2001 Mack CH problems

What is wrong

On certain chassis built with lng engines, the nexgen lng tank's primary and secondary relief valves could fail to open and relieve tank pressure.

Risk

This could cause ice buildup on the discharge side of the primary and secondary pressure system allowing the relief system to freeze and become blocked resulting in over pressurization of the lng tanks creating the risk of catastrophic tank rupture which could cause serious injury or death.

Remedy

Dealers will retrofit the lng tanks with a new primary relief valve pipe away tube and a new ventilated shroud. The recall began april 6, 2004. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1‑610‑709‑3337.

Recall number 04V159000 · Recall details

What is wrong

On certain heavytrucks equipped with truck hub units manufactured by skf exclusively for use on arvinmeritor's ff98x series non-drive steer axles, the hub unit bearings can wear prematurely.

Risk

Seizure of the bearings can cause wheel separation or wheel end fire.

Remedy

Dealers will replace all front axle hubs. Owner notification began on oactober 14, 2003. Customers will be informed of parts availability by october 3, 2003. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 610‑709‑3337.

Recall number 03V201000 · Recall details

What is wrong

On certain class 8 heavy duty trucks equipped with r. H. Sheppard m90 steering gears, an incorrect hose was used for the high-pressure line between the power steering pump and the steering gear. The hose is rated at 2000 psi, while it should be rated at 3000 psi.

Risk

This hose could develop a leak or burst while in service. Should the line burst, steering control would still be maintained, but a loss of power assist will be experienced.

Remedy

Dealers will replace the steering hose. Owner notification began march 22, 2002. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1‑610‑709‑3011.

Recall number 02V019000 · Recall details

What is wrong

Vehicle description: trucks equipped with e-tech engines. A condition exists on the auxiliary drive shaft of the e-tech engine that causes the loss of power steering on vehicles where the power steering pump is mounted off the front of the engine.

Risk

This could result in the loss of power steering.

Remedy

Dealers will inspect the vehicles and replace the nut that holds the gear to the auxiliary drive shaft. Owner notification began march 22, 2002. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1‑610‑709‑3011.

Recall number 01V389000 · Recall details

What is wrong

Vehicle description: heavy duty trucks equipped with certain meritor-wabco brake system two and four port relay valves. The valve may stick open when a high-pressure application is released.

Risk

When the valve sticks open, it can result in a total loss of air from either the service or the park brake system. The driver may lose braking ability under a service application, possibly resulting in a vehicle crash.

Remedy

Dealers will replace these valves. Owner notification began november 16, 2001. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1‑610‑709‑3011 or meritor wabco at 800‑535‑5560.

Recall number 01V189004 · Recall details

The companies involved in this matter are: skf (hub mfr), arvinmeritor (front axle mfr), and mack (manufacturer of class viiitractor/trucks).skf identified manufacturing defects for specific build dates on front axle hub and bearings (wheel bearings) supplied to arvinmeritor.as a result, arvinmeritor notified mack of axles supplied with possible defective front hub assemblies.as a result of that notification, 998 trucks are being recalled by mack for defective front axle wheel bearings which may fail in such a way that a wheel separation or wheel bearing fire occurs.see attached summary report for additional details.

PE02094