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Keep engine speed low until the engine oil pressure registers on the gauge or the engine oil pressure indicator light goes out. If it does not register or the light does not go out within ten seconds, stop the engine and investigate the cause before starting again. Failure to do so, can cause engine damage. |
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Always run the engine at low idle for at least ten minutes before performing any other operations in cold conditions to protect your engine and to protect your transmission. |
The engine may automatically change speeds when the machine is stationary and idling in cold ambient temperature for an extended time. This action is to:
- Maintain desired coolant temperature.
- Maintain desired operation of engine systems.
- Maintain desired operation of the regeneration system.
During extended idling in cold ambient conditions, engine speed may operate between 1000 rpm and 1600 rpm. Operation at 1600 rpm is minimal and will only last for up to 20 minutes. The high exhaust system temperature indicator may also illuminate during extended idling conditions to signal that a low speed regeneration is in progress. A regeneration done in cold ambient extended idling conditions may activate below 30% soot level. A regeneration done in cold ambient extended idling conditions will typically last for 5-10 minutes.
After the engine has been started, allow the monitoring system to complete the self test.
- Allow a cold engine to warm up at LOW IDLE for at least 5 minutes. To help the hydraulic components to warm up faster, engage the attachment controls and disengage the attachment controls.
- You can begin to operate the machine with a reduced load.
- When the engine coolant temperature reaches the normal operating range and no faults are present, you may operate the machine at full load.
- Look at the indicators and the gauges frequently during operation. Refer to Operation and Maintenance Manual, "Monitoring System".
- Check oil levels in the power train, the engine, and the hydraulic systems when the oil is at operating temperature. Maintain the oil levels to the FULL marks.
The hydraulic oil will warm up faster, if the dozer blade control is held in the CLOSED position. Hold the dozer in the CLOSED position for short periods of 10 seconds or less. This action will allow the hydraulic oil to reach relief pressure, which causes the hydraulic oil to warm up more rapidly.
Cycle all controls in order to allow warm hydraulic oil to circulate through all hydraulic cylinders and through all hydraulic lines.
When you idle the engine in order to warm up the engine, observe the following recommendations:
- Allow the engine to warm up for approximately 15 minutes when the temperature is higher than
0°C (32°F) . - Allow the engine to warm up for approximately 30 minutes or more when the temperature is below
0°C (32°F) . - More time may be required if the temperature is less than
−18°C (0°F) . More time may also be required if the hydraulic functions are sluggish.
Note: If the engine is running at low idle with the parking brake ON and the engine coolant temperature below
Engine Cooling Fan Bypass (If Equipped)
On machines equipped with the Engine Cooling Fan Bypass feature in cold ambient conditions, the machine fan speed will be automatically reduced to minimize cold airflow across the engine compartment. This feature activates 10 minutes after the hydraulic tank temperature reaches