TM 10-4320-344-24 4.4.22 CrankcaseMaintenance,Models609-CandUS636HCCD-1. (Continued)To prevent the possibility of embedding foreign objects in the eyes, safetyglasses must be worn when using compressed air.b.c .d.e .f .g .h.i .j .k.l .m.Remove crankcase (1) from tank of cleaning solvent and using compressed air,dry thoroughly.Place crankcase (1) on suitable engine stand and removed e v i c e.Inspect crankcase (1) for cracks, leaks, or damage. Ifleaking, or damaged, replace crankcase.s l i n g a n d l i f t i ngcrankcase is cracked,Inspect cylinder bores and cylinder seating surface of crankcase (1) forscoring, burrs, discoloration, pits, or damage.If scoring, burrs,discoloration, pits, or damage is present, replace crankcase (1).Inspect deflector plate (15) for bends, cracks, or deformations.Inspect for leaks around oil dipstick bushing (19).If leaks are present,remove oil dipstick bushing (19), apply sealant to oil dipstick bushing (19)and install in crankcase (1).Inspect for leaks around plugs (20 and 21).If leaks are present, removeplugs (20 and 21), apply sealant to plugs (20 and 21) and install in crankcase( 1 ).Inspect sleeve bushing (22) for bends, cracks, or deformations.Inspect all components for damage.Install crankshaft bearing caps in accordance with the installation proceduregiven in paragraph 4.4.20 and using micrometer, check crankshaft bearingjournal bores for the dimensions listed in Table 4-18.If the journal boresdo not meet the specifications, discard crankcase.Table 4-18.Crankshaft Bearing Journal Bore Dimensions.Mode 1Dimensions609-c3.0512-3.0519 inches (77.500-77.519 mm)US636HCCD-13.1102-3.1110 inches (79.000-79.019 mm)Inspect cylinder seat surfaces of crankcase (1) for scratches, burrs, pits, ordamage.If damage is present, resurface damaged cylinder seat surfaces ofcrankcase (1) using refacing device.Replace all damaged components.On Model 609-c install six new lock washers and oil nozzles in the bearing websof the crankshaft bearings.a .Install new camshaft bearing bushing (18). Ensure oil hole in camshaftbearing bushing (18) is in line with oil hole in crankcase (1).b .Install flat washer (17) and plug (16).4-824.4.22.3 Installation.NOTE
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