Usage:
After the engine starts, and at frequent intervals while the engine is operating, the gauges should be observed for proper readings.
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 approximately 30 PSI (NORMAL) at engine high idle. When the indicator drops below approximately 25 PSI, wash primary fuel filter and replace final filter.
Ammeter
Indicates the rate of battery charge or discharge.
Tachometer
Indicates engine RPM. The engine can be operated between rated speed and high idle without damage, but should not be allowed to overspeed (such as when going downhill).
Oil Pressure
Registers between 45 and 60 psi when the engine is running at rated engine speed with oil at operating temperature. A lower pressure (10 psi minimum) is normal at lower idling speeds. If no pressure is indicated, stop engine immediately.
Water Temperature
Normally registers between 170° (77°C) and 195°F (90°C). Somewhat higher temperatures may be experienced under certain conditions. Maximum allowable temperature 210°F (99°C).