Vehicle recall 78V146000 · June 21, 1978

1977-1978 Freightliner Freightliner

The check valve, located on the inlet side of the primary and secondary air tanks may crack in the female fitting area and cause a slow loss of air.

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

Summary: The check valve, located on the inlet side of the primary and secondary air tanks may crack in the female fitting area and cause a slow loss of air. A leaking valve will reduce air pressure and partial or complete loss of brakes on those axles that depend upon that part of the system could occur.
Remedy: The dealer will inspect and, if necessary, install new air check valves.
Notes: Vehicle description: heavy trucks.system: service brakes; air check valve.consequences of defect: partial or complete loss of braking capability couldresult in loss of vehicle control and an accident. Under some conditions, theemergency brakes may automatically activate, possibly allowing the driversufficient time to select a safe place to pull off the highway.note: each check valve should immediately be inspected for a leak. If one isfound, the dealer should be contacted immediately.

Recall details

NHTSA campaign: 78V146000
Reported to NHTSA: June 21, 1978
Filed by: FREIGHTLINER CORP.
Owner notification: September 11, 1978
Vehicles potentially affected: 65
Initiated by: the manufacturer
Components: Service brakes, air › Supply › Check valve

Recall 78V146000 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.

Freightliner Freightliner (1977-1978): 1978, 1977

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