Alternator 12738 / 12738N – 12V 85A | High-Quality Replacement for Caterpillar, Perkins, JCB, Land Rover, Volvo, Genie, JLG

This 12V 85A Delco alternator (12738 / 12738N) is a premium replacement unit engineered to meet or exceed OEM performance for a wide range of industrial, construction, agricultural, and power-generation equipment. Built with an internal fan and internal regulator, it delivers stable charging output, excellent durability, and direct bolt-on compatibility.

The unit replaces an extensive list of OEM alternators from Caterpillar, Delco, Denso, JCB, Land Rover, Lucas, Magneti Marelli, and Perkins, making it one of the most widely used alternators for compact diesel engines such as CAT 3013C, 3024C, 3054C, and Perkins 403 / 404 Series.

✅ Interchange Part Numbers (Fully Organized & Complete)

Direct Numbers

• 12738, 12738N

Caterpillar

• 225-3141

• 225-3143

• 305-3661

• 394-3494

• 394-3496

• 3943496

Delco / Delco Remy

• 8600566

• 8600567

Denso

• 102211-8160

• 102211-8170

• 102211-8180

• DAN653

JCB

• 714/32200

• 71432200

• 71440152

• 71440153

• 71440154

Land Rover

• YLE10118

Lucas

• 24479

• 24480

• 24481

Marelli / Magneti Marelli

• 063377460010

• 063377461010

• 63377460

• 63377461

• 63377462

• MAN7460

• MAN7461

• MAN7462

Original Reference

• 29604/3

Perkins

• 185046500

• 185046501

• 185046522

• 2871A300

• 2871A301

• 2871A302

• 2871A303

• 2871A306

• 2871A308

• 3943494

• T414270

• TPN758

• TPN771

• U85046501

• U85046501T

✅ Specifications

• Item Description: Alternator

• Unit Type: Delco

• Voltage: 12V

• Amperage: 85A

• Fan: Internal

• Regulator: Internal

• Pulley Type: Solid, 1 Groove

• Pulley OD: 2.874 in (73 mm)

• Mounting:

• Ear 1 Hole: M8-1.25 (Threaded), 17.3 mm thick

• Ear 2 Hole: 8.7 mm (Unthreaded), 13.8 mm thick

• Ear 3 Hole: 8.4 mm (Unthreaded), 20 mm thick

• Terminals:

• B+: M6-1.0

• D+: M5-0.8

• W : M5-0.8

• Polarity: Negative

• Weight: 10.6 lbs / 4.82 kg

✅ Fits Engines

Caterpillar Engines

3013C, 3024C, 3054C
C1.5, C1.7, C2.2
XQ35, XQP60, XQP100, XQP150

Perkins Engines (403 & 404 Series)

403A-15, 403D-11, 403D-15, 403D-15T
403D-17, 403F-15, 403F-15T
404A-22, 404D-15, 404D-22, 404D-22T
404F-22, 404F-22T

✅ Fits Equipment

Caterpillar Equipment

• Skid Steers:
  216B, 216B3, 226B, 226B3, 226D3
  232B, 232D, 232D3
  239D, 239D3
  242B, 242B2
  247B, 247B3
  249D, 249D3
  257B, 257B2

• Mini Excavators & Compact Machines:
  301.5, 301.6, 301.7CR, 301.8
  302CR, 302.7CR
  303CR, 303.5CR
  304CR, 305CR
  305.5CR, 305.5GC
  901

• Compactors / Rollers:
  CB22, CB22B
  CB24, CB24B, CB24B-XT
  CB32, CB32B
  CB34, CB34B, CB34B-XW
  CB36B
  CB2.5, CB2.5GC
  CB2.7, CB2.9
  CB214E, CB224E, CB225E
  CB334E, CB334E-XW
  CC24, CC24B
  CC34, CC34B
  CC2.6, CC2.7

• Pavers / Other Machines:
  AP255E
  BB621C

FG Wilson – Generator Sets

Genie – Material Lifts / Aerial Equipment

JLG – Lift & Access Equipment

Volvo Skid Steers

MC60C, MC70C, MC85C, MC95C
MC100C, MC105C
MCT70C, MCT85C, MCT95C

 ITEM DESCRIPTION: ALTERNATOR
UNIT TYPE: DELCO
VOLTAGE: 12
AMPERAGE: 85
FAN: INTERNAL
REGULATOR: INTERNAL
SERPENTINE GROOVES OD
GROOVES: 1
PULLEY TYPE: SOLID
PULLEY OD: 2.874IN / 73MM
MOUNTING EAR 1 HOLE: M8-1.25 THREADED
MOUNTING EAR 2 HOLE: 8.7MM UNTHREADED
MOUNTING EAR 3 HOLE: 8.4MM UNTHREADED
MOUNTING EAR 1 THICKNESS: 0.681IN / 17.3MM
MOUNTING EAR 2 THICKNESS: 0.543IN / 13.8MM
MOUNTING EAR 3 THICKNESS: 0.787IN / 20MM
B+ TERMINAL: M6-1.0
D+ TERMINAL: M5-0.8
W TERMINAL: M5-0.8
POLARITY: NEGATIVE
WEIGHT: 10.6 LBS / 4.82 KG