Idlers
Depth Gauge Ultrasonic Center Flange Wear
Inches (mm) % Worn Inches (mm) Inches (mm)
0.78 (20.0) 0 0.48 (12.2) 0.00 (0.0)
0.80 (20.5) 7 0.46 (11.7) 0.02 (0.5)
0.82 (21.0) 14 0.44 (11.2) 0.04 (1.0)
0.84 (21.5) 21 0.42 (10.7) 0.06 (1.5)
0.86 (22.0) 28 0.40 (10.2) 0.08 (2.0)
0.88 (22.5) 35 0.38 (9.7) 0.10 (2.5)
0.90 (23.0) 40 0.36 (9.1) 0.12 (3.0)
0.92 (23.5) 45 0.34 (8.6) 0.14 (3.5)
0.94 (24.0) 50 0.32 (8.1) 0.16 (4.0)
0.96 (24.5) 55 0.30 (7.6) 0.18 (4.5)
0.98 (25.0) 60 0.28 (7.1) 0.20 (5.0)
1.00 (25.5) 65 0.26 (6.6) 0.22 (5.5)
1.02 (26.0) 70 0.24 (6.1) 0.24 (6.0)
1.04 (26.5) 75 0.22 (5.6) 0.26 (6.5)
1.06 (27.0) 80 0.20 (5.1) 0.28 (7.0)
1.08 (27.5) 85 0.18 (4.6) 0.30 (7.5)
1.10 (28.0) 90 0.16 (4.1) 0.32 (8.0)
1.12 (28.5) 95 0.14 (3.6) 0.34 (8.5)
1.14 (29.0) 100 0.12 (3.0) 0.36 (9.0)
1.16 (29.5) 105 0.10 (2.5) 0.38 (9.5)
1.18 (30.0) 110 0.08 (2.0) 0.40 (10.0)
1.20 (30.5) 115 0.06 (1.5) 0.42 (10.5)
1.22 (31.0) 120 0.04 (1.0) 0.44 (11.0)
Undercarriage Code: 609, 6091
553
330 — 8.50" (215.9 mm)
Excavators
Flange width: 4.02" (102 mm) NOTE: Ultrasonic measurement is to determine flange
wear only. Use ultrasonic only on fabricated idlers.