Hydraulic line repair data

Hitachi ZX250 Attachments Hose List

Hitachi ZX250 Attachments currently has 14 published hose records for checking length, hose specification, left and right fittings, part number, and diagram pipe number.

Hoses: 14 records
Full specifications: 14 records
Systems: 1 systems
Length range: 400–3,000 mm

Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 7

4305255

Installation route: 先导泵~控制阀(辅助)

Length: 500 mm
Specification: DN12;2SN-8;21Mpa
Left fitting: 美制内螺纹37°内锥
Right fitting: 美制内螺纹37°内锥

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Diagram Pipe No. 53

4453683

Installation route: 分配阀左~流速切换阀

Length: 850 mm
Specification: DN6;1SN-4;7Mpa
Left fitting: 美制内螺纹37°内锥
Right fitting: 美制内螺纹37°内锥

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Diagram Pipe No. 40

4402701

Installation route: 分配阀右~液压油箱

Length: 720 mm
Specification: DN6;1SN-4;7MPa
Left fitting: 美制内螺纹37°内锥
Right fitting: 美制内螺纹37°内锥

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Diagram Pipe No. 22

4452035

Installation route: 过渡阀块(辅助)~过渡阀块(辅助)

Length: 400 mm
Specification: DN6;1SN-4;7Mpa
Left fitting: 美制内螺纹37°内锥
Right fitting: 美制内螺纹37°内锥

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Diagram Pipe No. 18

4452733

Installation route: 过渡阀块(控制阀(分节油缸))~过渡阀块

Length: 450 mm
Specification: DN6;1SN-04;22.5MPa
Left fitting: 美制内螺纹74°内锥
Right fitting: 美制内螺纹74°内锥

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Diagram Pipe No. 12

4285797

Installation route: 控制阀(辅助)~慢速回流阀

Length: 650 mm
Specification: DN12;4SP-8;34.5Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 23

4452037

Installation route: 流速切换阀~过渡阀块(辅助)

Length: 850 mm
Specification: DN6;1SN-4;7Mpa
Left fitting: 美制内螺纹37°内锥
Right fitting: 美制内螺纹37°内锥

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Diagram Pipe No. 28

4462262

Installation route: 大臂(辅助)~控制阀(辅助)

Length: 3,000 mm
Specification: DN10;2SN-6;34.5MPa
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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Diagram Pipe No. 28

4462262

Installation route: 大臂(辅助)~回油铁管(液压油箱)

Length: 3,000 mm
Specification: DN10;2SN-6;34.5MPa
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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Diagram Pipe No. 7

4285795

Installation route: 先导泵~控制阀(辅助)

Length: 500 mm
Specification: DN12;4SP-8;34.5Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 33

4452733

Installation route: 过渡阀块(辅助)~过渡阀块

Length: 450 mm
Specification: DN6;1SN-04;22.5MPa
Left fitting: 美制内螺纹74°内锥
Right fitting: 美制内螺纹74°内锥

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Diagram Pipe No. 15

4366894

Installation route: 控制阀(辅助)~电磁阀(辅助)

Length: 830 mm
Specification: DN6;1SN-4;7Mpa
Left fitting: 美制内螺纹37°内锥
Right fitting: 美制内螺纹37°内锥

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Diagram Pipe No. 11

4383513

Installation route: 分配阀后~慢速回流阀

Length: 1,350 mm
Specification: DN10;2SN-6;34.5MPa
Left fitting: 美制内螺纹37°内锥
Right fitting: 美制内螺纹37°内锥

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Diagram Pipe No. 8

4448853

Installation route: 分配阀左~电磁阀

Length: 1,050 mm
Specification: DN6;1SN-4;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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Based on current published data

Common Repair Questions

Questions appear only when a published record or linked PDF page provides the answer.

How many hoses are currently listed for Hitachi ZX250 Attachments?

There are 14 published records. 14 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Hitachi ZX250 Attachments?

Based on published records with valid lengths, the range is 400–3,000 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Hitachi ZX250 Attachments?

The most frequent raw specifications in the current published records are: DN6;1SN-4;7Mpa (6 records), DN10;2SN-6;34.5MPa (3 records), DN12;4SP-8;34.5Mpa (2 records), DN6;1SN-04;22.5MPa (2 records), DN12;2SN-8;21Mpa (1 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Hitachi ZX250 Attachments?

Each record keeps the left and right fitting descriptions separate. Current examples: 4305255: left 美制内螺纹37°内锥; right 美制内螺纹37°内锥; 4453683: left 美制内螺纹37°内锥; right 美制内螺纹37°内锥; 4402701: left 美制内螺纹37°内锥; right 美制内螺纹37°内锥. Open the exact part-number or pipe-number record; do not swap ends based on appearance alone.

Can I locate a Hitachi ZX250 Attachments hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 7 (4305255), Pipe No. 53 (4453683), Pipe No. 40 (4402701), Pipe No. 22 (4452035). Open a record to compare its installation position with the linked manual page.