HOSE AS 2830916 - 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 in order to protect your engine and hydraulic components.
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 is to:
Maintain desired coolant temperature.
Maintain desired operation of engine systems.
Maintain desired operation of the regeneration system.Hydraulic System
When you cycle the machine controls, the machine can move suddenly. Contact between the machine and external objects or ground personnel can result in serious injury or death. Before you cycle the machine controls, the machine should be located in an unobstructed, hazard-free work area that is away from external objects and ground personnel.
Make sure that the area is clear of personnel and equipment. Note: The hydraulic lockout control must be in the UNLOCKED position before the hydraulic controls will function.
Allow the engine to warm up at low idle for at least 5 minutes. Engage the work tool controls and disengage the work tool controls in order to speed up the warm-up of the hydraulic components. When you idle the machine for warm-up, observe the following recommendations:
If the temperature is greater than 0°C (32°F), warm up the engine for approximately 15 minutes.
If the temperature is less than 0°C (32°F), warm up the engine for approximately 30 minutes.
If the temperature is less than − 18°C (0°F) or if hydraulic functions are sluggish, additional time may be required.
To warm up the hydraulic oil, turn the engine speed dial to the medium engine speed. Run the engine for approximately 5 minutes and move the joystick intermittently from the BUCKET DUMP position to the HOLD position. Do not hold the joystick in the BUCKET DUMP position with the bucket cylinder fully extended for more than 10 seconds.
Turn the engine speed dial to the maximum engine speed and repeat Step 3. This allows the oil to attain relief pressure, which causes the oil to warm up more rapidly.
Cycle all controls in order to circulate warm oil through all hydraulic cylinders and all hydraulic lines, and through the swing motor and travel motors.
Observe the gauges and the indicators frequently during the operation.