Usage:
| NOTICE |
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The new 7N5037 Piston Group is the replacement for the 6N6642 Piston Group that was formerly used in current 6.25" (158.8) bore 6 cylinder engines. The new piston group can also be used as a replacement for the 3S5502 Piston Assembly that was used in earlier 6.25" (158.8) bore, 6 cylinder engines. |
The position of the top ring on the new piston is .040" (1.02) higher (nearer the top of the piston body) than it was on the former piston body. Do not install the new piston into a cylinder liner that has been used with either the 6N6642 Piston Group or the 3S5502 Piston Assembly unless the wear ridge, that is toward the top of the cylinder liner, is removed according to the procedure given in Special Instruction Form SEHS7220. If the wear ridge is not removed, the result will be immediate damage to the top ring or the piston, at the time of engine start-up.