RELIABILITY: Features high-temperature epoxy insulation and heavy-duty rectifiers to ensure stable performance in extreme engine room conditions.

Key Features

• ✔ 100% Brand New - No core charge
• ✔ Direct fit for Caterpillar industrial equipment
• ✔ High-grade bearings for extended service life
• ✔ 1-Wire System with R/I terminal support

Technical Specs

Voltage:	24V
Amperage:	70A
Type:	Delco 21SI
Rotation:	Clockwise (CW)
Regulator:	Internal (IR)
B+ Terminal:	1/4-28
Polarity:	Negative Ground

Application Type	Model Series	Engine / Year
Wheel Loader	Caterpillar 966F / 980G	1996-2003 Applications
Excavator	Caterpillar 320B / 345B / 365B	Heavy Duty Chassis
Motor Grader	Caterpillar 16H	1996-1999 Fits
Soil Compactor	Caterpillar 815F	1996-2000 Fits
Industrial Grader	Champion 710A / 716A	Cummins 5.9L

This part replaces the following manufacturer part numbers:

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance in heavy industrial environments.

How do I know if it is compatible?

We recommend checking the SKU/MPN (ADR0047) and Cross Reference list above. If your current alternator matches part number 107-7977 or 132-2156, this is the correct replacement.

Does this unit include the chaff screen?

This specific ADR0047 model is typically supplied without the chaff screen. If your application requires one, you can usually transfer the screen from your original 21SI unit.