Hearth Record

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

Vehicle recall 75V-193. NHTSA received MACK TRUCKS, INCORPORATED’s report on Oct 31, 1975.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received MACK TRUCKS, INCORPORATED’s report on Oct 31, 1975. 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.

Source:

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

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

What should you do?

The notice gives no remedy in a field of its own.

Source:

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

  • How to reach the firm: MACK CAMPAIGN NO Q1012.TRUCKS SEPT.2, 1974 THRU JULY 30, 1975.POSSIBILITYTHAT AN ERROR WAS MADE IN THE INSTALLATION OF THE AIR SUPPLY PIPING TO THETRACTOR TRAILER PARK VALVE MANIFOLD.IF THIS OCCURS, THE PRIMARY AIR SUPPLYSYSTEM BECOMES THE SOLE SOURCE FOR SUPPLY AIR TO THE TRACTOR TRAILER PARK VALVEIN THIS CONDITION, TRACTOR OR TRAILER BRAKE OPERATION IS NOT AFFECTED, AS LONGAS THE PRIMARY SYSTEM HAS NORMAL OPERATING AIR PRESSURE.HOWEVER,IN THIS COULDBE HAZARDOUS TO EITHER THE PRIMARY SYSTEM, THERE WILL BE A CORRESPONDING LOSSOF AIR TO THE TRACTOR TRAILER PARK VALVE0 AND THIS VALVE, BY DESIGN, WILLAUTOMATICALLY APPLY THE EMERGENCY SPRING BRAKES, WHICH THEN COULD ONLY BERELEASED MECHANICALLY.AN AUTOMATIC APPLICATION OF THE EMERGENCY SPRING BRAKESWOULD IMMOBILIZE THE VEHICLE AND REQUIRE MECHANICAL RELEASE WHEEL BY WHEEL.THIS COULD BE HAZORDOUS TO EITHER THE VEHICLE OPERATOR OR TO THE INDIVIDUALRELEASING THE BRAKES.(CORRECT BY INSPECTING AND CHANGING PIPING TO PROPER AIRSUPPLY SYSTEM).
  • Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.

Which ones are recalled?

NHTSA counts 2,250 vehicles potentially involved, across everything this recall names.

Source:

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

  • Mack Fand 1974 and 1975, 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 8, 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.

1 of 4

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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