TM-9-2815-237-34 HMMWV Engine Direct Support & General Support Maintenance Manual Download
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TM 9-2815-237-34 2-16. CYLINDER BLOCK REPAIR This task covers: a. Preinspection c. Inspection b. Cleaning d. Repair lNITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix E, Item 1) Straightedge (Appendix E, Item 15) Feeler gauge (Appendix E, Item 13) Cylinder bore gauge (Appendix E, Item 14) Micrometer (Appendix E, Item 16) Cylinder boring machine (Appendix E, Item 17) Cylinder honing unit (Appendix E, Item 18) Special Tools Camshaft bearing remover and installer (Appendix E, Item 12) Materials/Parts Six protective dust caps (Appendix D, Item 5) Lubricating oil OE/HDO (Appendix B, Item 13) Pipe sealing compound (Appendix B, Item 17) Sealing compound, anaerobic (Appendix B, Item 18) Sealing compound, high temperature (Appendix B, Item 21) Manual References TM 9-2815-237-34P Equipment Condition Engine disassembled into subassemblies (para. 2-15). General Safety Instructions ● Compressed air for cleaning purposes will not exceed 30 psi (207 kPa). ● Protective clothing must be used with steam cleaning. ● Wear eyeshields when using compressed air. a. Preinspection 1. Inspect camshaft bearings (2) for chips, cracks, or scoring. If any bearing (2) is chipped, cracked, or scored, remove all camshaft bearings (2) (para. 2-16.d.3) and hot tank clean cylinder block (1) (para. 2-16.b.1). 2. Measure inside diameter of all camshaft bearings (2). Number one through number four camshaft bearings must be 2.167-2.170 in. (55.041-55.118 mm) and number five camshaft bearing (rear) must be 2.009-2.012-in. (51.028-51.104 mm). If any camshaft bearings (2) do not meet specifica- tions, replace all camshaft bearings (2) (para. 2-16.d.3) and hot tank clean cylinder block (1) (para. 2-16.b.1). 3. If all bearings (2) are to be reused, steam clean cylinder block (1) (para. 2-16.b.2). b. Cleaning 1. Hot tank cleaning. a. Remove six protective dust caps (3) and all plugs (4) from cylinder block (1). b. Clean cylinder block (1) by submerging in tank of heated cleaning solution. c. Run rods with brushes through all oil passages and repeat step 1.b. 2-40