Hydraulic line repair data

Hitachi EX300LC-3 Hose Repair Data

Coverage details
Hoses
102 records
Full specifications
102 records
Systems
11 systems
Length range
250–3,650 mm

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Hose repair details

Hose Length and Fitting List

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

Diagram Pipe No. 14

4320220

Installation route: 过渡阀块(破碎器)~铁管(破碎器)

Length
650 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
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 17

4328984

Installation route: 电磁阀(手柄)~中转接头

Length
1,170 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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 1

4318814

Installation route: Bucket cylinderOriginal Chinese: 铲斗油缸

Length
1,650 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
90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 43

4343347

Installation route: 中转接头~电磁阀(手柄)

Length
900 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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 16

4328983

Installation route: 电磁阀(手柄)~中转接头

Length
880 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
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 68A

4323581

Installation route: 液压泵~分配阀右

Length
1,180 mm
Specification
DN10;1SN-6;14MPa
Left fitting
美制内螺纹37°内锥
Right fitting
90°美制内螺纹37°内锥
View full repair specifications

Diagram Pipe No. 39A

4325224

Installation route: 模式转换阀~中转接头

Length
740 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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 8

4325572

Installation route: 分配阀左~分配阀右

Length
420 mm
Specification
DN19;4SP-12;31Mpa
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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 35A

4325220

Installation route: 模式转换阀~中转接头

Length
350 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
View full repair specifications

Diagram Pipe No. 1

4328988

Installation route: 分配阀上~电磁阀(液压泵)

Length
1,150 mm
Specification
DN10;1SN-6;7Mpa
Left fitting
90°美制内螺纹37°内锥
Right fitting
90°美制内螺纹37°内锥
View full repair specifications

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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 22A

4313124

Installation route: 回转接头~分配阀右上

Length
1,350 mm
Specification
DN25;4SP-16;32Mpa
Left fitting
45°美制内螺纹平面密封
Right fitting
90° light-series flangeOriginal Chinese: 90°法兰-轻型
View full repair specifications

Diagram Pipe No. 16

4328610

Installation route: 分配阀左~过渡阀块(分配阀)

Length
1,700 mm
Specification
DN10;1SN-6;14MPa
Left fitting
美制内螺纹37°内锥
Right fitting
90°美制内螺纹37°内锥
View full repair specifications

Diagram Pipe No. 62A

4343350

Installation route: 液压泵~过渡阀块(分配阀)

Length
3,150 mm
Specification
DN10;1SN-6;14MPa
Left fitting
美制内螺纹37°内锥
Right fitting
90°美制内螺纹37°内锥
View full repair specifications

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
View full repair specifications

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
View full repair specifications

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
View full repair specifications

Diagram Pipe No. 24A

4313125

Installation route: 回转接头~分配阀左上

Length
1,250 mm
Specification
DN25;4SP-16;32Mpa
Left fitting
45°美制内螺纹平面密封
Right fitting
90° light-series flangeOriginal Chinese: 90°法兰-轻型
View full repair specifications

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
View full repair specifications

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
View full repair specifications

Workshop guide

Finding the correct hydraulic hose for Hitachi EX300LC-3

Start with the machine and route

For Hitachi EX300LC-3, 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.

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

  • 4320220650 mm · DN25;4SP-16;31Mpa · 过渡阀块(破碎器)~铁管(破碎器)
  • 43289841,170 mm · DN10;1SN-6;7Mpa · 电磁阀(手柄)~中转接头
  • 4345772450 mm · DN10;1SN-6;7Mpa · 中转接头~过渡阀块(行走踏板)

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.

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 102 hose records. Systems with more listed records include: Control Lever (41 hoses), Control Valve (13 hoses), Attachments – Breaker (11 hoses), Swivel Joint (9 hoses), Hydraulic Pump (8 hoses), Solenoid Valve (8 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 (39 records), DN10;1层纤维-6;14MPa (20 records), DN6;1SN-4;7Mpa (11 records), DN25;4SP-16;32Mpa (7 records), DN6;2层纤维-4;14MPa (5 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: 4320220: left American female thread, flat-face seal; right 90° elbow, American female thread, flat-face seal; 4328984: left 美制内螺纹37°内锥; right 90°美制内螺纹37°内锥; 4345772: 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 EX300LC-3 hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 14 (4320220), Pipe No. 17 (4328984), Pipe No. 20 (4345772), Pipe No. 31 (4213446). Open a record to compare its installation position with the linked manual page.

Optional cross-check

Ask an AI search tool to check this repair data

The question is already written for this machine or hose. Use a tool with web search enabled; treat its answer as a starting point and verify on the machine.

See the exact question being sent
I am checking hydraulic hose repair information for "Hitachi EX300LC-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/ex300lc-3--45583330304c432d33/

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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