SPRING 1M4593 - Caterpillar

Governor Controls
Various types of governor controls can be installed on engines according to the application. The most common control is direct mechanical. The control may be mounted either on the engine or on a remote control panel. Engine mounted controls normally consist of a positive locking handle connected directly to the governor shaft. Cables and vernier controls mount on the engine or on a control panel.Shutdown controls are used only to stop the engine. Mechanical or electrical controls are commonly used. These devices stop the gas flow. Shutdown controls allow the engine to be restarted after shutdown without readjusting the speed controls. Shutdown controls are usually found on Automatic Start-Stop installations.Gauges
OIL PRESSURE
WATER TEMPERATUREGauges 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.OIL PRESSURE - Oil pressure is normally greatest when starting a cold engine. As the oil warms up it will produce less pressure. Oil pressure is greater at operating speeds than at low idle. Fluctuating readings can mean air in the oil or a sticking pressure relief valve. Stop the engine immediately if a sudden loss of oil pressure occurs.WATER TEMPERATURE - The operating temperature is determined by the water temperature regulator. High coolant temperatures mean the cooling system is not dissipating enough engine heat. Pressurized cooling system gauges are marked with ranges rather than temperatures. If the gauge indicates in the red range, the cooling system should be inspected.The minimum operating temperature should not be below the opening temperature of the water temperature regulator.In cold weather the temperature gauge may fluctuate in or near the cold range. This indicates the engine is being overcooled. In these instances the use of radiator louvers is suggested.
AMMETERAMMETER - The ammeter should register in the charging range when the engine is running above low idle. If the gauge registers a discharge when the engine speed is increased, determine the cause.Automatic Start-Stop
An automatic start-stop system ensures that power is supplied to a load when the normal power source is interrupted. The cranking panel is the heart of the system and consists of the failure warning system and relays to start and stop the engine. When a power failure occurs the system senses the failure and starts the engine to transfer the load to standby. When power is restored, it senses and transfers the load from standby and stops the engine. The major use of automatic start-stop systems is standby electric sets and this discussion is limited to that application.If a power failure occurs, a circuit breaker opens and a set of contacts in the transfer switch closes, completing the circuit to the starter motor. When the engine starts, the starter circuit opens, protecting the starter from overspeed damage.Since a standby engine is usually unmanned, it is usually protected from mechanical malfunction by a