TM 5-3805-258-24-2ENGINEDISASSEMELY AND ASSEMBLYCRANKSHAFT AND GEARCAUTIONMake sure part number on cap is toward frontof engine, and number on bottom of cap is thesame as number on block when caps are in-stalled.5.6.7.8.9.10.11.Clean the Nos. 2, 3 and 4 main bearing caps.Install new bearings in the caps. Put clean en-gine oil on the bearings, bolts, threads and sur-faces of the washers for the caps.Check the bearing clearance with Plastigage(A). Install the caps and tighten the bolts to atorque of 41 ± 4 N·m (30 ± 3 lb.ft.). Put amark on each bolt head and the bearing caps.Tighten the bolts 90° more. Remove the bear-ing caps and measure the width of the Plasti-gage. The main bearing clearance (Plastigagewidth) with new bearings must be 0.076 to0.165 mm (.0030 to .0065 in.). The maximumpermissible clearance with used bearings is0.25 mm (.010 in.).Put the caps in position on the engine and in-stall the washers and bolts. Tighten the bolts toa torque of 41 ± 4 N·m (30 ± 3 lb.ft.). Put amark on each bolt head and the bearing caps.Tighten the bolts 90° more.Remove the Nos. 1 and 5 main bearing caps.Follow the procedure in Steps 5 and 6 andcheck the main bearing clearance for the Nos. 1and 5 main bearings.Follow the procedure in Step 7 and install theNo. 1 main bearing cap.Put clean engine oil on thrust bearings (1).Install the bearings with the steel back againstthe cylinder block. Install the No. 5 main bear-ing cap. Tighten the bolts for the cap with theprocedure in Step 7.Check the crankshaft end play with tool group(B). The end play is controlled by the thrustbearings on the No. 5 main. The end play withnew bearings must be 0.064 to 0.368 mm(.0025 to .0145 in.). The maximum permissibleend play with used bearings is 0.64 mm (.025in.).NOTE: If a replacement has been made for any ofthe timing gears, it will be necessary to check theengine timing to make sure it is correct. See IN-STALL FUEL INJECTION PUMP HOUSINGAND GOVERNOR.end by:a) install pistonsb) install timing gear coverc) install hydraulic pump gear train5-146
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