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PR450B, SF350, SF250B, TR225B
Pins and Bushings for Sealed Track
Internal Wear
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Inches (mm) % Worn 24.55 (623.5) 0 24.60 (625.0) 10 24.65 (626.0) 20 24.70 (627.5) 30 24.75 (628.5) 40 24.80 (630.0) 50 24.85 (631.0) 60 24.90 (632.5) 70 24.95 (633.5) 80 25.00 (635.0) 90 25.05 (636.5) 100 25.10 (637.5) 105 25.15 (639.0) 110 25.20 (640.0) 115 25.25 (641.5) 120
Track Bushings for Sealed Track
External Wear
Allowable Wear Caliper Lesser Greater Ultrasonic Inches (mm) % Worn % Worn Inches (mm) 1.97 (50.0) 0 0 0.40 (10.2) 1.96 (49.8) 8 6 0.39 (9.9) 1.95 (49.5) 16 12 0.38 (9.7) 1.94 (49.3) 24 18 0.37 (9.4) 1.93 (49.0) 32 24 0.36 (9.1) 1.92 (48.8) 40 30 0.35 (8.9) 1.91 (48.5) 48 36 0.34 (8.6) 1.90 (48.3) 56 42 0.33 (8.4) 1.89 (48.0) 64 48 0.32 (8.1) 1.88 (47.8) 72 54 0.31 (7.9) 1.87 (47.5) 76 60 0.30 (7.6) 1.86 (47.2) 80 64 0.29 (7.4) 1.85 (47.0) 84 67 0.28 (7.1) 1.84 (46.7) 88 70 0.27 (6.9) 1.83 (46.5) 92 73 0.26 (6.6) 1.82 (46.2) 96 76 0.25 (6.4) 1.81 (46.0) 100 79 0.24 (6.1) 1.80 (45.7) 104 82 0.23 (5.8) 1.79 (45.5) 108 85 0.22 (5.6) 1.78 (45.2) 112 88 0.21 (5.3) 1.77 (45.0) 116 91 0.20 (5.1) 1.76 (44.7) 120 94 0.19 (4.8) 1.75 (44.5) 97 0.18 (4.6) 1.74 (44.2) 100 0.17 (4.3) 1.73 (43.9) 103 0.16 (4.1) 1.72 (43.7) 106 0.15 (3.8) 1.71 (43.4) 109 0.14 (3.6) 1.70 (43.2) 112 0.13 (3.3) 1.69 (42.9) 115 0.12 (3.0) 1.68 (42.7) 118 0.11 (2.8) 1.67 (42.4) 121 0.10 (2.5)
Track Shoes
Triple Grouser
.39" (10 mm)
.82" (20.8 mm)
Depth Gauge Ultrasonic Inches (mm) % Worn Inches (mm) 0.60 (15.0) 0 1.00 (25.4) 0.55 (14.0) 15 0.95 (24.1) 0.50 (12.5) 30 0.90 (22.9) 0.45 (11.5) 44 0.85 (21.6) 0.40 (10.0) 58 0.80 (20.3) 0.35 (9.0) 72 0.75 (19.1) 0.30 (7.5) 86 0.70 (17.8) 0.25 (6.5) 100 0.65 (16.5) 0.20 (5.0) 114 0.60 (15.2) 0.15 (4.0) 128 0.55 (14.0)
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.
Track Rollers
Caliper Depth Gauge Ultrasonic
Inches (mm) % Worn Inches (mm) Inches (mm)
6.00 (152.5) 0 0.43 (11.0) 1.43 (36.3) 5.98 (152.0) 3 0.44 (11.0) 1.42 (36.1) 5.96 (151.5) 6 0.45 (11.5) 1.41 (35.8) 5.94 (151.0) 9 0.46 (11.5) 1.40 (35.6) 5.92 (150.5) 12 0.47 (12.0) 1.39 (35.3) 5.90 (150.0) 15 0.48 (12.0) 1.38 (35.1) 5.88 (149.5) 18 0.49 (12.5) 1.37 (34.8) 5.86 (149.0) 21 0.50 (12.5) 1.36 (34.5) 5.84 (148.5) 24 0.51 (13.0) 1.35 (34.3) 5.82 (148.0) 27 0.52 (13.0) 1.34 (34.0) 5.80 (147.5) 30 0.53 (13.5) 1.33 (33.8) 5.78 (147.0) 33 0.54 (13.5) 1.32 (33.5) 5.76 (146.5) 36 0.55 (14.0) 1.31 (33.3) 5.74 (146.0) 39 0.56 (14.0) 1.30 (33.0) 5.72 (145.5) 42 0.57 (14.5) 1.29 (32.8) 5.70 (145.0) 45 0.58 (14.5) 1.28 (32.5) 5.68 (144.5) 48 0.59 (15.0) 1.27 (32.3) 5.66 (144.0) 51 0.60 (15.0) 1.26 (32.0) 5.64 (143.5) 54 0.61 (15.5) 1.25 (31.8) 5.62 (142.5) 57 0.62 (15.5) 1.24 (31.5) 5.60 (142.0) 60 0.63 (16.0) 1.23 (31.2) 5.58 (141.5) 63 0.64 (16.5) 1.22 (31.0) 5.56 (141.0) 66 0.65 (16.5) 1.21 (30.7) 5.54 (140.5) 68 0.66 (17.0) 1.20 (30.5) 5.52 (140.0) 70 0.67 (17.0) 1.19 (30.2) 5.50 (139.5) 72 0.68 (17.5) 1.18 (30.0) 5.48 (139.0) 74 0.69 (17.5) 1.17 (29.7) 5.46 (138.5) 76 0.70 (18.0) 1.16 (29.5) 5.44 (138.0) 78 0.71 (18.0) 1.15 (29.2) 5.42 (137.5) 80 0.72 (18.5) 1.14 (29.0) 5.40 (137.0) 82 0.73 (18.5) 1.13 (28.7) 5.38 (136.5) 84 0.74 (19.0) 1.12 (28.4) 5.36 (136.0) 86 0.75 (19.0) 1.11 (28.2) 5.34 (135.5) 88 0.76 (19.5) 1.10 (27.9) 5.32 (135.0) 90 0.77 (19.5) 1.09 (27.7) 5.30 (134.5) 92 0.78 (20.0) 1.08 (27.4) 5.28 (134.0) 94 0.79 (20.0) 1.07 (27.2) 5.26 (133.5) 96 0.80 (20.5) 1.06 (26.9) 5.24 (133.0) 98 0.81 (20.5) 1.05 (26.7) 5.22 (132.5) 100 0.82 (21.0) 1.04 (26.4) 5.20 (132.0) 102 0.83 (21.0) 1.03 (26.2) 5.18 (131.5) 104 0.84 (21.5) 1.02 (25.9) 5.16 (131.0) 106 0.85 (21.5) 1.01 (25.7) 5.14 (130.5) 108 0.86 (22.0) 1.00 (25.4) 5.12 (130.0) 110 0.87 (22.0) 0.99 (25.1) 5.10 (129.5) 112 0.88 (22.5) 0.98 (24.9) 5.08 (129.0) 114 0.89 (22.5) 0.97 (24.6) 5.06 (128.5) 116 0.90 (23.0) 0.96 (24.4) 5.04 (128.0) 118 0.91 (23.0) 0.95 (24.1) 5.02 (127.5) 120 0.92 (23.5) 0.94 (23.9) Flange diameter is 6.88" (175 mm)
Challenger Drive Belt
Standard
Depth Gauge Inches (mm) % Worn
2.50 (63.5) 0 2.40 (61.5) 5 2.30 (58.5) 10 2.20 (56.0) 15 2.10 (53.5) 20 2.00 (51.0) 25 1.90 (48.5) 30 1.80 (45.5) 35 1.70 (43.0) 40 1.60 (40.5) 45 1.50 (38.0) 50 1.40 (35.5) 55 1.30 (33.0) 60 1.20 (30.5) 65 1.10 (28.0) 70 1.00 (25.5) 75 0.90 (23.0) 80 0.80 (20.5) 85 0.70 (18.0) 90 0.60 (15.0) 95 0.50 (12.5) 100 0.40 (10.0) 105 0.30 (7.5) 110 0.20 (5.0) 115 0.10 (2.5) 120
Challenger Drive Belt
Special Application
Depth Gauge Inches (mm) % Worn
1.50 (38.0) 0 1.40 (35.5) 9 1.30 (33.0) 18 1.20 (30.5) 27 1.10 (28.0) 36 1.00 (25.5) 44 0.90 (23.0) 52 0.80 (20.5) 60 0.70 (18.0) 68 0.60 (15.0) 76 0.50 (12.5) 84 0.40 (10.0) 92 0.30 (7.5) 100 0.20 (5.0) 108 0.10 (2.5) 116 0.00 (0.0) 124
Paver Drive Belt
Depth Gauge Inches (mm) % Worn
1.18 (30.0) 0 1.13 (28.5) 5 1.08 (27.5) 10 1.03 (26.0) 15 0.98 (25.0) 20 0.93 (23.5) 25 0.88 (22.5) 30 0.83 (21.0) 35 0.78 (20.0) 40 0.73 (18.5) 45 0.68 (17.5) 50 0.63 (16.0) 55 0.58 (14.5) 60 0.53 (13.5) 65 0.48 (12.0) 70 0.43 (11.0) 75 0.38 (9.5) 80 0.33 (8.5) 85 0.28 (7.0) 90 0.23 (6.0) 95 0.18 (4.5) 100 0.13 (3.5) 105 0.08 (2.0) 110 0.03 (1.0) 115 -0.02 (-0.5) 120
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