Reliable Power for Industrial & Construction Machinery
This 24-Volt 25-Amp alternator is a precision-engineered replacement for Isuzu industrial engines commonly found in excavators, generators, and heavy-duty equipment. Built to withstand the rigorous demands of construction environments, it ensures a stable and efficient charge for your vehicle's electrical system.
HEAVY-DUTY RELIABILITY: Manufactured with high-temp windings and premium bearings to meet or exceed OEM performance in extreme operating conditions.
Key Features
✔ Direct fit for 4BD1, 4BG1, 6BD1, 6BG1 engines
✔ Internal Regulator (IR) & External Fan (EF)
✔ Durable 1-Groove Pulley included
✔ Corrosion-resistant housing
Technical Specs
Voltage
24V
Amperage
25A
Rotation
Clockwise (CW)
Pulley Class
V1 (Single Groove)
Regulator
Internal (IR)
Polarity
Negative
Compatibility / Fitment Guide
Engine / Application
Model / Machine
Notes
Isuzu 4BD1 / 4BG1
Industrial Engines
24V Systems Only
Isuzu 6BD1 / 6BG1
Heavy Duty / Generator
Fits various power units
Hitachi Excavators
EX100, EX120, EX200-1, EX200-2
Check original part number
JCB Excavators
JS70, JS130, JS150
Standard 24V Hitachi Style
OEM Cross Reference
Hitachi
LR220-27, LR220-27B, LR220-27C
Isuzu
8-94338-847-0, 8-94338-847-1, 1-81200-249-1
Lester
12323
Lucas
LRA02531
Arrowhead
AHI0095
Questions & Answers
Is this a genuine original part?
This is a premium quality 4Drive aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.
How do I know if it is compatible?
We recommend checking your existing part's SKU/MPN against the cross-reference list above. If your original unit is a Hitachi LR220-27 or Isuzu 8943388471, this is a guaranteed fit.
Does this fit 12V Isuzu engines?
No, this is specifically a 24-Volt unit. Please verify your system's voltage before purchasing. Using a 24V alternator on a 12V system will cause electrical damage.
Note: Technical data provided by 4Drive (4drive.co.uk). Please verify your original part number before ordering.
