Track pad wear indicator

1. A track pad for a track type mobile machine having a sprocket and an idler wheel, the track pad comprising:

a first link having a rail surface configured to engage the sprocket and the idler wheel;

a second link oriented generally parallel with the first link and having a rail surface configured to engage the sprocket and the idler wheel;

a ground engaging element connected to the first and second links at a side opposite the rail surfaces; and

a wear indicator formed within the rail surface of at least one of the first and second links, wherein the wear indicator includes a plurality of recesses formed within the rail surface of at least one of the first and second links.

2. The track pad of claim 1 , wherein each of the plurality of recesses has a different depth.

3. The track pad of claim 1 , wherein the plurality of recesses are formed in a line along a length direction of the at least one of the first and second links.

4. The track pad of claim 1 , wherein the plurality of recesses are formed in a grid pattern.

5. The track pad of claim 1 , wherein the wear indicator includes at least one hole drilled into the rail surface of at least one of the first and second links.

6. The track pad of claim 1 , wherein the wear indicator includes at least one chevron recessed within the rail surface of at least one of the first and second links.

7. The track pad of claim 1 , wherein the wear indicator includes at least one alpha-numeric symbol recessed within the rail surface of at least one of the first and second links.

8. The track pad of claim 1 , wherein the wear indicator is formed within the rail surfaces of both the first and second links.

9. The track pad of claim 1 , wherein:

the wear indicator is a first wear indicator; and

the track pad further includes:

a drive surface located between the first and second links and configured to engage lugs of the sprocket; and

a second wear indicator formed within the drive surface.

10. The track pad of claim 1 , wherein the first link, the second link, and the shoe are formed as a single integral component.

11. A method of retrofitting a track of an existing track type machine with a track pad wear indicator, the method comprising:

measuring an amount of wear in links of a track pad forming a portion of the track; and

fabricating at least one recess within a least one of the links of the track pad, the at least one recess corresponding with the amount of wear measured in the links.

12. The method of claim 11 , wherein fabricating the at least one recess includes fabricating a plurality of recesses, each of the plurality of recesses corresponding with a different amount of material that can be worn away before the track pad should be replaced.

13. The method of claim 12 , wherein fabricating the plurality of recesses includes fabricating the plurality of recesses to each have a different depth.

14. The method of claim 11 , wherein fabricating the at least one recess includes drilling at least one hole.

15. The method of claim 11 , further including disconnecting a master link of the track to expose a rail surface of the at least one of the links.

16. The method of claim 11 , wherein fabricating at least one recess within a least one of the links includes fabricating at least one recess within each of the links of the track pad.

17. The method of claim 11 , wherein:

the track pad is a first track pad; and

the method further includes:

measuring an amount of wear in links of additional track pads forming a portion of the track, a number of the additional track pads being less than all of a remaining number of track pads; and

fabricating at least one recess within a least one of the links of each of the additional track pads.

18. The method of claim 11 , further including:

measuring an amount of wear in a drive surface of the track pad; and

fabricating at least one recess within the drive surface to have a depth corresponding to the amount of wear measured in the drive surface.