KIT-FRONT COVER GASKET 4502539 - Caterpillar

KEEL COOLING SYSTEM FLOW DIAGRAM
1. Expansion tank. 2. Coolant external bypass line (D330C and D333C); elbow with internal bypass for coolant (3304 and 3306). 3. Temperature regulator housing or elbow. 4. Water cooled exhaust manifold shield. 5. Cylinder head. 6. Expansion tank outlet line. 7. Cylinder block. 8. Oil cooler bonnet (flow divided to exhaust manifold shield, marine gear oil cooler, if so equipped, and cylinder block). 9. Water pump. 10. Marine gear oil cooler (D330C and D333C). 11. Engine oil cooler. 12. Keel cooling coil.Electrical System
The electrical system is a combination of three separate electric circuits: the charging circuit, the starting circuit and the lighting or load circuit. Each circuit is dependent on some of the same components. The battery (batteries), ammeter, cables and wires from the battery are common in each of the three circuits.The charging circuit is in operation when the diesel engine is operating. The electricity producing (charging) unit is a generator or alternator. A regulator in the circuit senses the state of charge in the battery and regulates the charging unit output to keep the battery fully charged.The starting circuit operates only when the start switch is actuated.The direct electric diesel engine starting circuit may include a glow plug for each diesel engine cylinder. The glow plugs are small heating elements in the precombustion chambers which promote fuel ignition when the engine is started in low temperatures.The low amperage load and charging circuits are both connected on the same side of the ammeter while the starting circuit connects to the other side of the ammeter.System Components
Never operate the alternator without the battery in the circuit. Making or breaking an alternator connection with heavy load on the circuit will sometimes result in regulator damage.
Alternator (Delco)
ALTERNATORThis alternator is a three phase self-rectifying charging unit.The alternator has four main components: end frame assembly (brush end), rotor assembly, stator and shell assembly, and end frame assembly (drive end).Regulator (Delco)
A separate regulator senses the charge condition of the battery as well as electrical system power demand and controls the alternator output accordingly by limiting the field current.
ALTERNATOR REGULATOR
1. Hollow head screw. 2. Connector.
ALTERNATOR CHARGING CIRCUIT-SCHEMATIC (Negative Ground System Illustrated)Alternator (Motorola)
The alternator is belt driven from the crankshaft pulley. It is a three-phase self-rectifying charging unit with three main functional parts: A rotating magnetic field (rotor) which produces flux; a stationary armature (stator) in which alternating current is induced; and stationary rectifying diodes that change alternating current to direct current.The alternator field current is passed through brushes. The field current is in the order of 2 to 3 amperes. The rectifying diodes will pass current from the alternator to the battery or load, but will not pass current from the battery to the alternator.
ALTERNATORRegulator (Motorola)
The separate transistorized voltage regulator is an electronic switching device. It senses the voltage in the system at the oil pressure switch and supplies the necessary field current to maintain the required system voltage. The voltage regulator has two basic "circuits." The "load circuit" conducts