TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202=34 SECTION 111. ENGINE 4-33. PISTON AND CONNECTING ROD DISASSEMBLY/ASSEMBLY MAINTENANCE (CROSS-HEAD) ● This task covers: a. Removal b. Disassembly c. Cleaning d. Inspection e. Fitting Piston f. Fitting Piston Rings g. Assembly h. Installation-Cylinder Kit Assembly ● INITIAL SETUP MODELS ■ All * TOOLS AND SPECIAL TOOLS General mechanics tool kit (App B, Item 96) Piston ring pliers (App B, Item 66) Micrometer 1-2 inch (App B, Item 65) Piston pin retainer installer (App B, Item 57) Piston pin retainer leak detector (App B, Item 63) Piston ring compressor (App B, Rem 12) Cylinder liner hold down clamps (App B, Item 11) Spring scale (App B, Item 24) Feeler gage set (App B, Item 24) Torque wrench (App B, Item 101) Micrometer O-1 inch (App B, Item 65) Micrometer 4-5 inch (App B, Item 65) Piston groove gage (App B, Item 36) Ridge reamer (App B, Item 72) Ball attachment (App B, Item 6) MANDATORY REPLACEMENT PARTS 2 Rings (App F, Item 125) 1 Ring (App F, Item 124) 2 Rings (App F, Item 122) ■ 1 Ring (App F, Item 169)** 2 1 2 2 2 1 Expanders (App F, Item 13) Ring (App F, Item 120) * Piston pin retainers (App F, Item 118) Piston pin bolts (App F, Item 5) Piston pin bolt spacers (App F, Item 157) Seal ring (App F, Item 142) EXPENDABLE/DURABLE SUPPLIES Flat stone (App C, Item 43) Carbon-removing compound (App C, Item 7) Plastic gage (App C, Item 30) Engine oil (App C, Item 16) International compound no. 2 (App C, Item 24) Wood block (App C, Item 46) Crocus cloth (App C, Item 12) Fuel oil ( App C, Item 21) ● EQUIPMENT CONDITION Para Description 4-20 Oil pan removed 4-27 Cylinder head removed 4-31 Oil pressure regulator and relief valve removed 4-32 Oil pump and oil pump tubes removed + * Applies to engine serial number 8VA-294357 and above for models 7083-7398 and 7083-7399. n - ** Model 7083-7391 only. m a. Removal CAUTION f RIDGE -1 Remove ridge at top of liner or piston ring breakage can occur. ● (1) 4-132 Remove carbon deposits and ridge from upper inner surface of cylinder liner (1) using ridge removing tool. lllaoooo~ e Change 1