AAR Technical Services

Technical Services Working

Arbitration & Rules

Asset Health Strategy

Brake Systems

Car Repair Billing

Coupling System & Truck Castings

Damage Prevention & Freight Claim

Equipment Engineering

Equipment Health Monitoring

Intermodal Car Performance

Intermodal Operations


Locomotive Repair Billing & Interchange Rules

Open Top Loading Rules

Quality Assurance Committee

Specially Equipped Freight Car

Wheels, Axles, Bearings & Lubrication

Wheels, Axles, Bearings & Lubrication Committee

The WABL Committee's mission is to establish, improve, and maintain wheel, axle, bearing and lubrication system interchange standards and rules, and to certify and monitor the performance of new equipment.

Daniel Carter

Manager –
Wheel, Axle, Bearing, and Lubrication Committee
Intermodal Car Performance Committee

Transportation Technology Center, Inc

55500 DOT Road Pueblo, CO 81001

Phone: 719-584-0670 | email: daniel_carter@aar.com




AAR Member Railroads




Associate Members

Greenbrier Rail Service
TTX (Chair)
GATX (Vice Chair)
Progress Rail




Field Manual

RULE 36 - Roller Bearings

RULE 37 - Adapters

RULE 41 - Wheels

RULE 43 - Axles

RULE 44 - Wheel Sets

Manual of Standards and Recommend Practice

Section G Wheels and Axles
Section G Part II Wheel and Axle (Shop) Manual
Section H Journal Bearings and Lubrication
Section H Part II Roller Bearing (Shop) Manual