PUMP GP-GEAR 2702721 - Caterpillar

Keep engine speed low until the engine oil pressure registers on the gauge or the engine oil 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.
Keep engine speed low until the engine oil pressure indicator light goes out. If the engine oil pressure indicator light does not go out within ten seconds, stop the engine. Investigate the cause of the problem before you start the engine again.
After the engine oil pressure indicator light goes out, gradually increase the engine speed to approximately 1200 rpm.
When the engine is cold, operate the engine at low idle for approximately two minutes.Cycle all controls in order to allow warm oil to circulate through all hydraulic cylinders and through all hydraulic lines. This will help to warm up the hydraulic components.While you idle the engine for warm-up, observe the following recommendations:
If the temperature is greater than 0° C (32° F), warm up the engine for approximately 2 minutes.
If the temperature is less than 0° C (32° F), warm up the engine for approximately 10 minutes.
If the temperature is less than - 18°C (0°F) or if hydraulic functions are sluggish, additional time may be required.Note: Avoid excessive idling. If you must idle the engine for more than 5 minutes, increase the engine speed to approximately 1200 rpm.
During machine operation, frequently look at the indicator lights and the gauges.
Check the hydraulic oil level and the transmission oil level. Maintain the oil levels to the "FULL" mark.