engine Part 28V 70A Alternator JFZ2703 C4930794 C5315004 3972529 C4946255

Applicable models:DONG FENG CUMMINS 6CT

Reference part number: JFZ2703 C4930794 C5315004 3972529 C4946255

Product Attributes

Rated output :	28V 70A
Pulley :	8PK
Size :	241817 cm single unit inner box
Weight :	net weight：7KG
Packaging :	Neutral kraft paper packaging
Spot/Pre sale :	Spot goods
Warranty :	1 year
Product number :

Product Details

Type :	AIternator
Specification :	28V 70A
Pulley :	8PK
Brand :	nuojin
Number :	JFZ2703 C4930794
Quality :	new
Delivery time :	10DAY

JFZ2703 C4930794 C5315004 3972529 C4946255

Number of grooves: 8PK (8-groove multi‑rib pulley)

Voltage / Amperage: 28V / 70A

Applicable Models: Dongfeng Tianlong, Dalianshen, Violet and other heavy-duty trucks

Engine: Cummins 6BT, 6CT series diesel engines

OE Part Number: C3972529

Product Details:

Genuine Dongfeng Electric alternator, Model JFZ2703

Built-in voltage regulator, with original matching rectifier bridge and bearings

Rotation Direction: Clockwise (CW)

No-load speed: 1200r/min; output ≥58A at 2500r/min, output ≥70A at 6000r/min (hot state)

Starter vs Alternator: How Cranking and Charging Systems Work Together

The difference between the starter and alternator, how cranking and charging share the battery, and why both must stay healthy for a reliable vehicle.....

Starter Motors for Diesel Engines: Torque and Build Differences

Why diesel engines need stronger starters: higher compression, 24 V systems, and gear reduction, plus what to check when specifying one.....

Starter Motor Carbon Brushes and Commutator: Wear and Service

How starter motor carbon brushes and the commutator wear together, the signs of poor contact, and the service steps that restore cranking.....

Starter Motor Armature: Build, Testing, and Typical Faults

How a starter armature is built, the faults that end its life, and the bench tests that decide whether a starter is worth rebuilding at all.....

Rebuilding a Starter Motor: Inspection and Component Replacement Steps

A field guide to rebuilding a starter motor: inspection order, which parts to replace, and the checks that decide whether a unit is worth overhauling.....

How a Starter Motor Works: Internal Parts and the Cranking Cycle

How a starter motor turns battery power into engine cranking, covering the armature, solenoid, pinion gear, and the bendix one-way clutch.....