CUP-BEARING 6K5528 - Caterpillar

Emergency shutoff devices are either electrically, mechanically or hydraulically operated. Familiarize yourself with the types and locations of the shutoff devices, the conditions which cause each control to function, and the resetting procedure required to start your engine.
Always determine the cause of shutdown, and have the necessary repairs made before restarting the engine.Emergency shutoff controls are for emergency use only. Do not use an emergency shutoff device for a normal stopping procedure.
Electric Shutoff Controls
The operation of all electric shutoff controls is similar: A critical operating condition actuates a switch in the sensing unit. The switch closes the circuit to the shutoff solenoid which moves linkage to bypass the fuel to the cylinders; thus stopping the engine. The shutoff control may require resetting before the engine can start.High Water Temperature Shutoff:
The shutoff switch is located in the water temperature regulator housing. Excessive water temperature closes the switch. No resetting procedure is required: As the coolant cools, the switch opens.
The sensing element must be submerged in the coolant to operate. A low coolant level cannot actuate the shutoff.
Low Oil Pressure Shutoff Switch:
This device is usually mounted on the side of the engine with oil lines connected to the switch. Low oil pressure closes the switch. Manually operated systems require resetting of this switch before starting. Automatic start-stop systems use a pressure switch which resets itself.To reset the switch, push the button until it latches. After the engine starts and develops oil pressure, the oil pressure will push the button to the extended running position.
The engine will not be protected if the engine is operated with the button latched in the START position.
If the button remains in the reset position, the engine oil pump is not developing normal oil pressure and a check should be made.Overspeed Shutoff Switch (Electro-Mechanical):
This switch is mounted either on the tachometer drive or on the governor. Excessive engine speed closes a switch by centrifugal force.
TWO INSTALLATIONS OF OVERSPEED SWITCHTo reset the switch, push the button marked RESET. The knob will remain down until the engine overspeeds.Overspeed Shutoff Switch (Electronic):
This switch is a magnetic pick-up which is mounted on the flywheel housing and senses engine speed. The control box is mounted on the engine block. Excessive engine speed closes a circuit breaker. To reset the switch, push arm of breaker to the run position.
This switch will not provide overspeed protection if there is no power to the control box.
Fuel/Oil Pressure Switch:
This switch is mounted in the fuel manifold between the clean side of the fuel filter and the fuel injection pump housing. Low fuel pressure (below 3 psi) opens the switch and the electrical circuit to either the shut off solenoid or the circuit between the alternator and the alternator regulator. Opening of these circuits prevents the battery from becoming discharged while the engine is stopped. This switch can also be used with an electric governor. In this application, oil pressure closes the switch to allow the electric governor to control engine speed.
This switch does not require