TM 10-4320-344-244.4.1 Cylinder Head Assembly, Intake Valve, and Exhaust Valve Maintenance, Model 609-A. (Continued)If valve guides are to be replaced, they must be replaced prior to anyrefinishing on the valve seats.j .Replace excessively worn or damaged valve guides (16).Position valve guides(16) so that distance between gasket surface of cylinder head (6) and bottomof valve guide (16) is 1.3800 inches (35.0520 mm).k.After installing new valve guides (16) ream the inside diameter to correct anysqueezing or distortion.Ream intake valve guides (16) to 0.3740 inches(9.4496 mm) to 0.3750 (9.5250 mm).Ream exhaust valve guides (16) to 0.3750inches (9.5250 mm) to 0.3760 inches (9.5504 mm).If valve seats are pitted or new valve guides were installed the valve seatsmust be refinished.l .Grind valves (11 and 15) valve seats of cylinder head (6) sufficiently toremove pits and burrs. Valve seat angles are 30° for intake valves and 45° forexhaust valves.m.Make ten or twelve pencil marks, equally spaced,head (6).across valve seat in cylindern.Insert valve (11 or 15) in valve seat of cylinder head (6), apply pressurefirmly, and rotate valve (11 or 15) in valve seat of cylinder head (6).o .Remove valve (11 or 15) from valve seat inpencil marks.If all pencil marks are notn.4.4.1.3 Assembly.a .b .c .d .e.Assemble valves in the sameground must be assembled inLubricate stems of valvescylinder head (6)rubbed out repeatand inspectsteps 1 throughseats to which they were ground.Valves notthe same seats from which they were removed.(11 and 15) with a few drops of oil and insert theminto the valve seats on cylinder head (6) to which they were ground or fromwhich they were removed.Remove tags.Using a valve spring compressor install valve springs (14), valve rotator(13), and seat lock (12) on stems of exhaust valves (15).Insert intake valve inserts (10) over ends of intakeexposed ends of valve guides (16).Using valve spring compressor, install valve springsseat (8) and seat lock (7).Turn cylinder head (6) on the exhaust manifold side.valves (11).Secure on(9), valve spring4-6
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business