Idlers
Depth Gauge Ultrasonic Center Flange Wear
Inches (mm) % Worn Inches (mm) Inches (mm)
0.94 (24.0) 0 0.48 (12.2) 0.00 (0.0)
0.96 (24.5) 9 0.46 (11.7) 0.02 (0.5)
0.98 (25.0) 18 0.44 (11.2) 0.04 (1.0)
1.00 (25.5) 27 0.42 (10.7) 0.06 (1.5)
1.02 (26.0) 36 0.40 (10.2) 0.08 (2.0)
1.04 (26.5) 45 0.38 (9.7) 0.10 (2.5)
1.06 (27.0) 54 0.36 (9.1) 0.12 (3.0)
1.08 (27.5) 63 0.34 (8.6) 0.14 (3.5)
1.10 (28.0) 72 0.32 (8.1) 0.16 (4.0)
1.12 (28.5) 80 0.30 (7.6) 0.18 (4.5)
1.14 (29.0) 82 0.28 (7.1) 0.20 (5.0)
1.16 (29.5) 84 0.26 (6.6) 0.22 (5.5)
1.18 (30.0) 86 0.24 (6.1) 0.24 (6.0)
1.20 (30.5) 88 0.22 (5.6) 0.26 (6.5)
1.22 (31.0) 90 0.20 (5.1) 0.28 (7.0)
1.24 (31.5) 92 0.18 (4.6) 0.30 (7.5)
1.26 (32.0) 94 0.16 (4.1) 0.32 (8.0)
1.28 (32.5) 96 0.14 (3.6) 0.34 (8.5)
1.30 (33.0) 98 0.12 (3.0) 0.36 (9.0)
1.32 (33.5) 100 0.10 (2.5) 0.38 (9.5)
1.34 (34.0) 102 0.08 (2.0) 0.40 (10.0)
1.36 (34.5) 104 0.06 (1.5) 0.42 (10.5)
1.38 (35.0) 106 0.04 (1.0) 0.44 (11.0)
1.40 (35.5) 108 0.02 (0.5) 0.46 (11.5)
1.42 (36.0) 110
NOTE: Ultrasonic measurement is to determine
1.44 (36.5) 112
flange wear only.
1.46 (37.0) 114
1.48 (37.5) 116
1.50 (38.0) 118
1.52 (38.5) 120
Flange width: 4.75" (120.7 mm)
Undercarriage Code: 175, 390
374
D8, 983 — 9.00" (228.6 mm)
Low Sprocket Machines