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Fig.51 Fig.52
Unit: mm 480E *dia. of piston skirt (mm) Factory group 1 79.915 – 79.925 2 79.925 – 89.935 3 79.935 – 79.945 4 79.945 – 79.955 Factory repair A 80.205 – 80.215 B 80.215 – 80.225 C 80.225 – 80.235 Spare parts Standard 79.965 – 79.975 Oversize 0.29 80.245 – 80.255 Oversize 0.5 80.465 – 80.475 * 480M piston should be applied on 480E engine – Measure the diameter. of the hole of piston pin
Unit: mm 480 diameter of the piston pin hole White 20.630 – 20.633 Red 20.633 – 20.636 Blue 20.636 – 20.639 – Measure the diameter of piston pin
Unit: mm 480 diameter of the piston pin hole White 20.622 – 20.625 Red 20.625 – 20.628 Blue 20.628 – 20.631 – Measure cotter intermission of piston ring First compression ring 0.30 – 0.50mm Second compression ring 0.30 – 0.50mm Steel combination oil ring 0.40 – 1.40mm – Measure the piston ring end play in the piston groove Unit: mm Piston ring height Piston ring groove size Fit clearance First compression ring 1.60 0 - 0.012 1.6 + 0.06 + 0.04 0.050 – 0.082 Second track compression ring 2.0 0 - 0.012 2.0 + 0.06 + 0.04 0.050 – 0.082 Oil control ring blade 0.61 ± 0.025 4.0 + 0.03 0.01 0.01 – 0.23 Oil control ring 2.68 ± 0.05 Cast iron oil control ring 4.0 - 0.015 - 0.025 4.0 + 0.03 + 0.01 0.025 – 0.055 |