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b. Cleaning/Inspection - TM-9-2320-364-34-4_251
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TM-9-2320-364-34-4 Palletized Load System (PLS) M1074/M1075 Manual
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Using a micrometer and telescoping gage
TM 9-2320-364-34-4      20-201 Protect machined surfaces of camshaft from damage due to contact with V blocks by folding rags over V block. (10) Support crankshaft on two machined V blocks at the front main journal (12) and rear main journal (13). NOTE Maximum runout for journals 2 and 4 is 0.002 in. (0.051 mm). Maximum runout for main bearing journal 4 is 0.004 in. (0.102 mm). Difference between runout measure- ments for two adjacent journals must not exceed 0.003 in. (0.076 mm). When runout high spots of adjacent journals are at right angles to each other, sum of their runout measure- ments must not exceed 0.004 in. (0.102 mm). Replace crankshaft if runout is not within specifications. (11) Using dial indicator, measure crankshaft runout at journals (14), (15), and (16).  Rotate crankshaft one complete turn.  Record readings and note locations of runout high spots on journals. (12) Install two more machined V-blocks under two journals to support crankshaft. NOTE If any crankshaft journal is not within specification, replace crankshaft. (13) Using a micrometer, measure crankshaft journals.  At point A measure around shaft at points C through F. At point B measure around the shaft at points C through F.  Compare measurements with the following limits. (a) Diameter of main bearing journals (12), (13), (14), (15) and (16) must be minimum of 4.4985 in. (11.4262 cm) and maximum of 4.5002 in. (11.4305 cm). (b) Connecting rod journals (17) diameter must be minimum of 2.9985 in. (7.616 cm) and maximum of 3.0002 in. (7.6205 cm). (c) Check main bearing journals (12), (13), (14), (15) and (16) and connecting rod journals (17) for out-of-round.  Journal out-of-round must not exceed 0.0005 in. (0.0127 mm). (d) Check main bearing journals (12), (13), (14), (15) and (16) for taper.  Taper must not exceed 0.004 in. (0.102 mm). (e) Check connecting rod journals (17) for taper.  Taper must not exceed 0.004 in. (0.102 mm) (half width) and 0.008 in. (0.203 mm) (full width).

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