(3) Heat the gear in oil to a temperature of 350°- 400° F.(4) Using asbestos gloves, position the gear onthe camshaft and align the gear keyway with the keyin the camshaft.(5) press the gear onto the shaft until the gearhub is flush with the front end of the camshaft.(6) Check the clearance between the thrust plateand bearing journal.The end play clearance is.0027 to 0.0083 inch.(7) Check camshaft journal to bearing runningclearance.(8) Oil the camshaft bearings in the cylinderblock and carefully insert the camshaft. Be carefulnot to scratch or mar the camshaft bearings.(9) Before camshaft is completely inserted incylinder block, position thrust plate in place.NOTEMake certain the timing marks on camshaftgear and crankshaft gear are aligned whencamshaft is installed (fig. 14-25).(10) Install the capscrews through the thrustplate. Tighten the capscrews to a torque of 18 to20 foot -pounds.(11) Check the camshaft gear backlash. Thebacklash between the mating gears of the crankshaftand the camshaft is 0.0015 to 0.-009 inch. The back-lash between the mating gears of the hydraulic pumpand camshaft is O. 003 to O. 011 inch.c. Cylinder Head Reassembly and Installation.(1) Make certain that the machined surfaces ofthe cylinder block and the cylinder head are thoroughlyclean. A new cylinder head gasket must be used be-fore installing the cylinder head.CAUTIONBefore the cylinder head is installed, makecertain that there is not an excessive amountof oil, or any other liquid, in the capscrewholes in the cylinder block. Too much oil inany of these holes may cause a hydrostatic lockand crack the cylinder block when the capscrewis tightened.(2) Thoroughly clean top deck of cylinder blockunderside of cylinder head.(3) Make certain that the cylinder sleeve stand-out is within the specified limits. The standout ofeach cylinder sleeve is 0.002 inch to 0.005 inch abovethe top flat surface of the cylinder block.NOTECorrect standout, if necessary, by recondi-tioning sleeve seat in the block and installi~sleeve shims under cylinder sleeve flange toobtain the 0. 002-inch to 0. 005-inch protrusion.(4) Install a new cylinder head gasket over thetwo dowel pins and onto the cylinder block with theindicated side down, as stamped on the gasket. Donot use any sealer or gasket dope. The gasket assupplied has been pre-coated with a phenolic sealerand an anti-stick compound.(5) Use a sling and position the cylinder headover the dowel pins and onto the cylinder block.(6) Lubricate threads of 20 short cylinder headcapscrews with light coat of engine oil and install withhardened washers in cylinder head. Tighten capscrewsto 90 to 110 foot -pounds following sequence shown infigure 14-42. (Sect ion A).(7)T i g h t e n t h e 2 0 c y l i n d e r h e adc a p s c r e w s I n t h e n u m e r i c a l s e q u e n c e I nf i g u r e 1 4 - 4 2,S e c t i o n A t o 1 5 5 - 1 65f o o t - p o u n d t o r q u e .CAUTIONTorque figures in this and following steps arebased on engine oil lubricated threads andunder cap screw heads. To prevent over-stressing of capscrew, use engine oil only.Other lubricants may- cause extreme pressure.(8) Position rocker arms, shaft, and bracketsassembly on cylinder head and align rocker arm ad-justing screws in the push rod cup ends. Install thesix long capscrews; also install the six 3/8 inch cap-screws and lockwashers in the rocker arm brackets.Tighten the 1ong capscrews, starting at the center ofthe head and working alternately towards each end,to a torque of 90-100 foot-pounds and the 3/8 inchcapscrews to a torque of 28-33 foot -pounds.NOTELubricate threads and under capscrew headswith a light coat of engine oil before installing.(9) Tighten the 26 cylinder head capscrews inthe numerical sequence in figure 14-42 to 155-165foot -pounds torque.(10)T i g h t e n t h e 6 c y l i n d e r h e adc a p s c r e w s I n t h e n u m e r i c a l s e q u e n c e Inf i g u r e 1 4 . 4 2 ( S e c t i o n B ) .Torquec a p s c r e w s t o 1 5 5 - 1 6 5 f o o t - p o u n d s.1 4 - 86Change 5
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