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6A – 90 ENGINE MECHANICAL
Piston Grade Selectin Measure the cylinder liner bore after installing the cylinder Refer to “Cylinder Liner Bore Measurement”
Note:
2. Measure the piston diameter. mm (in) 4JA1 70 (2.76) 4JA1T 78 (3.07) 4JB1T 74 (2.91) 4JG2T, 4JH1TC 71 (2.79) 4JA1TC 68.1 (2.68) Grade 4JA1T/4JA1 4JB1T 4JG2T AX 92.979 – 92.994 (3.6606 – 3.6612) 92.974 – 92.989 (3.6604 – 3.6610) 95.369 – 95.384 (3.7547 –3.7553) CX 92.995 – 93.010 (3.6612 – 3.6618) 92.990 – 93.005 (3.6610 – 3.6616) 95.385 – 95.400 (3.7553 – 3.7559) Grade 4JA1TC 4JH1TC
AX 92.945 – 92.964 (3.6592 – 3.6600) 95.359 – 95.374 (3.7543 – 3.7549)
CX 92.965 – 92.984 (3.6600 – 3.6607) 95.375 – 95.390 (3.7549 – 3.7555)
Cylinder Liner and Piston Clearance mm (in)
4JA1T/4JA1 0.041 – 0.071 (0.0016 – 0.0027)
4JB1T 0.046 – 0.076 (0.0018 – 0.0030)
4JG2T 0.051 – 0.081 (0.0020 – 0.0032)
4JA1TC 0.057 – 0.095 (0.0022 – 0.0029)
4JH1TC 0.061 – 0.091 (0.0024 – 0.0036)
Note:
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