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OEM / reference4094998
SpecificationAlternator
Catalog ID50560331
Heavy-duty Prestolite-pattern alternator identified by Cummins number 4094998. Exact cross-reference records specify 24V and 55A and link the unit to Cummins 3631678 and 3964745, Prestolite 66021491/66021544 and related Perkins-numbered applications. Documented Cummins engine families include selected K19, K38, K50, L10, N14 and NH/NT855 configurations. Confirm the complete number, mounting, pulley and connector before ordering.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
Part-number relationships
Relationship
Reference family
Number
Primary Part Number
Cummins equipment number
4094998
Direct Interchange
Cummins equipment number
3631678
Direct Interchange
Cummins equipment number
3964745
Manufacturer Part Number
Prestolite manufacturer number
66021491
Manufacturer Part Number
Prestolite manufacturer number
66021544
Equipment Manufacturer Number
Perkins equipment number
OE52770
Equipment Manufacturer Number
Perkins equipment number
CV70291
Equipment Manufacturer Number
JCB equipment number
71434900
Product fitment guide
Part numbers and compatible models
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Reference numbers
Primary number
4094998
Manufacturer number
66021491
66021544
OE52770
CV70291
71434900
Direct interchange
3631678
3964745
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Alternator
Category
Excavator Alternators
Catalog ID
50560331
Photo views
5
Before ordering
Confirm these details
Confirm voltage and rated amperage against the original alternator label.
Compare mounting ears, pulley type and pulley-groove count.
Check plug shape, terminal position and regulator connection.
Verify the engine model and machine serial range before ordering.
Machine fitment
Compatible model references
4 model references
Engine family: Selected Cummins K19, K38 and K50 engines
Engine family: Selected Cummins L10, N14, NH/NT855 and G5.9 engines
Cross-reference application: Selected Perkins-numbered installations using the same confirmed alternator family
Fitment limitation: Confirm complete number, mounting, pulley, connector and engine serial range
Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.
Quick fitment answers
Common questions about 4094998
Which machines use 4094998?
Recorded compatible model references include Engine family: Selected Cummins K19, K38 and K50 engines, Engine family: Selected Cummins L10, N14, NH/NT855 and G5.9 engines, Cross-reference application: Selected Perkins-numbered installations using the same confirmed alternator family, Fitment limitation: Confirm complete number, mounting, pulley, connector and engine serial range. Confirm the complete part number and machine serial range before ordering.
Confirm voltage and rated amperage against the original alternator label. Compare mounting ears, pulley type and pulley-groove count. Check plug shape, terminal position and regulator connection. Send clear photos of the original unit and connector layout when requesting a quote.
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