Interpretation ID: nht89-1.19

TYPE: INTERPRETATION-NHTSA

DATE: 02/10/89

FROM: ROLF DUERR -- NOITH TRANSMISSIONS PROJECT ENGINEER

TO: U.S. DEPARTMENT OF TRANSPORTATION OFFICE OF CHIEF COUNCIL

TITLE: DOT APPROVAL OF SWAGELOK FITTING

ATTACHMT: LETTER DATED 08/23/89 FROM STEPHEN P. WOOD -- NHTSA TO ROLF DUERR -- VOITH TRANSMISSIONS; REDBOOK A34[2]; FMVSS 106

TEXT: To Whom It May Concern:

Enclosed, please find the fitting used on our product, the Voith VHBK-120 Driveline Brake Retarder. We are a European manufacturer of brake retarders and wish to make our product more adaptable to the American market. We are doing this by converting ou r metric air fittings to DOT approved fittings. Most of the air fittings we required were offered by Parker. The enclosed swagelok fitting will replace the enclosed DIN metric fitting as a positionable 90 degrees elbow.

Swagelok, as you may know, has no DOT designation standard on the fitting. Thus your approval is theoretically needed if it is attached to the air braking system of a truck. In our case, the air supply line to the retarder is tapped off of the auxiliar y air brake tank/system. Attached you will find technical specs on this swagelok fitting which we would like to use. I have also enclosed some literature on our product. Your prompt response will be greatly appreciated.

Regards,