6-4TM 5-4930-227-14Figure 6-5. Engine base and oil pump, removal andinstallation.6-6. Piston and Connecting Roda. Removal.(1) Remove the engine base (para 6-5).(2) Remove the cylinder head (para 6-2).(3) Refer to figure 6-7 and remove the pis-ton and connecting rod.b. Disassembly. Refer to figure 6-8 and disas-semble the piston and connecting rod.c. Cleaning, Inspection, and Repair.(1) Clean all parts with an approved clean-ing solvent and dry thoroughly.(2) Inspect all parts for cracks, breaks, andother damage. Replace a damaged or defectivepart.(3) Inspect the mounting hardware for dam-aged or stripped threads. Replace a damaged ordefective part.d. Reassembly.semble the pistonRefer to figure 6-8 and reas-and connecting rod.6-7. Crankshafta. Removal.(1) Remove the piston and connecting rod(para 6-6).(2) Refer to figure 6-9; remove the crank-shaft.b. Disassembly. Refer to figure 6-10 and dis-assemble the crankshaft.c. Cleaning, Inspection, and Repair.(1) Clean all parts with an approved clean-ing solvent and dry thoroughly.(2) Inspect crankshaft for scoring. Homecrankshaft to remove any slight scoring or replacea damaged or defective crankshaft.(3) Inspect the bearing cones and cups. Re-place a defective assembly.(4) Inspect the gear and woodruff key forwear or other damage. Replace defective parts.(5) Inspect the hardware for stripped ordamaged threads, rust, or damage incurred duringremoval. Replace damaged or defective parts.d. Reassembly. Refer to figure 6-10 and reas-semble the crankshaft.e. Installation.(1) Refer to figure 6-9 and install thecrankshaft.(2) Install the piston and connecting rod(para 6-6).6-8. Camshaft and Governor Assemblya. Removal.(1) Remove the crankshaft (para 6-7).(2) Refer to figure 6-11 and remove thecamshaft.b. Disassembly. Refer to figure 6-11 and dis-assemble the camshaft and governor.c. Cleaning, Inspection and Repair.(1) Clean all parts with an approved clean-ing solvent and dry thoroughly.(2) Inspect the camshaft for alinement, scor-ing, roughness, or damaged or chipped gear teeth.(3) Repair any slight roughness by honingor replace a damaged or scored camshaft.(4) Replace a badly damaged or worn sleevebearing, spacer, or pin.d. Reassembly. Refer to figure 6-11 and reas-semble the camshaft and governor.e. Installation.(1) Refer to figure 6-11 and install cam-shaft.(2) Install the crankshaft (para 6-7).
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