Bushings for Sealed Track
External Wear
Sealed Track
Allowable Wear
Caliper Lesser Greater Ultrasonic
Inches (mm) % Worn % Worn Inches (mm)
2.33 (59.2) 0 0 0.42 (10.7)
2.32 (58.9) 10 6 0.41 (10.4)
2.31 (58.7) 20 12 0.40 (10.2)
2.30 (58.4) 30 18 0.39 (9.9)
2.29 (58.2) 40 24 0.38 (9.7)
2.28 (57.9) 50 30 0.37 (9.4)
2.27 (57.7) 60 36 0.36 (9.1)
2.26 (57.4) 70 42 0.35 (8.9)
2.25 (57.2) 75 48 0.34 (8.6)
2.24 (56.9) 80 54 0.33 (8.4)
2.23 (56.6) 85 60 0.32 (8.1)
2.22 (56.4) 90 66 0.31 (7.9)
2.21 (56.1) 95 72 0.30 (7.6)
2.20 (55.9) 100 78 0.29 (7.4)
2.19 (55.6) 105 82 0.28 (7.1)
2.18 (55.4) 110 85 0.27 (6.9)
2.17 (55.1) 115 88 0.26 (6.6)
2.16 (54.9) 120 91 0.25 (6.4)
2.15 (54.6) 94 0.24 (6.1)
2.14 (54.4) 97 0.23 (5.8)
2.13 (54.1) 100 0.22 (5.6)
2.12 (53.8) 103 0.21 (5.3)
2.11 (53.6) 106 0.20 (5.1)
2.10 (53.3) 109 0.19 (4.8)
2.09 (53.1) 112 0.18 (4.6)
2.08 (52.8) 115 0.17 (4.3)
2.07 (52.6) 118 0.16 (4.1)
2.06 (52.3) 121 0.15 (3.8)
Undercarriage Code: 546, 547, 566, 578
521
315, 317, 318, 320, 322 — 7.50" (190 mm)
Excavators