AI DamageCaterpillar CT660: problems, complaints, bulletins
Summary for the Caterpillar CT660 across 2 model years: 0 owner complaints and 34 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 0 | 0 | 30 |
| Electrical system | 0 | 0 | 10 |
| Engine and cooling | 0 | 0 | 8 |
| Equipment | 0 | 0 | 4 |
| Powertrain | 0 | 0 | 4 |
| Structure | 0 | 0 | 4 |
| Fuel system | 0 | 0 | 2 |
| Suspension | 0 | 0 | 2 |
| Visibility | 0 | 0 | 2 |
| Wheels | 0 | 0 | 2 |
What to check before buying
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- There is a problem with certain truck models that were built with 2013 through 2015 model year CT13 heavy…
- Sheppard Gearbox and Power Steering Pump Specifications Are Now Available - Specification charts are now…
- Body and Chassis Paint Guidelines - This general field guideline applies to all CT660 Vocational Trucks…
- CT11 and CT13 Valve Cover Bolts - The valve covers on the CT11 and CT13 engines contain bolts that have…
- Rear Axle Alignment Specifications - The following tables display rear axle alignment specifications and…
- CT11, CT13, and CT15 Cooling System Flush After Oil Cooler - In the event of an oil cooler failure, engine…
- SART Module Diagnostic Procedure for Certain On Highway Trucks - The technician may notice that a code…
- CT660 Instrument Gauge Cluster - Gauges, including speedometer, tachometer, transmission oil temperature,…
- CT660 Vision Link "Ghost Codes" Instrument Cluster Generated Codes - Ghost codes show up on Vision Link,…
- A/C Refrigerant Quantity Is Incorrect for CT660 On Highway Trucks - In table 14 in chapter 6 of System…
- There is a problem which relates to engine emissions on certain CT660, CT680, and CT681 On Highway Trucks…
- EXCESSIVE ENGINE OIL CONSUMPTION ON CT13 ENGINES WITH SCR - ON CERTAIN CT13 ENGINES WITH SCR, CARBON CAN…
Other models of this make
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Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.