1984 Mack MH: recalls and complaints

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All updates to the register

• 88V1470006 Sep 1988Seat Belts
• 86V00800017 Jan 1986Structure
• 85V11300017 Sep 1985Service Brakes, Air
• 85V0570003 May 1985Steering / Linkages / Drag / Link / Connection
• 85V0510001 May 1985Structure / Body / Bumpers
• 84V1400007 Nov 1984Trailer Hitches / Fifth Wheel Assembly
• 84V1420007 Nov 1984Suspension / Front / Springs / Leaf Spring Assembly
• 84V1410007 Nov 1984Latches/Locks/Linkages / Doors / Latch
• 84V03300022 Mar 1984Steering / Steering Wheel/Handle Bar

1. 88V147000Received 6 Sep 1988. 11,000 units.

   Seat Belts

   Defect, in the NHTSA record

   Seat tether belts may not have been adjusted during assembly.

   Consequence, in the NHTSA record

   During an impact, driver and/or rider can move forwardand possibly strike the windshield, even when wearing a seat belt.

   Remedy, in the NHTSA record

   Adjust seat tether belt if necessary.

   Report filed by MACK TRUCKS, INCORPORATED.

2. 86V008000Received 17 Jan 1986. 7,000 units.

   Structure

   Defect, in the NHTSA record

   Left or right cab step may crack in its welded area due to flexing of the step during entering and exiting. Consequence of defect: as the cracks extend, the tubular step could partially collapse and break without warning to the user, and could result in personal injuries.

   Remedy, in the NHTSA record

   Install a reinforcement brace if no cracks are found. In addition, replace step if cracks are present.

   Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: 14 Aug 1986.

3. 85V113000Received 17 Sep 1985. 5,020 units.

   Service Brakes, Air

   Defect, in the NHTSA record

   The dual double check valve may not release the proper air volume to the brake system, causing a slight timing delay between the tractor and the trailer brake system. Consequences of defect: if the brakes are suddenly applied, the trailer could jackknife without warning to the operator, which could result in a vehicle crash.

   Remedy, in the NHTSA record

   Install two new sleeves in the dual double check valve which will increase air flow.

   Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: 7 Feb 1986.

4. 85V057000Received 3 May 1985. 52 units.

   Steering / Linkages / Drag / Link / Connection

   Defect, in the NHTSA record

   The drag links may have been installed incorrectly allowing drag link clamp bolt to axle beam interference. Consequence of defect: during a turning maneuver, increased steering effort or complete lockup of steering could occur without warning. This could result in loss of truck control and a crash.

   Remedy, in the NHTSA record

   Assure that drag links are installed to correct interference condition.

   Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: 9 Dec 1985.

5. 85V051000Received 1 May 1985. 7,500 units.

   Structure / Body / Bumpers

   Defect, in the NHTSA record

   The flip out step clevis on the bumper may fail and break under the weight of the person standing on the step to service the front area of the vehicle. Consequence of defect: this sudden break will cause the person standing on the step to fall, without warning, and could result in injuries.

   Remedy, in the NHTSA record

   Remove the step clevis and replace with a new improved clevis.

   Report filed by MACK TRUCKS, INCORPORATED.

6. 84V140000Received 7 Nov 1984. 64 units.

   Trailer Hitches / Fifth Wheel Assembly

   Defect, in the NHTSA record

   Due to improper and inadequate welding practices, the fifth wheel on the involved vehicles is defective. Frame mounted supports may have incomplete or poor quality welds. The welds could subsequently fail allowing separation of the tractor from the trailer.

   Remedy, in the NHTSA record

   The dealer will inspect and remove the fifth wheel and reweld the mounting angles at no charge to the owner.

   Report filed by MACK TRUCKS, INCORPORATED.

7. 84V142000Received 7 Nov 1984. 2,198 units.

   Suspension / Front / Springs / Leaf Spring Assembly

   Defect, in the NHTSA record

   The spring center bolt is not the proper size or length. As a result, location and alignment of the spring to the front axle may not be correct. If the front spring clips loosen, the inadequate center bolt may result in spring to axle misalignment, shifting of the axle, and loss of steering control.

   Remedy, in the NHTSA record

   The defect will be corrected by the addition of a spacer between the spring and the center bolt head to increase the effective head length. A longer center bolt will also be installed for positive retention.

   Report filed by MACK TRUCKS, INCORPORATED.

8. 84V141000Received 7 Nov 1984. 1,300 units.

   Latches/Locks/Linkages / Doors / Latch

   Defect, in the NHTSA record

   The door latches may be defective because a pawl spring was not manufactured to specifications. The pawl spring does not create proper tension on the pawl, (a part of the door latch mechanism). This constitutes a non-compliance with the requirements of federal motor vehicle safety standard no. 206, "door latches and door retention components".

   Remedy, in the NHTSA record

   The dealer will inspect and replace door latches, if necessary.

   Report filed by MACK TRUCKS, INCORPORATED.

9. 84V033000Received 22 Mar 1984. 4,393 units.

   Steering / Steering Wheel/Handle Bar

   Defect, in the NHTSA record

   Improper steering clamp bolts and torque applied during installation. The bolt could fail, allowing the steering yoke to become loose.

   Remedy, in the NHTSA record

   Inspection and, if necessary, installation of proper steering shaft clamp bolts tightened to specifications.

   Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: 5 Nov 1984.

The campaign number opens the NHTSA record. Each quotation is the text of the NHTSA recall file.

Recall campaign: One recall in the NHTSA recall file, with one campaign number. A campaign can name many makes, models and model years.

Units: The number of vehicles or products that a recall can include. The manufacturer or the firm reports the number to the agency.

The NHTSA complaint file has no complaint for this model year.

The NHTSA investigation file has no investigation that names this model year.

Investigation: A study of a possible safety defect by the NHTSA Office of Defects Investigation. An investigation with no closing date in the NHTSA file is open.

1. 19827
2. 19838
3. 19849
4. 19855
5. 19863
6. 19876
7. 19884
8. 19892
9. 19901
10. 19911
11. 19922
12. 19931

A year without a link has fewer than 2 campaigns and fewer than 25 complaints. It has no page.

• Mack MH: all model years
• Mack: 90 model lines

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• NHTSA VIN lookupNHTSA shows the unrepaired recalls of one vehicle from its VIN or its license plate.
• NHTSA: report a safety problemThe NHTSA form for a complaint about a vehicle, a tire, a child seat or equipment.
• NHTSA page of the 1984 Mack MHThe recalls, the complaints and the investigations that NHTSA shows for this model year.

How many units are in the recall campaigns for the 1984 Mack MH?

38,527 units in 9 campaigns. A campaign can name other models and model years, and its units include them.

How many recall campaigns does the Mack MH have for all model years?

NHTSA lists 19 recall campaigns for the Mack MH, model years 1982 to 1993. 9 of them name the 1984 model year.

Is an NHTSA investigation of the 1984 Mack MH open?

The NHTSA investigation file has no investigation that names this model year.