Proper operation and maintenance are key factors in obtaining the maximum life and economy of the engine. If the directions in the Operation and Maintenance Manual are followed, costs can be minimized and engine service life can be maximized.
The time that is needed for the engine to reach normal operating temperature can be less than the time taken for a walk-around inspection of the engine.
The engine can be operated at the rated rpm after the engine is started and after the engine reaches operating temperature. The engine will reach normal operating temperature sooner during a low engine speed (rpm) and during a low-power demand. This procedure is more effective than idling the engine at no load. The engine should reach operating temperature in a few minutes.
Gauge readings should be observed and the data should be recorded frequently while the engine is operating. Comparing the data over time will help to determine normal readings for each gauge. Comparing data over time will also help detect abnormal operating developments. Significant changes in the readings should be investigated.
The hydrocarbon mitigation is a feature to protect the DOC against temperatures below
- First : Key cycle to warning
- Secondary : Warning to shut down
If the warning messages are not acknowledged, then the shutdown counter begins. Once the engine has shutdown for low exhaust temperatures, the 173-18 Engine Exhaust Manifold #1 Temperature #1: Low - Moderate Severity (2) will return until the engine has successfully reached target temperatures.
Once exhaust temperatures below
The cylinder cutout starts at 1000 rpm. The hydrocarbon mitigation monitors the exhaust and intake target temperatures and increases speed if temperatures are not achieved in intervals. The intervals are 20 minutes and with 200 rpm increments. The speed range for the strategy is 1000 rpm to 1800 rpm with a minimum run time of 100 minutes.
Note: This strategy only runs in non-work mode.
The strategy success criteria is based on the following:
- Intake air manifold temperature over
10° C (50° F)
- Exhaust manifold temperature over
325° C (617° F)
If successful, the machine will continue to run indefinitely at the current rpm until taken out of non-work mode.
Once the 173-18 Engine Exhaust Manifold #1 Temperature #1: Low - Moderate Severity (2) warning message is shown, there are two actions the can be taken to remove them:
Put the machine in Non-Work mode.
- This will allow Hydrocarbon Mitigation to start automatically and attempt to achieve the target temperatures for the intake and exhaust.
- If the strategy does not achieve target temperatures, the engine will return to low idle for 60 minutes and then Hydrocarbon Mitigation begins.
- If the strategy continues to fail, the next action will need to be taken to clear the codes.
If the machine is being used at the time of the warning message and cannot be put into Non-Work mode, then raise the intake and exhaust temperature for their time thresholds.
- Intake air manifold temperature is greater than
10° C (50° F)for 10 minutes continuously
- Exhaust manifold temperature is greater than
325° C (617° F)for 30 minutes continuously
- Blender - Ideal time to perform this is during the 60 minute low time after a Hydrocarbon Mitigation failure.
Note: Hydrocarbon Mitigation will always start mitigation.
Extended operation at reduced load (less than 30%) may cause increased oil consumption and carbon buildup in the cylinders. Extended operation at reduced load may also cause fuel to slobber through the exhaust system. A loss of power and/or poor performance may result.
To maintain engine efficiency and performance, apply 70% load to the engine on an hourly basis. Operating the engine at a load level that is greater than 30% will also maintain engine efficiency and performance. This action will burn excess carbon from the cylinders.