Vehicle recall 79V253000 · November 15, 1979

1973-1978 Hendrickson Hendrickson

The low air pressure switches used on some of the involved vehicles have a manufacturing tolerance that issues a warning only when the pressure drops a few pounds per square inch…

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

Summary: The low air pressure switches used on some of the involved vehicles have a manufacturing tolerance that issues a warning only when the pressure drops a few pounds per square inch below 60 PSI. As a result, they do not comply with federal motor vehicle safety standard no. 121, "air brake systems".
Remedy: If the owner, upon receipt of a post card, indicates a compliance, the dealer will reimburse owner $5.00 for cost of test. If owner indicates a non-compliance, the dealer will send two replacement switches and a check for $5.00 to cover both the system test and switch replacement.
Notes: Vehicle description: trucks, drill rigs, crane carriers, and school buses.system: service brakes; air pressure warning switches.consequences of defect: if the low air pressure warning switch is not activatedat precisely 60 PSI, the driver would not be forewarned of potential loss ofbraking action. This could contribute to a vehicle accident.

Recall details

NHTSA campaign: 79V253000
Reported to NHTSA: November 15, 1979
Filed by: HENDRICKSON MFG. CO.
Owner notification: January 2, 1980
Vehicles potentially affected: 1,246
Initiated by: NHTSA’s Office of Vehicle Safety Compliance
Components: Service brakes, air › Supply › Low pressure warning › Switch

Recall 79V253000 on nhtsa.gov, with the manufacturer’s documents

Vehicles covered

As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.

Hendrickson Hendrickson (1973-1978): 1978, 1977, 1976, 1975, 1974, 1973

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