Vehicle speed control: springs (Kenworth)
Vehicle recall 79V-029. NHTSA received PACCAR, INCORPORATED’s report on Nov 27, 1978.
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The short answer
NHTSA received PACCAR, INCORPORATED’s report on Nov 27, 1978. Copied from NHTSA on Oct 20, 2026.
Every line below is in NHTSA’s own words, with its source beside it.
What’s wrong with it?
The notice gives no hazard in a field of its own.
THE INVOLVED VEHICLES DO NOT CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 124, “ACCELERATOR CONTROL SYSTEMS”, IN THAT DUE TO THE LOCATION OF THE LOWER THROTTLE RETURN SPRING AND THE TENSION IN BOTH THROTTLE SPRINGS, THE VEHICLE MAY NOT MEET THE RETURN TIME SPECIFIED IN THE STANDARD.
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
- NHTSA’s part: Vehicle speed control: springs.
What should you do?
DEALER WILL INSPECT AND, IF NECESSARY, EITHER RELOCATE OR REPLACE THE THROTTLE SPRINGS AT NO COST TO OWNER.
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
- How to reach the firm: VEHICLE DESCRIPTION: TRUCKS.SYSTEM: THROTTLE LINKAGE AND CONTROL; RETURN SPRING.CONSEQUENCES OF DEFECT: UNDER EMERGENCY CONDITIONS, THE FAILURE OF THE THROTTLETO RETURN TO IDLE WITHIN THE SPECIFIED TWO SECONDS COULD RESULT IN LOSS OFVEHICLE CONTROL WHICH COULD CAUSE A VEHICLE ACCIDENT.
- Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.
Which ones are recalled?
NHTSA counts 30,000 vehicles potentially involved, across everything this recall names.
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
- Kenworth 700and 1973, 1974, 1975, 1976, 1977 and 1978, before the model years listed here
- Kenworth L700and 1973, 1974, 1975, 1976, 1977 and 1978, before the model years listed here
Who is recalling it?
- Made by PACCAR, INCORPORATED.
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
What the record doesn’t say
- NHTSA’s recall file doesn’t say whether anyone was hurt.
- Whether one vehicle or seat has been fixed: only its maker, or NHTSA’s lookup with a VIN, can say.
- This recall names only model years before 2015, which have no pages here. Your VIN, at NHTSA, says which recalls are open on a vehicle.
- How many have been returned or fixed isn’t in the notice.
Hearth Record wrote these lines.
Sources
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National Highway Traffic Safety Administration, Recalls flat file before 2010 (FLAT_RCL_PRE_2010).
Released Oct 20, 2026 and checked Oct 20, 2026. Updated daily. Public domain (U.S. Government work).
Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 20, 2026.