Cummins 855 is an engine known for its durability and efficiency. But it has some common problems.
1. Injector problem: The injector tip is easily clogged and when it clogs the engine will start misfiring. And in some cases, you will see irregular color smoke from the engine, sometimes white and sometimes black. It will also affect the sound of the engine.
Solutions: If you notice the above-mentioned problem, then you need to check the injectors, you can do some maintenance on it or replace it.
Another thing to do is regular fuel filter replacement. If the fuel filter is not replaced as of when due, the dirt from the filter will clog the injectors.
2. Oil and coolant mixture. Cummins 855 uses a wet sleeve, so if the liner seal has a problem, then the coolant will go to the oil.
Solutions: Prevent the engine from overheating. If the engine overheats, it will damage the liner seal and cause it to leak coolant.
3. Broken valve bridge: There’s instances where the valve bridge brakes. The valve bridge is the component that links the two valves together such as the two intakes and the two exhaust valves.
Solutions: Don’t allow the engine to overspeed or simply call the engine runaway. If the engine over-speeds, the valve is one of the components that suffer the most so in most cases, it gets broken.
Another reason that breaks the valve bridge is poor valve setting. Ensure you follow the correct valve lash and use a filler gauge to adjust the valve setting. Poor valve adjustment can cause the valve bridge to break.
4. Low Oil Pressure: This can be caused by worn bearings, a faulty oil pump, or clogged oil passages. Solution: Inspect and replace worn components, clean the oil passages, and ensure proper oil level.
Regular maintenance, fast diagnosis of problems, and timely repairs are essential for keeping the Cummins 855 engine running smoothly and avoiding major issues. At ProDieselParts, we provide high quality aftermarket parts for the all Cummins Series 855 engine. We provide parts for the Cummins NH855, NT855, NH220 With expert guidance, competitive pricing, and commitment to customer satisfaction, we make it easy for you to keep your engine running smoothly.
Whether you’re in need of routine maintenance parts or facing a more complex repair, ProDieselParts is your trusted partner for all your Cummins engine needs. We take pride in providing complete solutions for Cummins engine owners.