TOOL-MOIL POINT 3555876 - Caterpillar

Excavator AllWheel Loader AllIntroduction
A portion of each base cutting edge has been designed as a structural part of the bucket. The basic dimensions of the structural piece are increased to provide material that can be worn away without risking damage to the bucket.Measurements of a base edge can determine how much of the protective "wear material" remains. When that wear material is gone, the base edge should be replaced to avoid possible damage to the structural part of the bucket.Procedure to Measure Wear on Bucket Base Edges
The following procedures describe how to measure a base edge.
Tilt the bucket back to allow easy access to the edge.
Illustration 1 g02854418
Front View of Bucket Corner
(A) Base edge
(B) Bucket corner
(C) Weld
(D) Thickness of edge
Determine where the thickness measurements will be made.
Buckets with No Teeth: Measure near each end of the bucket just inside the corner welds. Refer to Illustration 1
Buckets with Teeth: On buckets with corner teeth, measure mid-way between the last two teeth at each end of the bucket. On buckets without a tooth in the corner, measure just inside the corner welds and midway between the last two teeth at each end of the bucket. Measure a total of four places. Refer to Illustration 1.
Illustration 2 g02854422
End View of Bucket Cutting Edge
(D) Thickness of edge
(E) Dimension from center of rear weld
Mark the spot where each measurement will be made.Note: If the inside of the bucket overlaps the rear portion of the base edge, the following measurements should be made on the bottom of the base edge. Otherwise, measure on top.
Determine dimension (E) from the base edge dimensions Table 1 or calculate dimension (E) by estimating the original edge width and multiplying by 0.6.
At each of the locations determined in Step 2, measure dimension (E) from the center of the rear weld. When measuring on the bottom of the edge, measure dimension (E) from the rear corner of the edge. Refer to Illustration 2.
Mark each of these points on the edge with chalk. If the edge is already worn beyond dimension (E) at any point, the edge is already worn out. The edge should be replaced as soon as possible to avoid breakage.
Using a caliper, measure the thickness of the edge at each marked point. The smallest of the measurement becomes dimension (D). Refer to Illustration 2.Procedure to Calculate Percent of Usable Wear Material That Has Worn Away
The following procedures describe how to use these measurements to estimate when that edge should be replaced.
Divide dimension (D) by the original thickness of that edge. Refer to the base edge dimensions Table 1 for the original thickness of Cat base edges. Competitive loaders probably have edges of similar thickness. Measure the edge in an area of little wear (next to an adapter, for example) if in doubt about the original thickness.
Illustration 3 g02855257
Wear Graph
(F) Percent of Useable Wear Material Worn Away
(G) Percent of Original Thickness Worn Away
(H) Severe
(J) Moderate
(K) Light
Determine Percent Worn.
Locate "Percent of Original Thickness Worn Away" (G) on the wear graph. Refer to Illustration