AAR Interchange Rule 21

Group M – High Capacity 2-3/4 Inch Travel

Models in blue are acceptable for reconditioning/purchase.
Removed What Can Be Applied Remarks
Group M Group M
Group J
Substitution of Group J for Group M can be done only with car owner’s permission, except when car was built after January 1, 1965 or is equipped with Type F coupler.

Qualifier Group M Name and Type AAR Spec Gear Length (inches) Pocket Length (inches)
01*Dresser Ind. Waugh Type 730EM901E24 5/824 5/8
02Miner RF 361M901E24 5/824 5/8
03*Miner CF-7-24M901E24 5/824 5/8
04Cardwell Westinghouse Mark MM901E24 5/824 5/8
05Cardwell Westinghouse Mark LM901E22 3/824 5/8
06Cardwell Westinghouse Mark L-RM901E22 3/824 5/8
07VacantM901E22 3/824 5/8

* No longer in production.

Miner and its referenced products are federally registered trade marks of Miner Enterprises, Inc.
Cardwell Westinghouse and its referenced products are federally registered trade marks of Wabtec Corporation.
Keystone and its referenced product are federally registered trade mark of ASF-Keystone, Inc.
© 2007 A. Stucki Company. All Rights Reserved.