SEAL-VALVE COVER 2429537 - Caterpillar

If the engine is equipped with the standard Caterpillar mechanical engine or remote mounted instrument panel, then the following information will describe your engine protection system. Refer to the locomotive OEM manual for other systems.Alarm System Information
Alarm systems consist of a sensor and contactor. The sensor such as magnetic pickup for detecting speed, or pressure and temperature sensors are wired to a contactor which activates an alarm circuit in the Alarm Annunciator Panel. Alarm switches and sensors are set at a less critical temperature, level, or pressure than shutdown controls.The alarm annunciator panel has visual (light) and/or an audible system to warn the operator of a malfunction or abnormal engine operating condition. Each alarm contactor and switch is electrically connected to the visual or audible system. When an alarm is activated, corrective measures should be taken before the situation becomes an emergency. If corrective measures are not taken within a reasonable time, engine damage could result, or if equipped, a corresponding shutdown device will stop the engine.The alarm will continue until the condition is corrected or the alarm is silenced by the operator. The light will remain illuminated.The alarm circuits merely warn the operator, they do not shut the engine down to protect it from damage. The following examples are some of the typical switches used for alarms, which can vary from installation.Junction Box (If Equipped)
The junction box (module or remote mounted) is utilized to terminate all of the wiring to and from the alarm and shutdown components. It may also contain a fuel shutoff solenoid switch, an emergency stop pushbutton (ESPB), and circuit breakers which are used for circuit protection.The electrical system may be an energized-to-run (ETR) or an energized-to-shutdown (ETS) system. Refer to the Service Manual, OEM or governor manual for your particular electrical system schematics.Alarm System Sensors
The following are typical switches used for alarms and are optional for each installation.* Lubrication SystemLow Oil Pressure Alarm
The oil pressure switch senses oil pressure at the bearing oil gallery. The alarm is set at 120 20 kPa (17 2 psi) at LOW rpm (less than 650 rpm) and 320 20 kPa (46 2 psi) at HIGH rpm (greater than 650 rpm). No resetting procedure is required. The contactors are located next to the engine mounted junction box if equipped with the EGB-P type governor and inside the PGEV governor if equipped.Low Oil Level Alarm
The low oil level alarm switch, which is used to determine when the oil level is low, is mounted in the side of the crankcase sump. When the oil level is near the low level, oil must be added to the crankcase to fill to the proper sump level to reset the alarm and avoid possible engine damage.High Oil Temperature Alarm
The alarm switch senses oil temperature. The switch opens as the oil cools, and the annunciator panel has to be reset. The alarm is set to trip at 93 2°C (199 4°F).
The sensing elements must be submerged in the