Thank you for viewing our most popular alternators for heavy duty and industrial use. Please note, the information contained in this section covers only a very small portion of our overall application base. If you cannot find your unit here, return to the Home Page and begin the search for the correct part, using our standard database of 90,000 OEM numbers.

Alternators* for Mack, Cummins, Caterpillar or Detroit Diesel (1) engines

Alternators for Mack, Cummins, Caterpillar or Detroit Diesel engines can be one of four different types.

The 22SI type is the most popular Delco style we stock. Our part number is 105-19103 and is a 145amp, 12 volt negatively grounded unit. 22SI units also come in pad mount configurations to fit Detroit Diesel Series 60 engines. Both these types of units are replaced with part number 105-17101P, rated at 145 amps.
The 21SI type is the older version of the Delco type 22SI. Our part number for this unit is 105-15101 and is a 130amp, 12 volt negatively grounded unit. Any 22SI unit can be used in place of 21SI units
The Motorola type 110-555 is a 130amp, 12 volt negatively grounded unit and is known under the trade name of Load Handler. Our part number on this unit is 116-15101. Motorola units are made by Leece-Neville. 110-555P is the pad mount configuration for this application, and can be used to fit Detroit Diesel Series 60 engines.
The Leece-Neville types JB and LC series come in two levels of output. Both are 12V and the 130 amp unit is part number 109-15101 and the 160 amp unit is 109-19101.

Important note…all of the alternators listed above have the same mounting configuration. However, because of certain design restrictions relative to the hardware used by the various engine makers, only the Delco style units can be positively interchanged with each other. The Leece-Neville and Motorola units likewise can be interchanged with each other. It is a fact that in most cases all can be interchanged, however it is a good idea to stay with the type unit you are replacing, and never replace a unit with one putting out less amps. (1) Some newer Detroit Diesel units have a “pad mount” configuration. Make sure to compare your current alternator mounting for the correct fit. For additional information, same day shipping and pricing Contact Us.

All of our electrical units are made new as replacements for the OE types noted in our website information. We require no core return on any sale and our warranty is as outlined in the Policy section of our site.

*The alternators noted above can appear on highway tractors, construction vehicles, trash haulers, dump trucks or any other kind of equipment that is powered by Mack, Cummins, Caterpillar or Detroit Diesel engines.