Idlers
Depth Gauge Ultrasonic Center Flange Wear
Inches (mm) % Worn Inches (mm) Inches (mm)
0.78 (20.0) 0 0.49 (12.4) 0.00 (0.0)
0.80 (20.5) 6 0.47 (11.9) 0.02 (0.5)
0.82 (21.0) 12 0.45 (11.4) 0.04 (1.0)
0.84 (21.5) 18 0.43 (10.9) 0.06 (1.5)
0.86 (22.0) 24 0.41 (10.4) 0.08 (2.0)
0.88 (22.5) 30 0.39 (9.9) 0.10 (2.5)
0.90 (23.0) 36 0.37 (9.4) 0.12 (3.0)
0.92 (23.5) 42 0.35 (8.9) 0.14 (3.5)
0.94 (24.0) 48 0.33 (8.4) 0.16 (4.0)
0.96 (24.5) 54 0.31 (7.9) 0.18 (4.5)
0.98 (25.0) 60 0.29 (7.4) 0.20 (5.0)
1.00 (25.5) 66 0.27 (6.9) 0.22 (5.5)
1.02 (26.0) 72 0.25 (6.3) 0.24 (6.0)
1.04 (26.5) 76 0.23 (5.8) 0.26 (6.5)
1.06 (27.0) 78 0.21 (5.3) 0.28 (7.0)
1.08 (27.5) 80 0.19 (4.8) 0.30 (7.5)
1.10 (28.0) 82 0.17 (4.3) 0.32 (8.0)
1.12 (28.5) 84 0.15 (3.8) 0.34 (8.5)
1.14 (29.0) 86 0.13 (3.3) 0.36 (9.0)
1.16 (29.5) 88 0.11 (2.8) 0.38 (9.5)
1.18 (30.0) 90 0.09 (2.3) 0.40 (10.0)
1.20 (30.5) 92 0.07 (1.8) 0.42 (10.5)
1.22 (31.0) 94 0.05 (1.3) 0.44 (11.0)
1.24 (31.5) 96 0.03 (0.8) 0.46 (11.5)
1.26 (32.0) 98 0.01 (0.3) 0.48 (12.0)
1.28 (32.5) 100
NOTE: Ultrasonic measurement is to determine
1.30 (33.0) 102
flange wear only.
1.32 (33.5) 104
1.34 (34.0) 106
1.36 (34.5) 108
1.38 (35.0) 110
1.40 (35.5) 112
1.42 (36.0) 114
1.44 (36.5) 116
1.46 (37.0) 118
1.48 (37.5) 120
Flange width: 4.02" (102 mm)
Undercarriage Code: 1655
415
D7 — 8.50" (215.9 mm)
Cat Classic Undercarriage