Common Truck/Trailer Life Expectancies

Common issues to look out for in your heavy-duty truck or trailer.

Truck:

• Engine
  • Should last life of the vehicle-1 million + miles.
  • Poor maintenance will significantly shorten life
• Aftertreatment system
  • Clean DPF 100,000-~500,000 mile life, poss. More
  • Sensors can fail anytime-usually after 250k
  • DOC-Should last life of engine w/ proper maint.
  • SCR system-Life of engine w/ proper maint, pump/injector-life varies
• Transmission
  • 1 million+ w/ maint. (seals, input shaft)
  • Ujoints- 250k-350k life
  • Clutch~ 500k, heavily duty cycle/driver dependent
• Drive Axles(Differential)
  • 1 million+ w/ maint
  • Bearings- ~500k
• Cooling system
  • Water pump-~500k
  • Hoses-~300k
  • Radiator-~500k+
  • Coolant-Flush every 2 years
  • Fan clutch-250k+

• EGR system
  • Constant maint. and calibration
  • EGR cooler-Clean every 200k, 500-750k life
  • EGR valve-~500k-Life
• Turbocharger
  • Life of engine w/ proper maint.
• Electrical system
  • Will experience some major repair over life of vehicle-Life cycle varies CONSIDERABLY
  • Alternator-~350k
• Steering/suspension
  • Replace once during life
  • Kingpins-~350-500k
• Brakes
  • ~50-100k-Heavily driver/duty cycle dependent
  • S-cams-~500k w/ proper maint.
  • Air Cans-~250k+
• Tires
  • Varies wildly-Should see 100k
• APU
  • 10+ years

Trailer:

• Roof
  • ~6 years, then requires constant repair or replacement
• Floors
  • 1 million miles
• Bearings
  • 350k-500k+

• Wheel Seals
  • ~3+ years
• Brakes
  • See above
• Electrical
  • Varies on route