INSTALLATION/ADJUSTMENT - TM-10-4320-310-14

INSPECT/REPLACE CYLINDER HEAD AND VALVE ASSEMBLY (Continued) - TM-10-4320-310-14_119

TM-10-4320-310-14 Pump Unit Flammable Liquid Centrifugal Self-Priming 2-Inch 100 GPM Diesel Engine Driven NSN 4320-01-263-3604 Manual
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TM 10-4320-310-14 5-10. INSPECT/REPLACE CYLINDER HEAD AND VALVE ASSEMBLY (Continued) INSTALLATION/ADJUSTMENT: Too small a clearance will damage piston, cylinder head, and valves. Too large a clearance will result in difficult starting. 1 Adjust cylinder head clearance. a. Install spacers on one long cylinder head stud and one short cylinder head stud. Secure with two hexagon nuts and tighten to hold down cylinder. b. Bring the piston to TDC position. c. Measure the distance between the top of the cylinder and the top of the piston with a measuring device. Subtract measurement from required clearance of 0.0217/0.0256 inch (0.55/0.65 mm). The difference is the thickness of the gasket required for proper cylinder head clearance. NOTE Gaskets come in various thicknesses. If you have a choice between two gaskets, it is best to use the thickest one. d. Remove the two hexagon nuts and spacers. 2 Apply a light coating of grease to both sides of the new cylinder head gasket. Install new cylinder head gasket on cylinder head studs. Align cylinder head gasket to prevent contact with piston. 3 Adjust complete pushrod (2) so dimension A equals 5.8189/5.8268 inches (147.8/148.0 mm). Loosen lower locking nut (7), turn upper adjusting nut (8) to achieve adjustment and tighten lower locking nut to maintain proper adjustment. This adjustment is required for proper engagement of complete pushrod with pinion on decompression shaft. 4 Install new preformed packings (4), shims (5), pressure springs (6) and protection tubes (3) in engine crankcase. 5 Install complete pushrod (2) closest to injection pump side of engine. 6 Install pushrod (1) in engine crankcase on fuel lift pump side. 5-22

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