Agricultural Alternator 12V 55A BN Version Lucas ID System for Landini, Massey Ferguson & Perkins Engines - Part Number: 1475922M92

The heavy-duty agricultural alternator (primary part number 1475922M92) is a 100% brand-new replacement unit (BN version) engineered to provide dependable battery charging and electrical reliability for tractors and farm machinery fitted with LUCAS ID electrical architecture, particularly across Massey Ferguson, Landini, and Perkins industrial and agricultural diesel engines. Operating at a nominal 12 V with an output current of 55 A, it incorporates a built-in internal voltage regulator and an integrated tachometer/rev-counter terminal connection (Terminal W) to drive dashboard engine speed displays. Constructed with a 3-hole mounting flange (including 1 threaded hole), an M6 main power terminal, and a CPA0008 plug socket, it is supplied without a pulley to allow direct reuse of the engine's original single or twin-groove drive pulley.

Key Features & Engineering Advantages

• 100% Brand-New Unit (BN Version): Built entirely from fresh factory components (copper windings, diodes, and sealed heavy-duty bearings); eliminates core deposit fees and reliability concerns associated with rebuilt units.
• Optimized Agricultural Charging Curve (12V / 55A): Delivers steady electrical replenishment even during low-RPM tractor tasks, powering auxiliary field worklamps, beacons, and cab electrics without battery draw.
• Integrated Tachometer Connection: Equipped with a dedicated terminal interface to provide clean pulsed signals to drive dashboard tachometers and operating hour meters accurately.
• Internal Solid-State Regulator: Built-in sealed regulator maintains steady charging voltage under fluctuating load conditions, safeguarding tractor electronics and extending battery life.
• Supplied Less Pulley: Facilitates exact reuse of the original equipment drive pulley, guaranteeing precise belt alignment and preserving the factory-designed drive ratio.
• Direct-Fit 3-Hole Bracket Configuration: Features 3 mounting points (including 1 threaded adjustment hole) and an M6 battery stud matching original bracket layouts on Landini, Massey Ferguson, and Perkins engines.

Technical Specifications

OEM & Aftermarket Cross Reference Table

Manufacturer / Brand	Interchangeable Reference Numbers
Massey Ferguson	1475922M92, 3519406M91
Perkins Engines	2871A142, 2871A148, 2871A163
Additional OEM Reference	185046360
Lucas / Aftermarket Reference	LR150189

Installation Advice & Workshop Notes: Always disconnect the negative battery lead before installing the new unit. Carefully transfer the existing pulley from the old alternator, verifying the keyway condition and tightening the shaft retaining nut to the recommended factory torque setting. Secure the main B+ positive lead to the M6 stud, connect the CPA0008 plug firmly, and connect the tachometer lead to restore tachometer operation. Verify belt alignment and adjust V-belt tension to manufacturer specifications to avoid excessive side load on the front bearing.