TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM 9-2815-202-34 4-33. PISTON AND CONNECTING ROD MAINTENANCE (Cont) (3) Piston and Connecting Rod Assembly to Cylinder Liner (a) Apply clean engine oil to piston, rings, and inside surface of piston ring compressor. NOTE Inspect ring compressor for nicks or burrs, especially at nontapered inside diameter end. Nicks or burrs on inside diameter of compressor will result in damage to piston rings. (b) (c) (d) (e) Place piston ring compressor (27) on wood block, with tapered end of ring compressor facing up. Stagger piston ring gaps 90° apart on piston. Make sure ends of oil control ring expanders are not overlapped. Start top of piston straight into ring compressor (27). Then push piston down until it contacts wood block. Place liner (1) with flange end down on wood block. Note position of matchmark on liner. NOTE Numbers on side of connecting rod and cap identify rod with cap and indicate particular cylinder in which they are used. (f) (g) Place ring compressor (27) and piston and connecting rod assembly (28) on liner (1) with numbers on side of connecting rod and cap aligned with matchmark on liner. Push piston and connecting rod assembly (28) down into liner (1) until piston is-free of ring compressor (27). CAUTION Do not force piston into liner. Expanders apply considerable force on oil rings; therefore, extra care must be taken during loading operation to prevent ring breakage. (h) Remove connecting rod cap and ring compressor. Then push piston down until compression rings pass cylinder liner ports. 4-142 Change 1