- The problem
- 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.
- The 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.
- The fix
- 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.
Vehicle safety record
2007 Mack CHN Problems, complaints & recalls
Owners have filed 1 complaint about the 2007 Mack CHN with NHTSA, most often about the engine & cooling (1). It is covered by 12 recalls, the latest in October 2007 for the fifth wheel assembly. For comparison, the 2006 has 0 and the 2008 has 0.
NHTSA data checked
DMore problems than a typical CHN year, for its age
#445 most complained-about 2007 vehicle
- Complaints
- 1
- Recalls
- 12
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Most common 2007 Mack CHN problems
Share of all 1 complaints. One complaint can name more than one area. Tap an area for its complaints and recalls.
2007 Mack CHN recalls 12
Recall repairs are free. Your dealer fixes them whether or not you bought the car there - check your VIN at nhtsa.gov/recalls to see if yours is done. What to do
- The problem
- On certain trucks equipped with aset ac model engines, the engine as configured with an external exhaust gas recirculation system makes servicing the fuel injection lines difficult when using traditional tools. Therefore, it is possible for fuel leaks to develop when removing and installing the fuel injection lines.
- The risk
- A leak in the fuel injection line may spray fuel on the hot surfaces of the exhaust gas recirculation system, which could result in an engine fire.
- The fix
- Dealers will replace the fuel injection lines free of charge. Note: this recall supersedes a previous campaign conducted in 2006 (please see 06v392). The recall began on september 11, 2007, with subsequent mailings every six weeks until april 2008. Owners may contact mack at 800-528-6586.
- The problem
- 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.
- The 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.
- The fix
- 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.
- The problem
- 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.
- The 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.
- The fix
- 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.
- The problem
- Certain trucks were recalled for the installation of sleeves on the fuel injection line as required by safety recall sc0317 (nhtsa recall no. 06V392). There is a possibility that the new sleeves may chafe the fuel injection line.
- The risk
- This could compromise the fuel injection line over time which could possibly result in an engine fire.
- The fix
- Dealers will remove the protective sleeves on all fuel injection lines free of charge. This recall began on april 19, 2007. Owners may contact mack trucks at 1-800-528-6586.
- The problem
- On certain trucks, the axle housings may have been manufactured with steel that was out of specification which could result in a fatigue failure over time.
- The risk
- If a fatigue failure occurs and is left unattended, the axle may lock up or the end of the axle could come off, which could result in a vehicle crash.
- The fix
- Dealers will inspect and replace the axles free of charge. The recall is expected to begin on or about april 9, 2007. Owners may contact mack trucks at 1-800-528-6586.
- The problem
- On certain trucks, the nut that retains the steering wheel may not have been installed.
- The risk
- If the retaining nut was not installed, the steering wheel may come off, which could result in a vehicle crash.
- The fix
- Dealers will remove the horn button to confirm that the retaining nut was installed. A retaining nut will be added if the nut is missing. The recall began on february 12, 2007. Owners may contact mack trucks at 800-866-1177.
- The problem
- On certain trucks, a leak in the aset ac fuel injection line may spray fuel on the exhaust gas recirculation pipes that carry hot exhaust gases .
- The risk
- THIS COULD POTENTIALLY RESULT IN AN ENGINE FIRE.
- The fix
- Mack has issued a stop work on this campaign under further notice (2-22-2007). The remedy does not adequately address the issue on all vehicles. Mack will re-release the recall in the near future. (Please see nhtsa no. 07V159/mack recall no. Sco323 for vehicles that have had this repair already performed.) This recall has been superseded (please see 07v401/sc0324).
- The problem
- On certain trucks, the brake cam tubes on the steer and drive axles may not have been greased.
- The risk
- The brake cam journals may corrode which may lead to the brakes dragging which could result in a vehicle fire.
- The fix
- Dealers will add grease to the brake cam tubes free of charge. The recall began on september 29, 2006. Owners may contact mack at 1-800-866-1177.
- The problem
- On certain trucks, the fuel line crossover bracket may prematurely fail and unexpectedly fall to the road. The location and size of the bracket draws a concern to the bracket being picked up and thrown by the drive axle wheels.
- The risk
- If the crossover bracket falls a crash may occur without prior notice.
- The fix
- Dealers will replace the brackets free of charge. The recall began on august 20, 2006. Owners may contact mack trucks at 1-800-528-6586.
- The problem
- On certain trucks equipped with a legris air manifold, the brass push-to-connect cartridge may unexpectedly separate from the plastic housing.
- The risk
- If the push-to-connect cartridge that supplies the air to the park brake chambers were to separate, then the brakes could unexpectedly apply increasing the risk of a crash.
- The fix
- Dealers will replace the air manifold free of charge. The recall began on september 27, 2006. Owners may contact mack trucks at 1-800-528-6586.
- The problem
- On certain trucks equipped with sr-7 bendix brake valves, the check valve inside the valve cavity may not properly set, causing internal air leakage. If the check valve does not properly seat, the resulting leakage can cause a delay in the application of the spring brakes to park the vehicle after operator pulls the dash valve button.
- The risk
- The delayed parking brake application can occur without warning, leading to unintended vehicle rollaway increasing the risk of a crash.
- The fix
- Dealers will inspect the valves and replace it free of charge. The recall began on august 14, 2006. Owners may contact mack trucks at 1-800-528-6586.
What owners say
Be the first CHN owner to share.
Problems or none - your experience is exactly what the next buyer is looking for. Write it now
1 complaints about the 2007 Mack CHN
Newest first, as filed with NHTSA by owners.
2007 Mack truck chn 613, 427 aset ac engine failure due to oil pump drive gear spinning loose on auxiliary shaft. When the vehicle began traveling down hill, the oil pump drive gear failed causing an immediate loss of oil pressure. The engine became a critical instrument in controlling the vehicle's down hill speed particularly the engine brake feature aka the "jake brake". The engine brake uses engine oil flow to operate. Since there was no more oil flow, the engine brake was rendered unusable. At this point,...
Read the full complaint
the choice was to continue down hill and rely solely on the vehicle brakes to control the vehicle speed, or continue to use the engine without the added braking power of the engine brake knowing that the engine would be destroyed. The driver chose to destroy the engine and not risk his life or the lives of others. The dealer refused to repair the vehicle under warranty because the eecm indicated the engine's maximum allowed speed was exceeded. Further investigation revealed the problem is inherent to all aset engines because the oil pump gear helix was changed for the new design engine. The auxiliary shaft direction of rotation was reversed and the direction of thrust on the drive gear forces the drive gear away from the rear bearing journal which it is nested against. Older engine design had the direction of thrust toward the bearing journal which held the gear in place. Any condition, (like an engine overspeed) that would increase oil pressure could dislodge the gear. According to the dealer, an engine overspeed condition can only occur while going down hill and using the engine to control vehicle speed. If the hill would have been higher, the engine may not have been able to continue to slow the vehicle and a crash would most likely have occurred. This happened in southeast louisiana where high hills are non existent. Had this happened in a mountainous area, it could have been disastrous. Mack trucks refuses to discuss this any further. *Tr
Mack CHN: every year compared
All CHN yearsQuestions about the 2007 Mack CHN
Does the 2007 Mack CHN have any recalls?
Yes - NHTSA lists 12 recalls for the 2007 Mack CHN: fifth wheel assembly (October 2007); fuel system, diesel (September 2007); check valve (August 2007); parking brake (August 2007) and more. Recall repairs are free at any authorized dealer. Enter your VIN at nhtsa.gov/recalls to see whether yours has been fixed.
What are the most common problems with the 2007 Mack CHN?
By the complaints owners filed with NHTSA, the most common problem areas are the engine & cooling (1).
How many complaints has the 2007 Mack CHN had?
1 complaints have been filed with NHTSA, the first on February 14, 2011 and the latest on February 14, 2011. Of these, 0 describe a crash and 0 a fire, and together they report 0 injuries and 0 deaths.
Is the 2007 Mack CHN a reliable vehicle?
Its Safety Index is 30 out of 100 (grade D: more problems than a typical Mack CHN year, for its age). The index weighs complaints, crashes, fires, injuries, deaths and recalls against how long the vehicle has been on the road, compared with the same model's other years. It is not a measure of every repair - read the complaints and owner experiences, and have any used vehicle inspected before you buy.
What should I do if my 2007 Mack CHN has a problem?
If it is a safety problem, stop driving it if it is unsafe and contact your dealer. Report it to NHTSA at nhtsa.gov/report-a-safety-problem - enough reports start investigations and recalls - and share your experience here so other owners know what to look for.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data