Excavator Starter Motors

228000-7121 12V 4.0kW 10T Starter for Cat 3126 SAE #3 Wet Clutch

Q: What numbers are documented for 228000-7121?

Primary Manufacturer Part Number: 228000-7121. Same-number Formatting Variant: 2280007121. Cataloged Denso New-Service Number: 280-8004. Cataloged Equivalent Replacement: 8200076. Cataloged Replacement Family: 228000-7120. Cataloged Aftermarket Reference: S-80218. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 228000-7121 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

228000-7121 12V 4.0kW 10T Starter for Cat 3126 SAE #3 Wet Clutch, OEM/reference 228000-7121, 12V 4.0kW 10-Tooth Heavy-Duty Starter, product view 1

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OEM / reference228000-7121

Specification12V 4.0kW 10-Tooth Heavy-Duty Starter

Catalog ID83041273

Heavy-duty starter motor identified by Denso number 228000-7121 for Caterpillar 3126 automatic-transmission applications with SAE #3 wet-clutch housing. Denso and Delco technical records agree on 12V, 4.0kW, 10 teeth and clockwise rotation. Verify housing, ground stud and transmission configuration before ordering.

Product Type: Heavy-Duty Starter Motor
Product Brand: EexcavaStart
System Voltage: 12V
Power Rating: 4.0kW
Pinion Teeth: 10
Rotation: Clockwise
Mount Type: SAE #3
Clutch / Housing: Wet-clutch application
Polarity: Grounded

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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 Manufacturer Part Number	Denso starter number	228000-7121
Same-number Formatting Variant	Compact Denso formatting	2280007121
Cataloged Denso New-Service Number	Denso application-catalog number	280-8004
Cataloged Equivalent Replacement	Delco Remy replacement number	8200076
Cataloged Replacement Family	Earlier/related Denso service number; verify housing	228000-7120
Cataloged Aftermarket Reference	Aftermarket starter family	S-80218

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

228000-7121

Formatting alias

2280007121

Other documented relationship

280-8004
8200076
228000-7120
S-80218

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

12V 4.0kW 10-Tooth Heavy-Duty Starter

Category: Excavator Starter Motors
Catalog ID: 83041273
Photo views: 7

Before ordering

Confirm these details

Confirm voltage and power rating against the original starter nameplate.
Compare mounting-hole pattern, flange position and overall body orientation.
Confirm pinion tooth count and rotation where those values are specified.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

3 model references

Engine family: Caterpillar 3126, 6.6 / 7.2 L
Vehicle / equipment family: Automatic-transmission applications using SAE #3 wet-clutch housing
Fitment limitation: Confirm full number, 12V, 10 teeth, SAE #3 housing, wet clutch and ground stud

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 228000-7121

Which machines use 228000-7121?

Recorded compatible model references include Engine family: Caterpillar 3126, 6.6 / 7.2 L, Vehicle / equipment family: Automatic-transmission applications using SAE #3 wet-clutch housing, Fitment limitation: Confirm full number, 12V, 10 teeth, SAE #3 housing, wet clutch and ground stud. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 228000-7121?

Formatting aliases for the same number: 2280007121.

How do I confirm 228000-7121 before ordering?

Confirm voltage and power rating against the original starter nameplate. Compare mounting-hole pattern, flange position and overall body orientation. Confirm pinion tooth count and rotation where those values are specified. Send clear photos of the original unit and connector layout when requesting a quote.