SEAL-O-RING 2275904 - Caterpillar

Gauges
Gauges provide a "look" inside the engine. Be sure they are in good working order. You can determine what is "normal" operating range by observing the gauges over a period of time. The cause of any sudden or significant change in the readings should be determined and corrected.Fuel
Indicates the level of fuel in the tank. Electrically operated, it registers only when the key switch is ON.Fuel Pressure
Indicator should register in the NORMAL (green) range. When the filter element becomes clogged, the indicator moves to OUT (red) 20 psi (140 kPa). When indicator registers below 20 psi, wash the primary fuel filter and replace the secondary fuel filter element.Ammeter
Indicates the rate of battery charge or discharge.Tachometer
Indicates engine RPM.Oil Pressure
Registers between 45 and 70 psi (310 and 480 kPa) when the engine is running at rated engine speed, with SAE 30 oil, at operating temperature. A lower pressure is normal at low idling speeds. If no pressure is indicated, stop the engine immediately.Water Temperature
Normally registers between 170°F and 195°F (77°C and 90°C). Somewhat higher temperatures may occur under certain conditions.Engines Equipped With Glow Plug Starting Aid
Starting fluid is volatile and must be stored away from heat and direct sunlight. If an aerosol container is used, follow the instructions on the container.
1. Remove the load from the engine.2. Move throttle to low idle.3. Turn the key switch to ON.4. Turn the HEAT-START switch to HEAT or START, as indicated by the Starting Aid Chart.5. After the indicated heat time, move the switch to the START position. If starting fluid is necessary, discharge the starting fluid capsule, or spray starting fluid into the air cleaner inlet. (If the engine fails to start within 30 seconds, release the starter switch. Wait 2