Hydraulic line repair data

Hitachi EX120-5 Boom Assembly Hose List

Hitachi EX120-5 Boom Assembly currently has 10 published hose records for checking length, hose specification, left and right fittings, part number, and diagram pipe number.

Hoses: 10 records
Full specifications: 10 records
Systems: 1 systems
Length range: 710–1,300 mm

Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 0

4373643

Installation route: 大臂左1(偏置大臂油缸)

Length: 1,200 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: 90° light-series flangeOriginal Chinese: 90°法兰-轻型

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Diagram Pipe No. 12

4260127

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

Length: 850 mm
Specification: DN19;4SH-12;42MPa
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

4265833

Installation route: 大臂(前段)~大臂(后段)

Length: 1,300 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 16

4250056

Installation route: 铲斗油缸(前段)

Length: 1,100 mm
Specification: DN12;4SP-08;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. 17

4285799

Installation route: 铲斗油缸(后段)

Length: 750 mm
Specification: DN12;4SP-08;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. 19

4285464

Installation route: 大臂油缸

Length: 710 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 13

4260263

Installation route: 大臂(前段)~大臂(后段)

Length: 1,300 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. 13

4259322

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

Length: 850 mm
Specification: DN16;4SP-10;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

4265833

Installation route: 小臂油缸前

Length: 1,300 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 1

4373642

Installation route: 大臂左2(偏置大臂油缸)

Length: 1,200 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: 90° light-series flangeOriginal Chinese: 90°法兰-轻型

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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 EX120-5 Boom Assembly?

There are 10 published records. 10 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Hitachi EX120-5 Boom Assembly?

Based on published records with valid lengths, the range is 710–1,300 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Hitachi EX120-5 Boom Assembly?

The most frequent raw specifications in the current published records are: DN12;4SP-8;34.5Mpa (3 records), DN12;4SP-08;34.5Mpa (2 records), DN19;4SP-12;31Mpa (2 records), DN13;4SP-08;41.5MPa (1 records), DN16;4SP-10;38MPa (1 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Hitachi EX120-5 Boom Assembly?

Each record keeps the left and right fitting descriptions separate. Current examples: 4373643: left American female thread, flat-face seal; right 90° light-series flange; 4260127: left American female thread, flat-face seal; right American female thread, flat-face seal; 4265833: 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 EX120-5 Boom Assembly hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 0 (4373643), Pipe No. 12 (4260127), Pipe No. 12 (4265833), Pipe No. 16 (4250056). Open a record to compare its installation position with the linked manual page.