TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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3-4. LEFT CYLINDER HEAD REPAIR This task covers: a. Removal c. Installation b. Repair a. Removal INITIAL SETUP: Tools _____ General mechanic's tool kit: automotive (Appendix G, Item 1) Materials/Parts _____________ Gasket (Appendix E, Item 18) Antiseize compound (Appendix B, Item 7) Pipe sealing compound (Appendix B, Item 49) Cylinder head lifting device (optional) (Appendix C, Figure C-48) Personnel Required ________________ One mechanic One assistant Manual References ________________ TM 9-2320-280-20 TM 9-2320-280-24P TM 9-2815-237-34 TM 9-2815-237-34P Equipment Condition _________________ • Fuel drain back tube removed (TM 9-2320-280-20). • Alternator brackets removed (TM 9-2320-280-20). • Left exhaust manifold removed (TM 9-2320-280-20). • Water crossover removed (TM 9-2320-280-20). • Rocker arm shaft and pushrods removed (para. 3-8). • Fuel injection return hoses removed (TM 9-2320-280-20). • Fuel injection nozzles removed (para. 4-3). • Glow plugs removed (TM 9-2320-280-20). • Modulator linkage removed (TM 9-2320-280-20). General Safety Instructions ______________________ • Cylinder head must be supported during removal and installation. • Gaskets installed on some 6.2L engines assembled prior to 1991 may contain asbestos. Gaskets should be disposed of IAW current directives. Maintenance Level _______________ Direct support TM 9-2320-280-34 3-8 Change 1 1. Disconnect harness lead 33B (8) from engine temperature sending unit (7). 2. Remove capscrew (1) and two leads 58A (2) and 3A (3) from cylinder head (4). WARNING • Cylinder head must be supported during removal and installation. Failure to support cylinder head may cause injury to personnel or damage to equipment. • Gaskets installed on some 6.2L engines assembled prior to 1991 may contain asbestos. Gaskets should be removed with a scraper or putty knife and then disposed of IAW current directives. Inhalation of asbestos fibers can cause respiratory ailments CAUTION Cover or plug all hoses, ports, and/or fittings immediately after disconnection or component removal to prevent contamination. Remove all plugs prior to connection. NOTE The left cylinder head replacement procedures for 1990 and above engines and previous model engines are the same. Refer to engine decal model number on left rocker arm cover before ordering replacement parts, since parts are not interchangeable.