1. What causes injector failure on the 855 Cummins Engines?
These are the possible factors that cause injector failure;
a. Worn injector tip or other components
b. Engine overheating
c. Contaminated fuel
d. Inadequate maintenance
2. What are the signs of failing injectors on the Cummins 855
With the below signs you should check the injectors;
a. Fuel consumption increased
b. Engine misfiring and rough idling
c. Engine making knocking sound
d. The engine not starting or hard starting
3. How often should you change the oil filter on Cummins 855 Engines?
The oil filter should be changed when you replace the engine oil. You can replace it every 10,000 to 15,000 miles. Any of it that comes first should be used.
4. Can you use an aftermarket oil filter for Cummins 855 Engines?
Yes, you can use a high-quality aftermarket oil filter.
5. What is the voltage of the Cummins 855 starter?
It depends on the engine configuration; the starter could be 12 volts or 24 volts, and you can change from one volt to another. For example, you can change from 12 volts to 24 volts, and vice versa.
6. Why does the starter spin but not crank the engine?
There are a few reasons for that, such as;
a. Worn flywheel teeth
b. Worn solenoid
7. Can I replace the alternator of a Cummins 855 myself?
Yes, you can do that by following the following steps;
a. Disconnect the battery
b. Remove the alternator belt
c. Loosen the alternator bolts
d. Disconnect the wires attached to the alternator
e. Compare the replacement with the old alternator.
f. Install the new alternator, and tighten everything back.
8. What causes damage to the alternator of the Cummins 855 Engine?
a. Short circuit
b. Damage voltage regulator
c. Damaged wiring
d. Worn bearings
9. How many piston rings are there per piston on the Cummins 855?
The Cummins 855 piston has three piston rings per each. The first piston rings are called compression rings, the second are supported rings, and the last are the oil rings.
10. What causes piston ring failure in the Cummins 855?
a. Incorrect installation of the piston rings
b. Delay in changing the engine oil
c. Poor engine break-in process
d. Engine overheating
e. Low quality of fuel or oil.