Excavator Engine Parts

31162121 / 738588M1 126T Flywheel Ring Gear for Perkins 1004 A6.354

Q: What numbers are documented for 31162121?

Primary Manufacturer Part Number: 31162121. Direct Cross-Reference: 738588M1. Related Flywheel Assembly - Not Interchange: 4111D128. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 31162121 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.

31162121 / 738588M1 126T Flywheel Ring Gear for Perkins 1004 A6.354, OEM/reference 31162121, 126-Tooth Flywheel Starter Ring Gear, product view 1

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OEM / reference31162121

Specification126-Tooth Flywheel Starter Ring Gear

Catalog ID51037184

126-tooth starter ring gear cross-referenced as Perkins 31162121 and Massey Ferguson 738588M1. Published dimensional records are approximately 404-404.6 mm outside diameter, 375-376.3 mm inside diameter and 17.5-17.6 mm thickness, with applications across Perkins 1004, A4.236, A4.248 and A6.354 families. Part 4111D128 is the related flywheel assembly, not a direct ring-gear interchange.

Product Type: Flywheel Starter Ring Gear
Product Brand: EexcavaStart
Tooth Count: 126
Outside Diameter: Approximately 404-404.6 mm
Inside Diameter: Approximately 375-376.3 mm
Thickness: Approximately 17.5-17.6 mm
Condition: New replacement part

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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	Starter ring gear	31162121
Direct Cross-Reference	Massey Ferguson OEM number	738588M1
Related Flywheel Assembly - Not Interchange	Assembly containing the ring gear	4111D128

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

31162121

Direct interchange

738588M1
4111D128

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

Product summary

126-Tooth Flywheel Starter Ring Gear

Category: Excavator Engine Parts
Catalog ID: 51037184
Photo views: 2

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 families: Perkins 1004 / A4.236 / A4.248 / A6.354 / T6.354
Equipment family: Selected Massey Ferguson tractors and loaders
Fitment limitation: Confirm tooth count and all three dimensions against the original flywheel

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 31162121

Which machines use 31162121?

Recorded compatible model references include Engine families: Perkins 1004 / A4.236 / A4.248 / A6.354 / T6.354, Equipment family: Selected Massey Ferguson tractors and loaders, Fitment limitation: Confirm tooth count and all three dimensions against the original flywheel. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 31162121?

Documented direct interchanges: 738588M1, 4111D128.

How do I confirm 31162121 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.

Continue comparing verified references from the same system.

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