SHAFT 2440658 - Caterpillar

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.
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.
When you operate the machine in ambient temperatures below 4° C (40° F), cooler covers are recommended to maintain normal hydraulic operating temperatures. When the ambient temperature is above 4° C (40° F), the cooler covers are not required.
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 oil pressure reaches the normal operating range and the temperature gauge begins to move, you may operate the machine at full load.
Monitor 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 RAISED or LOWER position. Hold the dozer in the RAISED or LOWER 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.Engine Cooling Fan Bypass (If Equipped)
On machine 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 0 C (32 F) or warmer. The park brake must be