Idlers
(Has no side plate indentations)
Depth Gauge Ultrasonic Center Flange Wear
Inches (mm) % Worn Inches (mm) Inches (mm)
0.86 (22.0) 0 0.42 (10.7) 0.00 (0.0)
0.88 (22.5) 9 0.40 (10.2) 0.02 (0.5)
0.90 (23.0) 18 0.38 (9.7) 0.04 (1.0)
0.92 (23.5) 27 0.36 (9.1) 0.06 (1.5)
0.94 (24.0) 36 0.34 (8.6) 0.08 (2.0)
0.96 (24.5) 45 0.32 (8.1) 0.10 (2.5)
0.98 (25.0) 54 0.30 (7.6) 0.12 (3.0)
1.00 (25.5) 63 0.28 (7.1) 0.14 (3.5)
1.02 (26.0) 72 0.26 (6.6) 0.16 (4.0)
1.04 (26.5) 80 0.24 (6.1) 0.18 (4.5)
1.06 (27.0) 82 0.22 (5.6) 0.20 (5.0)
1.08 (27.5) 84 0.20 (5.1) 0.22 (5.5)
1.10 (28.0) 86 0.18 (4.6) 0.24 (6.0)
1.12 (28.5) 88 0.16 (4.1) 0.26 (6.5)
1.14 (29.0) 90 0.14 (3.6) 0.28 (7.0)
1.16 (29.5) 92 0.12 (3.0) 0.30 (7.5)
1.18 (30.0) 94 0.10 (2.5) 0.32 (8.0)
1.20 (30.5) 96 0.08 (2.0) 0.34 (8.5)
1.22 (31.0) 98 0.06 (1.5) 0.36 (9.0)
1.24 (31.5) 100 0.04 (1.0) 0.38 (9.5)
1.26 (32.0) 102 0.02 (0.5) 0.40 (10.0)
1.28 (32.5) 104
NOTE: Ultrasonic measurement is to determine
1.30 (33.0) 106
flange wear only.
1.32 (33.5) 108
1.34 (34.0) 110
1.36 (34.5) 112
1.38 (35.0) 114
1.40 (35.5) 116
1.42 (36.0) 118
1.44 (36.5) 120
Flange width: 4.00" (101.6 mm)
Undercarriage Code: 161, 381
361
D7, 977, 571, 572 — 8.50" (215.9 mm)
Low Sprocket Machines