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GENERAL ENGINE MECHANICAL 6A-49 The grading position for piston outside diameter is rep- Selection Method of Piston Grade for Service Parts. Legend 1. G-mark 4JG2 mm (in) Size Mark Outside Diameter A 95.365 — 95.374 (3.7545 — 3.7549) B 95.375 — 95.384 (3.7549 — 3.7553) C 95.385 — 95.394 (3.7553 — 3.7557) D 95.395 — 95.404 (3.7557 — 3.7561) 4JH1-TC mm (in) Size Mark Outside Diameter A 95.355 — 95.364 (37.5413 — 37.5449) B 95.365 — 95.374 (37.5453 — 37.5488) C 95.375 — 95.384 (37.5492 — 37.5528) D 95.385 — 95.394 (37.5531 — 37.5567) N6A3175E Legend 1. G-mark Piston Clearance mm (in) 4JB1 / 4JB1-TC 0.061 (0.0024) 4JG2 0.066 (0.0026) 4JH1-TC 0.057 — 0.075 (0.0022 — 0.0029) Service piston grade Piston Size Mark Service Parts Grade A AX B AX C CX D CX N6A3176E |