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DIESEL TABLE OF CONTENTS WE STOCK PARTS FOR ALL MAKES OF DIESEL ENGINES. We stock genuine Mercruiser parts as well as aftermarket replacements. We also discount all our parts! If you want a quote on a specific part fill out the info form and we will reply with a delivered price. If you don't know your parts number send as much info as possible and one of our techs will take care of it for you. These pages are just a representation of the 200,000 DIESEL ENGINE parts we stock! FILL OUT THE INFO FORM AND WE WILL QUOTE YOU THE BEST POSSIBLE PRICE. CHECK OUT THE ONLINE SHOPPING AREA TO INSTANTLY PURCHASE A DIESEL PRODUCT. DETROIT DIESEL SEALS, SLEEVES, BLOWER GASKETS FUEL INJECTORS HV & 92 SERIES ENGINE & CYLINDER HEAD OVERHAUL KITS OIL PAN & ROCKER COVER GASKETS FUEL PUMPS & SILENCERS THERMOSTATS CLUTCH BEARINGS, GAUGES, SWITCHES PISTONS BLOWER REPAIR KITS FUEL INJECTORS C & N SERIES ENGINE REBUILD KITS CYLINDER HEADS & EXHAUST VALVES PISTON RING SETS CRANKSHAFTS & CAMSHAFTS MAIN BEARING KITS, CONNECTING RODS ROD SHELL KITS BEARINGS , CAM & BALANCER SHAFT WATER PUMPS 51 & 71 WATER PUMPS 71 SERIES WATER PUMPS 8.2L & 92 SERIES DETROIT 671TI, 871, 1271 & 1671 RAW WATER PUMP DETROIT 353, 453 & 471 RAW WATER PUMP DETROIT 653, 671 & 853 RAW WATER PUMP VOLVO DIESEL VOLVO DIESEL perkins engine & CYLINDER HEADS VOLVO DIESEL 2000, 2003, MD1 EXHAUST SYSTEM VOLVO MD2B & MD3 EXHAUST MD5, MD6, MD7 EXHAUST SYSTEMS MD11, MD17 EXHAUST VOLVO 31 & 41 SERIES EXHAUST SYSTEM VOLVO 30 & 40 SERIES EXHAUST SYSTEM VOLVO 21, 32 & 42 SERIES EXHAUST SYSTEMS VOLVO THERMOSTAT KITS,CIRC PUMPS & REPAIR KITS VOLVO RAW WATER PUMPS & PARTS WATER PUMPS RAW WATER JABSCO, PERKINS, CATERPILLAR, ONAN, DAYTONA, LEHMAN FUEL SYSTEMS FLOSCAN FUEL FLOW COMPUTERS 8000-9000 SERIES GAS AND DIESEL RACOR GAS & DIESEL TURBINE FILTER SYSTEM RACOR GAS & DIESEL SPIN-ON FILTER RACOR LIQUID FILTRATION SYSTEM RACOR CRAKCASE VENTALATION SYSTEM That's all well and good, but just exactly what does all that mean? To get a good idea, it is first necessary to understand how an alternator works. You don't need an engineering degree, just a basic understanding of the general principles. Figure 1, below, is a block diagram, or a "functional" diagram, of an alternator, and its connections to the remainder of the automobile electrical system. Following the figure is a description of the various components that make up an alternator, and a description of how each operates to keep the battery charged in your car. ALTERNATOR ROTOR We'll start our tour of the alternator where it all starts in the alternator itself - at the alternator rotor. The rotor consists of a coil of wire wrapped around an iron core. Current through the wire coil - called "field" current - produces a magnetic field around the core. The strength of the field current determines the strength of the magnetic field. The field current is D/C, or direct current. In other words, the current flows in one direction only, and is supplied to the wire coil by a set of brushes and slip rings. The magnetic field produced has, as any magnet, a north and a south pole. The rotor is driven by the alternator pulley, rotating as the engine runs, hence the name "rotor." STATOR Surrounding the rotor is another set of coils, three in number, called the stator. The stator is fixed to the shell of the alternator, and does not turn. As the rotor turns within the stator windings, the magnetic field of the rotor sweeps through the stator windings, producing an electrical current in the windings. Because of the rotation of the rotor, an alternating current is produced. As, for example, the north pole of the magnetic field approaches one of the stator windings, there is little coupling taking place, and a weak current is produced, As the rotation continues, the magnetic field moves to the center of the winding, where maximum coupling takes place, and the induced current is at its peak. As the rotation continues to the point that the magnetic field is leaving the stator winding, the induced current is small. By this time, the south pole is approaching the winding, producing a weak current in the opposite direction. As this continues, the current produced in each winding plotted against the angle of rotation of the rotor has the form shown in figure 2. The three stator windings are spaced inside the alternator 120 degrees apart, producing three separate sets, or "phases," of output voltages, spaced 120 degrees apart, as shown in figure 3. OUTPUT DIODES A/C voltage is of little use in a D/C system, such as used in an automobile, so it has to be converted to D/C before it can be used. This conversion to D/C takes place in the "output diodes" and in the "diode trio." Diodes have the property of allowing current to flow in only one direction, while blocking current flow in the other direction. The output diodes consist of six diodes, one pair for each winding. One of the pair is for the negative half cycle, and the other for the positive half cycle. As a result of this diode rectification, the output of the alternator looks as shown in figure 4. Surprisingly enough, the output of the alternator is not a pure D/C as one might expect, but a pulsating D/C. Because there are three windings, each with a positive and a negative half, by the time the voltage is passed through the diodes, there are six pulsations for each rotation of the rotor. This is close enough to D/C for most automotive components. Critical components, such as radios, have their own internal filtering circuits to further smooth out the waveform to a purer D/C. DIODE TRIO The diode trio consists, as the name suggests, of three diodes, one per phase, which provides field current to the alternator regulator. This output will be discussed in more detail later in the "field current supply" section. REGULATOR Diesel Engine Parts Trucks & Parts carries a wide assortment of used and rebuilt diesel engine parts. Our selection includes, crankshafts, engine blocks, oil pans, front timing covers, bell housings, perkins engine, cylinder heads, water pumps, flywheels, fuel pumps, aftercoolers, starters, alternators and much more. With close to 40 acres of heavy-duty truck parts between our two facilities, in Florida and Ohio, Trucks & Parts ranks as one of the biggest used parts operations in America. In addition, we sell a variety of used diesel engines, transmissions, front axles, rear axle cutoffs and many more heavy-duty truck parts. Visit our truck salvage and our parts salvage inventory as well. We encourage our international customers to contact us. Container load quantities of engines as well as engine parts are available for export. We stock diesel engine parts for most major truck engine manufacturers including Cat, Cummins, Detroit Diesel, Isuzu, Mitsubishi, Nissan, Mack, Ford, IHC, Volvo, Perkins, John Deere and others. |