ENGINEPISTON AND RODPISTON AND ROD REMOVAL1.2.3.4.5.6.7.8.start by:a) remove head assemblyRemove four bolts and lockwashers (1).Remove cover (2) and seal (3).Remove four bolts and lockwashers (4).Remove cover (5) and gasket (6).Put matching identification marks on therod cap (7) and piston rod (8) to ensurecorrect assembly.Remove bolts (9) and rod cap (7), thenremove piston and rod (8) from the crank-case.Put matching identification marks on thepiston and the rod to ensure correct assem-bly.Remove retaining ring from wrist pin (10)and push pin from piston and rod.Clean all parts.Remove piston rings (11) and oil rings (12).Clean ring grooves in piston (13) with a pieceof hard wood.INSTALL PISTON AND ROD1.2.3.Inspect piston for scoring, cracks, or en-larged ring grooves. Replace piston if any ofthese conditions exist.Check wrist pin installation. If pin can beinserted through the piston and rod withonly slight pressure, fit is acceptable, If pinis a loose fit, the piston and rod assemblymust be replaced.Install piston rings (1) and oil rings (2). Thegap for each ring must not be near the pistonpin bore, and each gap must be approxi-mately 1200 from the gap in the next ring.TM 5-3805-258-24-2DISASSEMBLY AND ASSEMBLY5-18d
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