Interpretation ID: nht87-1.73

TYPE: INTERPRETATION-NHTSA

DATE: 04/29/87

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: John K. Liu

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. John K. Liu President, John K. Liu Enterprises, Inc. Box 544 Valley Forge, PA 19481

Dear Mr. Liu:

This responds to your letter concerning planned modifications to a used Class 8 truck/tractor. I regret the delay in this response. The answers to your questions are provided below.

It should be noted that the National Highway Traffic Safety Administration (NHTSA) does not provide approvals of motor vehicles or motor vehicle equipment. Under the National Traffic and Motor Vehicle Safety Act, it is the responsibility of the manufactu rer to ensure that it complies with all applicable requirements. The following represents our opinion based on the facts provided in your letter.

1. If we take a used Class 8 truck/tractor and modify it by adding an axle to increase the GVWR, do we have to make sure that the modified vehicle complies with the braking requirements of FMVSS 121/CFR 49:

By way of background information, new motor vehicles and items of motor vehicle equipment manufactured or imported for sale in the United States must comply with all applicable safety standards set forth in 49 CFR Part 571. One such standard is Safety St andard No. 121, Air Brake Systems, which applies to trucks, buses and trailers equipped with air brake systems. Vehicle manufacturers are required to certify that their new vehicles satisfy the requirements of all applicable safety standards. Also, if a vehicle is modified prior to first sale, the person who modifies the vehicle would be an alterer of a previously certified motor vehicle and would be required to certify that, as altered, the vehicle continues to comply with all of the safety standards a ffected by the alteration.

A person who modifies a used vehicle is not required to attach a certification label. However, manufacturers, distributors, dealers or motor vehicle repair businesses are prohibited by section 108(a)12)(A) of the Vehicle Safety Act from knowingly renderi ng inoperative any device or element of design installed on or in a motor vehicle or item of motor vehicle equipment in compliance with an applicable Federal motor vehicle safety standard. Thus, in adding an axle to a used truck/tractor to increase its G VWR, you must ensure that you do not knowingly render inoperative the compliance of the vehicle with Safety Standard No. 121. I have enclosed an interpretation letter of July 20, 1977, to the Truck Body and Equipment Association in which the agency discu sses in more detail how section 108(a)(2)(A) applies to the installation of additional axles in a used vehicle.

2. Do we have to revise the nameplate or install a new nameplate giving the new GVWR and axle ratings:

Under 49 CFR Part 567, Certification, manufacturers of motor vehicles are required to affix a certification label to their vehicles. The label is required to specify, among other things, the gross vehicle weight rating (GVWR) and the gross axle weight ra ting for each axle. See S 567.4(g). In addition, Safety Standard Ho. 120, Tire Selection and Rims for Motor Vehicles Other Than Passenger Cars, requires that specifications concerning tire and rim selection be placed on either the certification label or a separate tire information label. See S S5.3.2.

As indicated above, persons who alter certified vehicles prior to first sale are required to certify that their vehicles, as altered, conform to all applicable safety standards. Such alterers are required by Part 567 to leave the original certification l abel on the vehicle and add an additional label. See S 567.7. If the gross vehicle weight rating or any of the gross axle weight ratings of the vehicle as altered are different from those shown on the original certification label, the modified values mus t be specified. See 567.7(b).

Persons who modify used vehicles are not required to attach a certification label. However, in adding an axle to a used truck/tractor to increase its GVWR, you must ensure that you do not knowingly render inoperative the compliance of the vehicle with Sa fety Standard No. 120. We encourage you to supplement the original certification label and/or tire information label by an additional label to reflect changes in gross vehicle weight rating, axle ratings, and tire and rim specifications, to avoid confusi on on the part of vehicle users.

3. Do we have to adopt a new VIN (vehicle identification number)?

The answer to this question is no. Safety Standard No. 115 requires that manufacturers of new motor vehicles provide vehicle identification numbers. The vehicle identification number is not affected by the subsequent modification of the vehicle.

4. Do we have to tell a buyer that he is buying a modified vehicle:

NHTSA does not have any regulations requiring sellers of used vehicles to inform buyers about axle modifications.

Our answers to your questions cover the Federal regulations and laws administered by NHTSA. I have also enclosed a general information sheet which provides additional information concerning our regulations.

You should be aware that by adding an axle you are considered a manufacturer under the Vehicle Safety Act and subject to its provisions concerning safety-related defects. Under the Act, manufacturers must notify purchasers of safety-related defects and r emedy such defects without charge. Our engineering staff reviewed your plans and noted that in some instances the addition of an axle to a vehicle could constitute a safety-related defect, by making the vehicle unsafe for anticipated usage. You should ca refully analyze this issue for the vehicle in question. Among other things, you should consider whether, as modified, the overall vehicle structure, including the truck's frame, will be able to adequately accommodate the load distribution resulting from the additional axle and/or the higher GVWR, throughout the truck's anticipated length of service.

You may wish to contact the Federal Highway Administration's Office of Motor Carrier Standards concerning whether any of its regulations are relevant to your planned modifications. Also, with respect to Question 4, you may wish to contact the Federal Tra de Commission concerning whether it has any applicable regulations. Finally, a local attorney can advise you concerning the state law implications of your plans.

I hope this information is helpful.

Sincerely,

Erika Z. Jones Chief Counsel

Enclosures

Dec. 10,1986 NHTSA Rm 5219 400 7th St. SW Washington DC 20590

Att: Ms Erika Z. Jones, Chief Counsel

Dear Ms Jones,

Please render an opinion in the following matter:

1) If we take a used Class 8 truck/tractor and modify it by adding an axle to increase the GVWR, do we have to make sure that the modified vehicle complies with the braking requirements of FMVSS 121/CFR 49?

2) Do we have to revise the nameplate or install a new nameplate giving the new GVWR and axle ratings?

3) Do we have to adopt a new VIN(Vehicle identification number )?

4) Do we have to tell a buyer that he is buying a modified vehicle?

You may call us if you wish, since we would like your response as soon as feasible.

Thanking you in advance for your assistance. I remain

Sincerely yours,

John K. Liu. President JKL/sh