. 373 through 386, fold-outs 2 through 15. b. T-Tight, L-Loose. The "Size and Fit of New Parts" column includes the manufacture dimensions and tolerances, and the fits of mat- ing parts. T denotes a tight (interference) fit; L denotes a loose (clearance) fit. c. Meaning of Wear Limits (1) The wear limits indicate the dimen- sions to which a part may wear before it must be replaced. Normally, any part not worn be- yond its wear limit will be approved for con- tinued use, if it is not otherwise damaged. (2) A single asterisk (*) in the wear limits column indicates that the part should be replaced when worn beyond the limits stated in "Size and Fit of New Parts" column. (3) A double asterisk (**) indicates a limit applying to the fit between mating parts. In such cases, wear is allowed on either or both mating parts so long as the fit is within the specified limit. d. Standard Torque Listings. Standard torque to which bolts, nuts and screws are to be tightened is listed in par. 250 under Table V. STANDARD TORQUE SPECIFICATIONS. These are normal torque values - special torques are listed in the copy pertinent to the applicable parts. 202