Idlers
Depth Gauge
Inches (mm) % Worn
0.62 (15.5) 0
0.64 (16.5) 12
0.66 (17.0) 24
0.68 (17.5) 36
0.70 (18.0) 48
0.72 (18.5) 60
0.74 (19.0) 68
0.76 (19.5) 76
0.78 (20.0) 84
0.80 (20.5) 92
0.82 (21.0) 100
0.84 (21.5) 108
0.86 (22.0) 116
0.88 (22.5) 124
Flange width: 2.11" (53.5 mm)
NOTE: On earlier, single web idlers the manufacturing process erroneously permitted
a crowned center flange. When measuring earlier, single web idlers with a crown,
subtract .10" (2.4 mm) from the actual wear measurement when determining percent
worn. Reference: IRM UC92-23.
Undercarriage Code:
101, 102, 1021, 119, 1191, 301, 302,
3021, 303, 3031, 305, 306, 3061
272
D3, 931, 933, 935, D4B, D4C — 6.125" (155.6 mm)
Low Sprocket Machines