Hydraulic line repair data

Hitachi ZX75US-3 Hose Repair Data

Coverage details

Hoses: 21 records
Full specifications: 21 records
Systems: 9 systems
Length range: 350–2,150 mm

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Swivel JointAttachmentsAttachments – BreakerControl LeverBoom Assembly

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Hose Length and Fitting List

Showing 36 representative records. Return to the finder for a more specific search.

Diagram Pipe No. 7

4636420

Installation route: 蓄能器~先导滤芯

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. 14

4452858

Installation route: Arm cylinder — leftOriginal Chinese: 小臂油缸左

Length: 1,120 mm
Specification: DN12;2SN-8;27.5MPa
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. 5

4252872

Installation route: 大臂(前段)~大臂(后段)

Length: 520 mm
Specification: DN19;4SP-12;38Mpa
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. 12

4474678

Installation route: 液压油箱~接头(锁止阀)

Length: 550 mm
Specification: DN10;1SN-06;18MPa
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. 3

4418939

Installation route: 回转接头~推土铲油缸

Length: 1,100 mm
Specification: DN12;2SN-8;25Mpa
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. 1

4471875

Installation route: 左手柄~接线板(手柄)

Length: 1,480 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

4677925

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 1,350 mm
Specification: DN12;4SP-8;28Mpa
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. 6

4463469

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 1,380 mm
Specification: DN13;4SP-08;41.5MPa
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. 15

4630945

Installation route: 分配阀后右~液压油箱

Length: 850 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. 15

9303371

Installation route: 分配阀后右~液压油箱

Length: 850 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. 13

4452857

Installation route: Arm cylinder — rightOriginal Chinese: 小臂油缸右

Length: 1,000 mm
Specification: DN12;2SN-8;27.5MPa
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. 16

4415081

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 1,400 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. 2

4466630

Installation route: 大臂(破碎器)~小臂(破碎器)

Length: 1,100 mm
Specification: DN10;2SN-6;28Mpa
Left fitting: 英制内螺纹30°外锥
Right fitting: 英制内螺纹30°外锥

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Diagram Pipe No. 8

4678295

Installation route: 左手柄~进回油阀

Length: 1,150 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

4451995

Installation route: 流速切换阀~过渡阀块(流速切换)

Length: 350 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. 16

4436352

Installation route: 行走推杆~进回油阀

Length: 600 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. 26

4471887

Installation route: 右手柄~过渡阀块(进回油阀)

Length: 2,150 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. 10

4129123

Installation route: Arm-cylinder grease lineOriginal Chinese: 小臂油缸黄油管

Length: 600 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. 8

4679222

Installation route: 机油管

Length: 1,610 mm
Specification: DN16;1SN-10;13Mpa
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. 9

4455438

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 1,400 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. 2

4368038

Installation route: 回转接头~推土铲油缸

Length: 1,350 mm
Specification: DN10;4SH-06;44.5MPa
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. 4

9290796

Installation route: 大臂(辅助)~控制阀(辅助)

Length: 1,750 mm
Specification: DN10;2SN-6;27.5MPa
Left fitting: 英制内螺纹30°外锥
Right fitting: 90°英制内螺纹30°外锥

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Diagram Pipe No. 6

4392171

Installation route: 偏置大臂油缸

Length: 820 mm
Specification: DN10;2SN-6;27.5MPa
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. 27

4686609

Installation route: 液压泵~分配阀(进油)

Length: 1,900 mm
Specification: DN12;4SP-8;27.5MPa
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. 15A

4684443

Installation route: 电磁阀(破碎器)~进回油阀

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. 5

4470340

Installation route: 分配阀左后~回转马达

Length: 1,000 mm
Specification: DN12;2SN-8;27.5MPa
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. 2

4651988

Installation route: 回转接头~三通(回转接头)

Length: 600 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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Diagram Pipe No. 21

4415186

Installation route: 小臂油缸

Length: 2,350 mm
Specification: DN12;4SP-8;27.5MPa
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. 4

4470348

Installation route: 分配阀左前~回转马达

Length: 1,150 mm
Specification: DN12;2SN-8;27.5MPa
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. 16

9291071

Installation route: 电磁阀(破碎器)~进回油阀

Length: 1,900 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. 15

4436298

Installation route: 行走推杆~进回油阀

Length: 600 mm
Specification: DN6;1SN-4;7Mpa
Left fitting: 90°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. 17

4377483

Installation route: Bucket cylinderOriginal Chinese: 铲斗油缸

Length: 820 mm
Specification: DN12;4SP-8;27.5MPa
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. 13A

4689067

Installation route: Arm cylinder — leftOriginal Chinese: 小臂油缸左

Length: 950 mm
Specification: DN12;4SP-8;27.5MPa
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. 6A

4684462

Installation route: 大臂(辅助)~回油铁管(分配阀)

Length: 2,400 mm
Specification: DN10;1SN-6;7Mpa
Left fitting: 英制内螺纹30°外锥
Right fitting: 90°英制内螺纹30°外锥

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Diagram Pipe No. 8

4463558

Installation route: 小臂破碎器截止阀

Length: 1,250 mm
Specification: DN19;4SP-12;34.5Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 45°美制内螺纹平面密封

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Diagram Pipe No. 16A

4684397

Installation route: 电磁阀(破碎器)~进回油阀

Length: 1,900 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.

Which systems and hoses are currently listed for Hitachi ZX75US-3?

The current published data covers 9 systems and 21 hose records. Systems with more listed records include: Swivel Joint (4 hoses), Attachments (4 hoses), Attachments – Breaker (4 hoses), Control Lever (3 hoses), Boom Assembly (2 hoses).

What is the hose length range for Hitachi ZX75US-3?

Based on published records with valid lengths, the range is 350–2,150 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Hitachi ZX75US-3?

The most frequent raw specifications in the current published records are: DN6;1SN-4;7Mpa (6 records), DN6;1SN-04;22.5MPa (3 records), DN10;1SN-06;18MPa (2 records), DN12;2SN-8;27.5MPa (2 records), DN10;1SN-6;7Mpa (1 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Hitachi ZX75US-3?

Each record keeps the left and right fitting descriptions separate. Current examples: 4636420: left 美制内螺纹37°内锥; right 90°美制内螺纹37°内锥; 4452858: left American female thread, flat-face seal; right American female thread, flat-face seal; 4252872: left American female thread, flat-face seal; right American female thread, flat-face seal. Open the exact part-number or pipe-number record; do not swap ends based on appearance alone.

Can I locate a Hitachi ZX75US-3 hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 7 (4636420), Pipe No. 14 (4452858), Pipe No. 5 (4252872), Pipe No. 12 (4474678). Open a record to compare its installation position with the linked manual page.

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I am checking hydraulic hose repair information for "Hitachi ZX75US-3 Hose Repair Data". Use web search and cite a source for every factual point. Compare this HoseSeek page with manufacturer manuals and reliable parts documentation: https://www.hoseseek.com/machines/hitachi/zx75us-3--5a58373555532d33/

Verify, where applicable:
1. Exact machine model and any serial-number range.
2. Hydraulic system and installation route.
3. Hose part number and diagram pipe number.
4. Finished length, hose specification, and pressure rating.
5. Both end fittings, including thread, sealing seat, size, and angle.
6. Installation-diagram position and routing.

State explicitly what you could not verify. Do not infer a missing dimension or fitting. End with a short on-machine checklist for a hose repair technician.

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