Patent ID: 7625154

Claim:
A method of using a replaceable leading edge section for a plow used in installing utilities in the ground, the leading edge section comprising: i) a front edge; and ii) a side opposite the front edge including a sealing surface and fluid passage void; said method comprising: (a) securing the leading edge section to a plow blade comprising a front surface, a top end and a bottom end; (b) providing a fluid passage in the fluid passage void of the leading edge section and the front surface of the blade when the leading edge section is secured to the front surface of the blade; (c) providing a gap between the sealing surface of the leading edge section and the front edge of the blade; and (d) providing a plurality of openings at different vertical positions which are in fluid communication with the gap between the sealing surface of the leading edge section and the blade whereby fluid can pass through the fluid passage to the gap and then to the plurality of openings for providing fluid to lubricate the leading edge section as it passes through the ground.