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AAR Circular Letter C-8525 |
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AAR Circular Letter C-8525 |
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April 10, 1996
CIRCULAR LETTER
(c-8525)
Subject: Implementation of Modification of Section G II, Figure 4.43
TO MEMBERS AND PRIVATE CAR OWNERS
File Number: TWBL – 28.3
In Circular Letter c-8418, dated October 20, 1995, comments were solicited concerning a proposed modification of Section G II, Figure 4.43. Comments received were addressed and the attached modification was approved. The effective date is May 10, 1996 to allow shops time to modify their procedures to implement the modifications.
These provisions were added to maintain the upper half of the torque range for all applications cap screws. This is your authority to update Section G II to include the attached modifications.
Sincerely,
Thomas J. Stahura
Director, Equipment Performance
Association of American Railroads
Wheel and Axle Manual
FREIGHT CARS
| Class (Journal Size) | Cap Screw Size | Torque Ft. Lbs. |
| B (4 ¼ X 8) | ¾" X 10 | 115 |
| C (5 X 9) | 7/8" X 9 | 145 |
| D (5 ½ X 10) | 7/8" X 9 | 145 |
| E ( 6 X 11) | 1" X 8 | 265 |
| F (6 ½ X 12) | 1 1/8" X 7 | 385 |
| G (7 X 12) | 1 ¼" X 7 | 450 |
AMTRAK CARS
| G (6 ½" Diameter) | 7/8" X 9 High Strength | 315 |
| 7/8" X 9 | 145 | |
| EE (6" Diameter) | 7/8" X 9 | 145 |
| EE (5 ½" Diameter) | ¾" X 10 | 115 |
Cap Screw Torque in Foot Pounds To Bo Posted in Work Area In Roller Bearing Mounting Shops
Torque wrenches must be accurate within +/- four percent.