2006 Mack CV problems

What is wrong

On certain trucks equipped with a saf holland simplex fifth wheel, the lever arm pivot bolt may have been over tightened. An over tightened pivot bolt can distort the pivot bolt spacer sleeve, which may prevent the fifth wheel latch jaw from closing and latching securely around the trailer king pin.

Risk

There is a possibility that the pivot bolt can become loose without the driver's knowledge. When this occurs, the driver could drive away and the trailer could become disengaged, increasing the risk of a crash.

Remedy

Dealers will replace the pivot bolt and sleeve with a hex head shoulder bolt and washer free of charge. The recall began on january 28, 2008. Owners may contact mack trucks at 1‑800‑528‑6586.

Recall number 07V497000 · Recall details

What is wrong

On certain trucks equipped with bendix sr-7 spring brake modulating valves, the internal rubber check valve may leak causing a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button.

Risk

This could delay or failure in applying the parking brakes which could result in a vehicle roll away, increasing the risk of a crash.

Remedy

Mack is working with bendix to repair these vehicles (please see 07e037). Bendix will install a check valve repair kit for the affected sr-7 spring brake modulating valve free of charge. The recall began on january 10, 2008. Owners may contact bendix at 1‑440‑329‑9000 or mack at 1‑800‑528‑6586.

Recall number 07V360000 · Recall details

What is wrong

On certain trucks equipped with parker single check valves (scv) provided by bendix. The defect exists in the parker scv that connects with the supply port of the sr-7 spring brake modulating valve. After prolonged use of the parker scv, the valve body retainer may become excessively worn and eventually break apart. Pieces of the parker scv can become lodged inside the sr-7 spring brake modulating valve, potentially causing either leakage out of the sr-7 valve or preventing air from properly exhausting from the sr-7 valve.

Risk

This condition can cause a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button. These conditions can occur without warning, leading to unintended vehicle rollaway, brake drag, or in the case of loss of primary circuit, inability to modulate the spring brakes.

Remedy

Mack is working with bendix to replace the parker single check valve. The recall began on january 9, 2008. Owners may contact bendix at 1‑440‑329‑9000 or mack at 1‑800‑528‑6586.

Recall number 07V361000 · Recall details

What is wrong

Certain trucks equipped with a front glad hand option fail to comply with the performance criteria requirements of federal motor vehicle safety standard no. 121, 'air brake systems.'

Risk

The purpose of this standard is to insure safe braking performance under normal and emergency conditions.

Remedy

Dealers will replace the spring brake modulating valve free of charge. The recall began on october 16, 2006. Owners may contact mack truck at 1‑800‑528‑6586.

Recall number 06V319000 · Recall details

What is wrong

On certain trucks, the bolt that attaches the pitman arm to the steering gear may not be tightened properly.

Risk

This may affect the performance of the steering, which may result in a crash.

Remedy

Dealers will check the torque on the bolt that attaches the pitman arm to steering gear and tighten the bolt properly. The recall beagn august 18, 2005. Owners contact mack at 1-800-2528-6586.

Recall number 05V349000 · Recall details

Investigation has not identified a defect.complaints have abated.see closing report for further details.

EA09009

Odi is closing this preliminary evaluation and opening an engineering analysis (ea09-009) to further identify and evaluate the vehicle environment and brake system factors that may be causing or contributing to extended stopping distance perfromance in certain vehicles.

PE09010