6-7. Crankshaft

Figure 6-6. Engine base and oil pump, disassembly and reassembly

TM-5-4930-227-14 Lubricating and Servicing Unit: Power Operated Trailer Mounted 15 CFM Compressor Reciprocating Gasoline Engine Driven Manual
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6-4 TM 5-4930-227-14 Figure 6-5. Engine base and oil pump, removal and installation. 6-6. Piston and Connecting Rod a. 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, and other damage. Replace a damaged or defective part. (3) Inspect the mounting hardware for dam- aged or stripped threads. Replace a damaged or defective part. d. Reassembly. semble the piston Refer to figure 6-8 and reas- and connecting rod. 6-7. Crankshaft a. 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. Home crankshaft to remove any slight scoring or replace a damaged or defective crankshaft. (3) Inspect the bearing cones and cups. Re- place a defective assembly. (4) Inspect the gear and woodruff key for wear or other damage. Replace defective parts. (5) Inspect the hardware for stripped or damaged threads, rust, or damage incurred during removal. 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 the crankshaft. (2) Install the piston and connecting rod (para 6-6). 6-8. Camshaft and Governor Assembly a. Removal. (1) Remove the crankshaft (para 6-7). (2) Refer to figure 6-11 and remove the camshaft. 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 honing or replace a damaged or scored camshaft. (4) Replace a badly damaged or worn sleeve bearing, 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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