ECM Controllers & Monitors

386-3457 18-32V Operator Monitor for Cat 320D 336D 349D

Q: What numbers are documented for 386-3457?

Primary Cat Part Number: 386-3457. Same-number Formatting Variant: 3863457. Manufacturer-listed Reman Alternative: 20R-9083. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 386-3457 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.

386-3457 18-32V Operator Monitor for Cat 320D 336D 349D, OEM/reference 386-3457, Operator Monitor, product view 1

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OEM / reference386-3457

SpecificationOperator Monitor

Catalog ID51135640

Product Type: Operator Monitor
Operating Voltage: 18-32 V
Housing: ABS monitor casing
Connections: Pigtail, two 12-pin connectors and RCA jack
Condition: New replacement component

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Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.

Quotation details: MOQ, availability, lead time, item condition (new or remanufactured) and warranty coverage must be confirmed in your quotation before ordering.

Part-number relationships

Relationship	Reference family	Number
Primary Cat Part Number	Official operator-monitor identity	386-3457
Same-number Formatting Variant	Search alias only	3863457
Manufacturer-listed Reman Alternative	Cat Reman operator monitor	20R-9083

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

386-3457

Formatting alias

3863457

Remanufactured number

20R-9083

Formatting aliases are the same number written differently. Cross-references require a specification and fitment check; they do not by themselves confirm direct interchangeability. Related assemblies and remanufactured numbers are separate relationship types.

Product summary

Operator Monitor

Category: ECM Controllers & Monitors
Catalog ID: 51135640
Photo views: 4

Before ordering

Confirm these details

Match the complete part number on the original component label.
Compare the front layout and visible configuration with the product photos.
Compare connector count, connector shape and keying before installation.
Confirm the exact machine model and serial range before ordering.

Machine fitment

Compatible model references

3 model references

Popular Cat excavators: 320D / 324D / 325D / 329D / 330D / 336D / 345D / 349D
Additional official excavators: 311D LRR / 312D / 312D2 / 313D / 315D / 318D / 319D / 323D / 326D / 328D / 340D / 365C / 374D / 385C / 390D families
Other official equipment: M330D wheeled excavator; 385C front shovel; M325D material handlers; 3512 generator set

Fitment / evidence notes

Fitment limitation: Confirm 386-3457, 18-32 V range, front controls, pigtail, connector layout and machine serial before shipment

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 386-3457

Which machines use 386-3457?

Recorded compatible model references include Popular Cat excavators: 320D / 324D / 325D / 329D / 330D / 336D / 345D / 349D, Additional official excavators: 311D LRR / 312D / 312D2 / 313D / 315D / 318D / 319D / 323D / 326D / 328D / 340D / 365C / 374D / 385C / 390D families, Other official equipment: M330D wheeled excavator; 385C front shovel; M325D material handlers; 3512 generator set. Recorded fitment/evidence notes: Fitment limitation: Confirm 386-3457, 18-32 V range, front controls, pigtail, connector layout and machine serial before shipment. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 386-3457?

Formatting aliases for the same number: 3863457. Remanufactured references: 20R-9083.

How do I confirm 386-3457 before ordering?

Match the complete part number on the original component label. Compare the front layout and visible configuration with the product photos. Compare connector count, connector shape and keying before installation. 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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