MAGNETIC SHOE BRAKES
BRAKE WHEEL INSPECTION GUIDE
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Brake wheels should be inspected after every two months, 150 hours of operation, or 5,000 stops (whichever comes first), or as required by your specific application. The brake wheel, as well as the brake lining, should be replaced if any of the following conditions are observed:
- If more than 10% of the original rim thickness has been worn away due to normal service. Measurement of brake wheel diameters, for TM offset hub brake wheels, must not indicate less than the following dimensions:
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TM Frame
Size |
*Wheel
Diameter |
*Rim
Thickness |
Minimum Wheel
Diameter |
43 |
4.5 |
.25 |
4.45 |
63 |
6.0 |
.32 |
5.94 |
83 |
8.0 |
.38 |
7.92 |
1035 |
10.0 |
.38 |
9.92 |
1355 |
13.0 |
.38 |
12.92 |
1665 |
16.0 |
.62 |
15.88 |
1985 |
19.0 |
.62 |
18.88 |
2311 |
23.0 |
.62 |
22.88 |
3014 |
30.0 |
.75 |
29.85 |
* When in new condition.
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- If the brake wheel is scored more than 1/16" deep over more than 25% of the braking surface.
- If the brake wheel is scored in any area more than 1/8" deep on 16" or larger brake wheels, or more than 3/32" on 4" to 13" brake wheels.
- If the brake wheel is heat checked or blued over more than 50% of the brake surface. (This condition is caused by overheating; the cause of the overheating should be investigated and corrected.)
- If a crack is found on the rim, web, or hub, the brake wheel should be replaced immediately.
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