Hydraulic line repair data

Hitachi ZX120-3 Attachments Hose List

Hitachi ZX120-3 Attachments currently has 30 published hose records for checking length, hose specification, left and right fittings, part number, and diagram pipe number.

Hoses: 30 records
Full specifications: 30 records
Systems: 1 systems
Length range: 280–3,800 mm

Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 36

4678020

Installation route: 分配阀左~液压油箱

Length: 550 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. 37A

4452734

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

Length: 400 mm
Specification: DN6;1SN-04;22.5MPa
Left fitting: 美制内螺纹74°内锥
Right fitting: 90°美制内螺纹74°内锥

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Diagram Pipe No. 6A

4629883

Installation route: 分节大臂踏板~过渡阀块(分节大臂踏板)

Length: 3,800 mm
Specification: DN10;1SN-6;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. 46

4462428

Installation route: 回转马达~过渡阀块(推土铲)

Length: 500 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. 39

4269839

Installation route: 推土铲手柄~过渡阀块(推土铲)

Length: 800 mm
Specification: DN10;1SN-6;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. 32

9292465

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

Length: 1,850 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. 30

4626937

Installation route: 回转接头~控制阀(推土铲)

Length: 850 mm
Specification: DN12;4SP-8;41.5Mpa
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. 18

4478281

Installation route: 分配阀上~控制阀(推土铲)

Length: 500 mm
Specification: DN10;1SN-6;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

4685299

Installation route: 分配阀下~过渡阀块(推土铲)

Length: 1,950 mm
Specification: DN10;1SN-6;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. 37

9288934

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

Length: 400 mm
Specification: DN6;1SN-04;22.5MPa
Left fitting: 美制内螺纹74°内锥
Right fitting: 90°美制内螺纹74°内锥

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Diagram Pipe No. 16

4442429

Installation route: 推土铲手柄~进回油阀

Length: 450 mm
Specification: DN10;1SN-06;18MPa
Left fitting: 美制内螺纹74°内锥
Right fitting: 90°美制内螺纹74°内锥

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Diagram Pipe No. 8A

4680203

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

Length: 2,500 mm
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. 3

4480078

Installation route: 分配阀下~过渡阀块(流速切换)

Length: 300 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. 29

4677891

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

Length: 1,700 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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Diagram Pipe No. 40

4722660

Installation route: 推土铲手柄~过渡阀块(推土铲)

Length: 950 mm
Specification: DN10;1SN-6;7Mpa
Left fitting: 45°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. 40

4680636

Installation route: 推土铲手柄~过渡阀块(推土铲)

Length: 950 mm
Specification: DN10;1SN-6;7Mpa
Left fitting: 45°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. 17

4636420

Installation route: 推土铲手柄~进回油阀

Length: 600 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. 45

4480078

Installation route: 控制阀(辅助)~过渡阀块(辅助)

Length: 300 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. 9A

4680197

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

Length: 2,500 mm
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. 39

4660325

Installation route: 推土铲手柄~过渡阀块(推土铲)

Length: 800 mm
Specification: DN10;1SN-6;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. 33

4627868

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

Length: 300 mm
Specification: DN6;1SN-04;7Mpa
Left fitting: 90°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. 32A

4688121

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

Length: 1,850 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. 12

4678020

Installation route: 分配阀下~电磁阀(支腿架)

Length: 550 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. 56

4246328

Installation route: 分配阀下~过渡阀块(推土铲)

Length: 280 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. 25A

4685298

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

Length: 2,350 mm
Specification: DN10;1SN-6;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. 30A

4666247

Installation route: 回转接头~控制阀(推土铲)

Length: 900 mm
Specification: DN12;4SP-8;41.5Mpa
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. 25

9283276

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

Length: 2,350 mm
Specification: DN10;1SN-6;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. 7A

4629884

Installation route: 分节大臂踏板~过渡阀块(分节大臂踏板)

Length: 3,800 mm
Specification: DN10;1SN-6;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. 26

4685196

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

Length: 2,600 mm
Specification: DN10;1SN-6;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. 4

4437927

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

Length: 400 mm
Specification: DN13;2SN-08;27.5MPa
Left fitting: 美制内螺纹74°内锥
Right fitting: 美制内螺纹74°内锥

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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 ZX120-3 Attachments?

There are 30 published records. 30 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Hitachi ZX120-3 Attachments?

Based on published records with valid lengths, the range is 280–3,800 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Hitachi ZX120-3 Attachments?

The most frequent raw specifications in the current published records are: DN10;1SN-6;7Mpa (12 records), DN6;1SN-4;7Mpa (9 records), DN12;4SP-8;41.5Mpa (2 records), DN16;4SP-10;34.5Mpa (2 records), DN6;1SN-04;22.5MPa (2 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Hitachi ZX120-3 Attachments?

Each record keeps the left and right fitting descriptions separate. Current examples: 4678020: left 美制内螺纹37°内锥; right 美制内螺纹37°内锥; 4452734: left 美制内螺纹74°内锥; right 90°美制内螺纹74°内锥; 4629883: 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 ZX120-3 Attachments hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 36 (4678020), Pipe No. 37A (4452734), Pipe No. 6A (4629883), Pipe No. 46 (4462428). Open a record to compare its installation position with the linked manual page.