Interpretation ID: aiam1861
Supervising Engineer
Oshkosh Truck Corporation
P.O. Box 2566
Oshkosh
WI 54901;
Dear Mr. Lanzdorf: This responds to your March 11, 1975, request for confirmation tha four Oshkosh snowplows qualify for exclusion from Standard No. 121, *Air brake systems*, under criteria set out in S3. You enclose photographs of the vehicles and state that they have all-wheel drive, a maximum attainable speed of 45 mph, and that three of the vehicles have no cargo- carrying capacity. The fourth vehicle has a dump body used for maintenance and construction purposes.; As you describe the vehicles, the first three meet the criteria an would be excluded from the standard. The fourth vehicle has a dump body which qualifies as 'cargo-carrying' and therefore the vehicle does not meet the criteria for exclusion.; Yours truly, Richard B. Dyson, Assistant Chief Counsel