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ARMY TM 9-2815-253-24 AIR FORCE TO 38G1-93-2 MARINE CORPS TM 2815-24/3 CAUTION Excessive camshaft end play affects governing and can cause uneven firing. e. Measure timing gear backlash as follows.  Refer to FIGURE 3-35: (1) Set a dial indicator on timing gear to be measured. (2) Hold gear to be checked and adjoining gear stationary. (3) Move  gear  tooth  side  to  side  in  backlash.    Record  indicated  backlash  Total  Indicator  Reading  (TIR). Standard TIR is 0.004 - 0.007 in.  (0.10 to 0.17 mm) with a limit of 0.012 in.  (0.30 mm). (4) If TIR exceeds limit, replace gear. f. Install governor system.  Refer to paragraph 3-23.4. g. Install fuel injection pumps.  Refer to paragraph 3-13.4. h. Install cylinder head.  Refer to paragraph 3-27.6. i. Install end cover.  Refer to paragraph 3-28.3. FIGURE 3-35.  Measuring Gear Backlash 3-30.  PISTON AND CONNECTING ROD ASSEMBLIES. 3-30.1.  Removal. a. Remove crankcase door.  Refer to paragraph 3-20.2.1. b. Remove cylinder head.  Refer to paragraph 3-27.1. c. If number one piston is to be removed, unscrew oil pressure relief valve and oil strainer from oil pump. d. Rotate crankshaft as necessary to gain access to connecting rod bearing cap capscrews (1, FIGURE 3-36). WARNING To avoid possible Injury, due to sharp edges of machined crankcase face, use a drive socket and not a wrench. CAUTION Number stamped on connecting rod must correspond with number stamped on end cap.  Damage to crankshaft can occur. 3-60


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