Excavator Hydraulic Spare Parts

457-9878 24V 3-Way Solenoid Valve for Cat 307C 308C 320D 336D Excavators

Q: What numbers are documented for 457-9878?

Primary Cat Part Number: 457-9878. Same-number Formatting Variant: 4579878. Previously Co-listed Separate Valve Group: 121-1491. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 457-9878 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.

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OEM / reference457-9878

Specification24V Hydraulic Solenoid Valve Assembly

Catalog ID53749293

Hydraulic solenoid valve assembly identified by official Cat part number 457-9878. Cat specifies a 24 V, 3-way, 2-position valve with a two-bolt flange mount and 2-pin connector with dust plug. Its compatible-model list includes 307C and 308C mini excavators plus 320D, 336D and many other excavator families. Four selected exact owned photographs show the same valve body, connector and cartridge.

Product Type: Hydraulic Solenoid Valve Assembly
Voltage: 24 V
Hydraulic Configuration: 3-way, 2-position
Mounting: Two-bolt flange
Connector: 2-pin connector with dust plug
Overall Size: 5.03 x 2.28 x 3.01 in (L x W x H)
Condition: New replacement component

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Part-number relationships

Relationship	Reference family	Number
Primary Cat Part Number	Official solenoid-valve-assembly identity	457-9878
Same-number Formatting Variant	Search alias only	4579878
Previously Co-listed Separate Valve Group	Separate Cat catalog identity; not a verified direct interchange	121-1491

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

457-9878

Formatting alias

4579878

Other documented relationship

121-1491

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

Product summary

24V Hydraulic Solenoid Valve Assembly

Category: Excavator Hydraulic Spare Parts
Catalog ID: 53749293
Photo views: 4

Before ordering

Confirm these details

Match the complete part number on the original component.
Compare connectors, mounting points and visible dimensions with the product photos.
Confirm the exact machine or engine model and serial range before ordering.

Machine fitment

Compatible model references

4 model references

Official Cat Mini Excavators: 307C / 308C
Representative Cat Excavators: 312C / 312D / 320C / 320D / 323D / 324D / 325C / 325D / 329D / 330D / 336D / 336E / 345C / 345D / 349D
Other official Cat applications: Selected wheeled excavators, material handlers, forestry equipment and generator sets listed by Cat
Fitment limitation: Confirm 457-9878, 24 V coil, connector, flange 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 457-9878

Which machines use 457-9878?

Recorded compatible model references include Official Cat Mini Excavators: 307C / 308C, Representative Cat Excavators: 312C / 312D / 320C / 320D / 323D / 324D / 325C / 325D / 329D / 330D / 336D / 336E / 345C / 345D / 349D, Other official Cat applications: Selected wheeled excavators, material handlers, forestry equipment and generator sets listed by Cat, Fitment limitation: Confirm 457-9878, 24 V coil, connector, flange and machine serial before shipment. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 457-9878?

Formatting aliases for the same number: 4579878.

How do I confirm 457-9878 before ordering?

Match the complete part number on the original component. Compare connectors, mounting points and visible dimensions with the product photos. Confirm the exact machine or engine model and serial range before ordering. 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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