BEARING 1402492 - Caterpillar

Introduction
For Specifications with illustrations, make reference to SPECIFICATIONS for 3400 GENERATOR SET ENGINE ATTACHMENTS, Form No. SENR2538. If the Specifications in Form SENR2538 are not the same as in the Systems Operation and the Testing and Adjusting, look at the printing date on the back cover of each book. Use the Specifications given in the book with the latest date.Fuel System
Duplex Fuel Filter System (3412 Engines)
CONTROL LEVER IN "FLOW BOTH" POSITIONThe duplex fuel filter system makes it possible to change filter elements when the engine is in operation without a shutdown.When the fuel pressure gauge indicator is in the RED range, the fuel filters must be changed.The steps that follow give instructions for the operation of the duplex fuel system.1. With lever at "AUX. RUN" position, start engine. Left gauge should indicated full pressure. Right gauge should indicate no pressure.2. With lever at "LH FLOW - RH FILL" position, left gauge should indicate full pressure. Within five minutes running, the right gauge should indicate a very small amount of pressure.3. With lever at "FLOW BOTH" position, both gauges should indicate full pressure. Look for leaks.4. With lever at "RH FLOW - LH FILL" position, left gauge should indicate a very small amount of pressure. Right gauge should indicate full pressure.5. With lever at "MAIN RUN" position, left gauge should indicate no pressure. Right gauge should indicate full pressure.6. The lever should be in the "MAIN RUN" position for normal operation.Electrical System
The engine electrical system has two separate circuits: the charging circuit and the starting circuit. Some of the electrical system components are used in more than one circuit. The battery (batteries), disconnect switch, circuit breaker, ammeter, cables and wires from the battery are all common in each of the circuits.The charging circuit is in operation when the engine is running. An alternator makes electricity for the charging circuit. A voltage regulator in the circuit controls the electrical output to keep the battery at full charge.
The disconnect switch, if so equipped, must be in the ON position to let the electrical system function. There will be damage to some of the charging circuit components if the engine is running with the disconnect switch in the OFF position.
If the machine has a disconnect switch, the starting circuit can operate only after the disconnect switch is put in the ON position.The starting circuit is in operation only when the start switch is activated.The low amperage circuit and the charging circuit are both connected through the ammeter. The starting circuit is not connected through the ammeter.Charging System Components
Alternator (Delco-Remy)
The alternator is driven by V-type belts from the crankshaft pulley. This alternator is a three phase, self-rectifying charging unit, and the regulator is part of the alternator.This alternator design has no need for slip rings or brushes, and the only part that has movement is the rotor assembly. All conductors that carry current are stationary. The conductors are: the field winding, stator windings, six rectifying diodes, and the regulator circuit components.The rotor assembly