Individual hose record

4685391 Hose Repair Specifications

Excavator · Hitachi · ZX120-3 · Attachments

Finished length2,200 mm

Repair specifications

Part number
4685391
Diagram pipe number
24A
Installation route
大臂(辅助)~回油铁管(液压油箱)
Hose specification
DN19;1SN-12;7MPa
Finished length
2,200 mm
Working pressure
7 MPa
Left fitting
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Quantity
1

Same system

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Installation route: 大臂(分节大臂)~控制阀(分节大臂)

Length
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Specification
DN16;4SP-10;34.5Mpa
Left fitting
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
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Diagram Pipe No. 18

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Installation route: 先导泵~控制阀(辅助)

Length
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Specification
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Left fitting
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting
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Diagram Pipe No. 18

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Installation route: 控制阀(推土铲)~过渡阀块(控制阀(推土铲))

Length
1,150 mm
Specification
DN12;2SN-8;20.5MPa
Left fitting
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Right fitting
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
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Diagram Pipe No. 18

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Installation route: 控制阀(推土铲)~过渡阀块(控制阀(推土铲))

Length
1,150 mm
Specification
DN12;2SN-8;20.5MPa
Left fitting
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Right fitting
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
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Diagram Pipe No. 39A

4688123

Installation route: 过渡阀块(控制阀(分节大臂))~中转接头

Length
2,200 mm
Specification
DN10;1SN-6;7Mpa
Left fitting
美制内螺纹37°内锥
Right fitting
90°美制内螺纹37°内锥
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Diagram Pipe No. 38A

4697424

Installation route: 回转马达~过渡阀块(分节大臂)

Length
2,250 mm
Specification
DN10;1SN-6;7Mpa
Left fitting
美制内螺纹37°内锥
Right fitting
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Diagram Pipe No. 56A

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Installation route: 控制阀(辅助)~回油铁管(分配阀)

Length
2,050 mm
Specification
DN10;1SN-6;7Mpa
Left fitting
美制内螺纹37°内锥
Right fitting
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Diagram Pipe No. 56

9293923

Installation route: 控制阀(辅助)~回油铁管(分配阀)

Length
2,050 mm
Specification
DN10;1SN-6;7Mpa
Left fitting
美制内螺纹37°内锥
Right fitting
45°美制内螺纹37°内锥
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Workshop guide

Finding the correct hydraulic hose for Hitachi ZX120-3 Attachments

Start with the machine and route

For Hitachi ZX120-3 Attachments, identify the exact model and hydraulic system on the machine first. A part number or diagram pipe number is the fastest way to narrow a replacement hose; if neither is visible, compare the installation route and the existing hose.

See all Hitachi ZX120-3 systems

Read the dimensions before cutting

Check whether a listed dimension is finished assembly length, hose-only length, or cut length. These are not interchangeable. Confirm hose specification and pressure rating, then compare both ends separately: thread, sealing seat, size, angle, and orientation.

Records to compare

  • 46853912,200 mm · DN19;1SN-12;7MPa · 大臂(辅助)~回油铁管(液压油箱)

Use the drawing as a location check

Where an installation drawing or manual figure is available, match its callout to the part number and physical route. A hydraulic circuit diagram explains connections but does not show the exact routing of a hose on the machine. Take the old hose or clear end-fitting photographs to the workshop if any dimension is missing.

For reference only. Confirm the actual hose before fabrication.

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