AJ-ELECTRIC 4874JB / A0014874JB Premium Heavy-Duty 270 Amp Leece-Neville Replacement Alternator

Premium-quality heavy-duty alternator designed as a direct replacement for Leece-Neville 4874JB, A0014874JB and related heavy-duty J-180 alternators used in RV, motorhome, bus and heavy-duty applications.

12 Volt • 270 Amp • J-180 Mount • DUVAC / Multi-Battery System

Designed for multi-battery applications including motorhomes and RVs equipped with DUVAC dual/multi-battery charging systems, helping charge and maintain both chassis/starting and coach/house battery systems.

KEY FEATURES

• Original factory-rated 14 Volt, 270 Amp output
• Heavy-duty J-180 mounting
• DUVAC / dual and multi-battery system compatible
• Ignition excite
• Internal solid-state voltage regulator
• Internal rectifier
• External fan
• Sealed high-speed bearings
• Steel inserts in heavy-duty mounting frames
• Computer tested for consistent output and reliability
• Exact-fit replacement design
• Includes simple hookup instructions
• Full Two-Year Warranty
• Assembled in the USA with U.S. and imported components

OEM & INTERCHANGE NUMBERS

Leece-Neville / Prestolite:
4874JB, A0014874JB, ZLN4874JB, 3971416

Blue Bird: 0048145
Champion Motor Coach: 3972426
Daimler / Freightliner: LN4874JB
International: 4874JB, ZLN4874JB
Monaco: 1010-4268, 10104262
Volvo: LN4874JB
Delco Remy: 8600280 (40SI, 12V 275A replacement)

APPLICATIONS

Heavy-duty alternator used in RV, motorhome, bus, industrial and medium/heavy-duty truck applications, particularly vehicles equipped with multi-battery or DUVAC charging systems.

Application references include:

Blue Bird • Custom Chassis • Champion Motor Coach • Cummins ISL applications • Daimler/Freightliner • International • Mack • Monaco • Dynasty • Diplomat • Spartan Motors • Volvo

TECHNICAL SPECIFICATIONS

System Voltage: 12V
Rated Output: 270 Amps
Charging Voltage: 14V setpoint
Mounting: J-180
Excitation: Ignition Excite
Regulator: Internal
Rectifier: Internal
Fan: External
Mounting Bolt: 1/2-13 UNC
Positive Stud: 5/16-18 UNC

DUVAC / MULTI-BATTERY CHARGING

This alternator is designed for multi-battery applications using a DUVAC dual-battery charging/isolator system, commonly found in motorhomes and RVs. It is designed to support charging of both chassis/starting and coach/house battery systems.