Hydraulic line repair data

Hitachi EX300LC-3 Hose Repair Data

Hitachi EX300LC-3 currently has 67 published hose records for checking length, hose specification, left and right fittings, part number, and diagram pipe number.

Hoses: 67 records
Full specifications: 67 records
Systems: 11 systems
Length range: 250–3,650 mm

Hose repair details

Hose Length and Fitting List

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

Diagram Pipe No. 20

4345772

Installation route: 中转接头~过渡阀块(行走踏板)

Length: 450 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. 31

4213446

Installation route: 分配阀上~回转马达

Length: 600 mm
Specification: DN6;2层纤维-4;14MPa
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. 66A

4319383

Installation route: 液压泵~分配阀后

Length: 1,200 mm
Specification: DN6;2层纤维-4;14MPa
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. 57

4217369

Installation route: 过渡阀块(流速切换)~接线板(中转接头)

Length: 2,050 mm
Specification: DN10;1层纤维-6;14MPa
Left fitting: 90°美制内螺纹37°内锥
Right fitting: 美制外螺纹37°外锥

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Diagram Pipe No. 22

4313713

Installation route: 中转接头~回油铁管(液压油箱)

Length: 1,850 mm
Specification: DN12;1层纤维-8;10.5MPa
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. 33

4304412

Installation route: 左手柄~进回油阀

Length: 1,300 mm
Specification: DN10;1SN-06;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. 34

4287527

Installation route: 右手柄~进回油阀

Length: 1,550 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. 35

4313710

Installation route: 分配阀下~接线板(中转接头)

Length: 1,970 mm
Specification: DN10;1层纤维-6;14MPa
Left fitting: 90°美制内螺纹37°内锥
Right fitting: 美制外螺纹37°外锥

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Diagram Pipe No. 7

4218407

Installation route: 破碎器踏板~接线板(中转接头)

Length: 1,700 mm
Specification: DN10;1层纤维-6;14MPa
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. 33

4299085

Installation route: 左手柄~进回油阀

Length: 1,250 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. 25A

4325210

Installation route: 模式转换阀~接线板(中转接头)

Length: 400 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

4304411

Installation route: 左手柄~进回油阀

Length: 1,150 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

4313704

Installation route: 中转接头~分配阀上

Length: 2,180 mm
Specification: DN10;1层纤维-6;14MPa
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. 4

4226325

Installation route: 破碎器踏板~接线板(中转接头)

Length: 1,750 mm
Specification: DN10;1层纤维-6;14MPa
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. 6

4200477

Installation route: 大臂(后段)~卸压安全阀(破碎器)

Length: 700 mm
Specification: DN25;4SP-16;32Mpa
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. 26

4313702

Installation route: 中转接头~分配阀下

Length: 1,900 mm
Specification: DN10;1层纤维-6;14MPa
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. 5

4218405

Installation route: 分配阀上~接线板(中转接头)

Length: 2,350 mm
Specification: DN10;1层纤维-6;14MPa
Left fitting: 90°美制内螺纹37°内锥
Right fitting: 美制外螺纹37°外锥

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Diagram Pipe No. 21

4345773

Installation route: 中转接头~过渡阀块(行走踏板)

Length: 450 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. 11

4326026

Installation route: 小臂破碎器截止阀

Length: 2,270 mm
Specification: DN25;4SP-16;31MPa
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. 19

4281530

Installation route: 行走踏板~进回油阀

Length: 1,200 mm
Specification: DN10;1层纤维-6;14MPa
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. 11

4326027

Installation route: 小臂破碎器截止阀

Length: 1,500 mm
Specification: DN25;4SP-16;31MPa
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. 2

4332157

Installation route: 左手柄~接线板(中转接头)

Length: 1,960 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. 0

4292561

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

Length: 2,400 mm
Specification: DN25;4SP-16;32Mpa
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. 27A

4325212

Installation route: 模式转换阀~接线板(中转接头)

Length: 330 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. 8

4218404

Installation route: 分配阀下~接线板(中转接头)

Length: 1,850 mm
Specification: DN10;1层纤维-6;14MPa
Left fitting: 90°美制内螺纹37°内锥
Right fitting: 美制外螺纹37°外锥

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Diagram Pipe No. 26A

4325211

Installation route: 模式转换阀~接线板(中转接头)

Length: 480 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. 36

4328975

Installation route: 电磁阀~电磁阀(液压泵)

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. 29

4316564

Installation route: 分配阀上~回转马达

Length: 600 mm
Specification: DN10;1层纤维-6;14MPa
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. 29A

4325213

Installation route: 模式转换阀~接线板(中转接头)

Length: 740 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. 25

4283435

Installation route: 中转接头~分配阀下

Length: 2,000 mm
Specification: DN10;1层纤维-6;14MPa
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. 16

4210340

Installation route: 破碎器踏板~进回油阀

Length: 1,350 mm
Specification: DN10;1层纤维-6;14MPa
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. 30

4197724

Installation route: 液压泵~吸油铁管

Length: 750 mm
Specification: DN19;2SN-12;21.5MPa
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. 13

4210341

Installation route: 破碎器踏板~行走踏板

Length: 1,200 mm
Specification: DN10;1层纤维-6;14MPa
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

4316009

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

Length: 3,650 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. 34

4304409

Installation route: 右手柄~进回油阀

Length: 1,600 mm
Specification: DN10;1SN-06;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

4332160

Installation route: 右手柄~接线板(中转接头)

Length: 2,080 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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Narrow the selection

Control Lever33 hoses Control Valve10 hoses Attachments – Breaker9 hoses Swivel Joint3 hoses Hydraulic Pump3 hoses Hydraulic Tank2 hoses Solenoid Valve2 hoses Attachments2 hoses

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 EX300LC-3?

The current published data covers 11 systems and 67 hose records. Systems with more listed records include: Control Lever (33 hoses), Control Valve (10 hoses), Attachments – Breaker (9 hoses), Swivel Joint (3 hoses), Hydraulic Pump (3 hoses), Hydraulic Tank (2 hoses).

What is the hose length range for Hitachi EX300LC-3?

Based on published records with valid lengths, the range is 250–3,650 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Hitachi EX300LC-3?

The most frequent raw specifications in the current published records are: DN10;1SN-6;7Mpa (24 records), DN10;1层纤维-6;14MPa (20 records), DN6;2层纤维-4;14MPa (5 records), DN10;1SN-06;7Mpa (4 records), DN6;1SN-4;7Mpa (3 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Hitachi EX300LC-3?

Each record keeps the left and right fitting descriptions separate. Current examples: 4345772: left 美制内螺纹37°内锥; right 美制内螺纹37°内锥; 4213446: left 美制内螺纹37°内锥; right 90°美制内螺纹37°内锥; 4319383: left 美制内螺纹37°内锥; right 90°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 EX300LC-3 hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 20 (4345772), Pipe No. 31 (4213446), Pipe No. 66A (4319383), Pipe No. 57 (4217369). Open a record to compare its installation position with the linked manual page.

Hose Length and Fitting List

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Common Repair Questions