Skip to product information
1 of 7

24V 100A Alternator Perkins Engines 2871A902 Caterpillar 378-9640 C6.6 C7.1

24V 100A Alternator Perkins Engines 2871A902 Caterpillar 378-9640 C6.6 C7.1

SKU:400-29038

Regular price £382.20 GBP
Regular price £458.64 GBP Sale price £382.20 GBP
Sale Sold out
Taxes included. Shipping calculated at checkout.

Free shipping over £150. Terms apply

24V 100A ALTERNATOR (SKU: 2871A902)

Heavy-Duty Charging Solution for Perkins & Caterpillar

This 24V 100A high-output alternator is engineered for the demanding environments of industrial and agricultural machinery. Specifically designed for Perkins and Caterpillar engine platforms, this unit provides a stable and powerful electrical supply to support complex onboard electronics and heavy charging requirements.

RELIABILITY: Manufactured with high-temperature epoxy and premium bearings to meet or exceed original equipment (OE) standards for long-term industrial service.

Key Features

  • ✔ Direct fit for Perkins & CAT engines
  • ✔ High-output 100 Amp capacity
  • ✔ Internal Regulator & Fan (IR/IF)
  • ✔ Robust Spool Mount design

Technical Specs

Voltage: 24V
Amperage: 100A
Rotation: CW (Clockwise)
Regulator/Fan: Internal (IR/IF)
Mount Type: Spool (2-Hole)
B+ Terminal: M8 x 1.25

Compatibility / Fitment Guide

Make/System Model/Application Notes
Perkins Engines 1100, 1106D, 1206 Series Agricultural & Industrial
Caterpillar C6.6 ACERT, C7.1 Engines Excavators & Compactors
CAT Machinery CS-56B, CS-74B, CW-34 Vibratory Compactors
Deutz Engines BF6M1013, BF6M1013C Compatible Application

OEM Cross Reference

Perkins 2871A902, 2871A901, 2871A903
Caterpillar (CAT) 378-9640, 3789640, 20R4763
Mahle / Iskra MG142, AAN5124, 11.203.102, 11.203.502
Claas / Steyr 05011080, 2205660, 22056600

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured by 4Drive to meet or exceed original equipment (OE) standards for fitment and performance in heavy industrial use.

How do I know if it is compatible?

Check your original alternator for the numbers 2871A902 or 378-9640. If your part matches any of the numbers in our Cross Reference table, this is a guaranteed fit.

Does this unit include the pulley?

This unit is typically supplied without a pulley, allowing you to reuse your existing pulley to ensure exact belt alignment with your specific engine configuration.

Note: 4drive.co.uk recommends professional installation. Please verify your original part number against the references above before purchasing.

View full details
Shipping calculated at checkout. Free shipping over £150. Terms apply