Hearth Record

Service brakes, air: supply: hoses, lines/piping, and fittings (Mack)

Vehicle recall 78V-030. NHTSA received MACK TRUCKS, INCORPORATED’s report on Feb 9, 1978.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received MACK TRUCKS, INCORPORATED’s report on Feb 9, 1978. Copied from NHTSA on Oct 26, 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.

A DESIGN DEFICIENCY EXISTS IN THE AIR DRYER PIPING IN THE AREA OF THE PRESSURE RELIEF VALVE AND COMPRESSOR GOVERNOR CONTROL LINK.

MOISTURE IS PASSED AND BUILDS UP IN THIS RELIEF VALVE AND CONTROL LINE.

IN FREEZING AMBIENT TEMPERATURES, THIS MOISTURE MAY FREEZE, ALLOWING THE CHASSIS AIR SYSTEM PRESSURE TO EXCEED 150 PSI.

EXCESSIVE AIR SYSTEM PRESSURE CAN CAUSE SEPARATION OF AIR PIPING CONNECTIONS AND AIR SYSTEM VALVE FAILURE.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 26, 2026. Updated daily.

  • NHTSA’s part: Service brakes, air: supply: hoses, lines/piping, and fittings.

What should you do?

THE DEALER WILL RELOCATE THE AIR SYSTEM COMPRESSOR GOVERNOR LINE AND PRESSURE RELIEF VALVE TO ELIMINATE MOISTURE ACCUMULATION.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 26, 2026. Updated daily.

  • How to reach the firm: VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH ANCHORLOK AIR DRYERS.SYSTEM: SERVICE BRAKES; AIR SYSTEM AND GOVERNOR CONTROL LINE (AIR DRYER).CONSEQUENCES OF DEFECT: WHEN THIS OCCURS, AUTOMATIC APPLICATION OF THE CHASSISEMERGENCY SPRING BRAKES AND TRAILER BRAKES COULD CAUSE LOSS OF VEHICLE CONTROLWITHOUT PRIOR WARNING AND A VEHICLE ACCIDENT.NOTE: OWNER/DRIVER IS ADVISED NOT TO OPERATE VEHICLE IF AIR PRESSURE EXCEEDS15O PSI.
  • Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.

Which ones are recalled?

NHTSA counts 400 vehicles potentially involved, across everything this recall names.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 26, 2026. Updated daily.

  • Mack WLand 1975, 1976, 1977 and 1978, before the model years listed here
  • Mack RLand 1975, 1976, 1977 and 1978, before the model years listed here
  • Mack WSand 1975, 1976, 1977 and 1978, before the model years listed here
  • Mack RSand 1975, 1976, 1977 and 1978, before the model years listed here

Who is recalling it?

  • Made by MACK TRUCKS, INCORPORATED.
Source:

NHTSA, Recalls flat file before 2010. Released Oct 26, 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.
Source:

Hearth Record wrote these lines.

Sources

Source:

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 26, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 28, 2026. Updated monthly.

From the homeNone yet. Replies and paid listings aren’t open, and when they open they will sit here, below the record.

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Every fact names its source.

Who published it, when, and how often it changes sit beside each fact, with a link to the agency’s own file.

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