Hearth Record

Engine and engine cooling: engine (Mack)

Vehicle recall 78V-170. NHTSA received MACK TRUCKS, INCORPORATED’s report on Aug 8, 1978.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received MACK TRUCKS, INCORPORATED’s report on Aug 8, 1978. Copied from NHTSA on Oct 28, 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 POSSIBILITY EXISTS THAT THE ALUMINUM ENGINE REAR SUPPORT BRACKETS MAY FAIL DUE TO METAL FATIGUE.

THIS TYPE OF FAILURE WOULD ALLOW THE ENGINE AND TRANSMISSION ASSEMBLY TO DISLOCATE DOWNWARD.

THIS WILL RESULT IN THROTTLE CONTROL LOSS WITH THE ENGINE OPERATING CONTINUOUSLY IN THE MID TO UPPER RANGE OF THE GOVERNED SPEED RANGE.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 28, 2026. Updated daily.

  • NHTSA’s part: Engine and engine cooling: engine.

What should you do?

DEALER WILL INSPECT AND, IF NECESSARY, REPLACE ALUMINUM SUPPORT BRACKETS WITH BRACKETS MADE FROM DUCTILE IRON FOR INCREASED STRENGTH.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 28, 2026. Updated daily.

  • How to reach the firm: VEHICLE DESCRIPTION: TRUCKS.SYSTEM: ENGINE; ENGINE MOUNTING BRACKET.CONSEQUENCES OF DEFECT: LOSS OF THROTTLE CONTROL MAY RESULT IN LOSS OF VEHICLECONTROL AND AN ACCIDENT.
  • Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.

Which ones are recalled?

NHTSA counts 850 vehicles potentially involved, across everything this recall names.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 28, 2026. Updated daily.

  • Mack RWLand 1975, 1976, 1977 and 1978, before the model years listed here
  • Mack WLand 1975, 1976, 1977 and 1978, before the model years listed here
  • Mack RWSand 1975, 1976, 1977 and 1978, before the model years listed here
  • Mack WSand 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 28, 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 28, 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.

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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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