Hydraulic line repair data

Caterpillar CAT®312-A Boom Assembly Hose List

Coverage details

Hoses: 6 records
Full specifications: 6 records
Systems: 1 systems
Length range: 730–910 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 11

7I-1371

Installation route: 大臂左3

Length: 910 mm
Specification: DN16;4SP-10;28Mpa
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. 28

122-5358

Installation route: 大臂左2

Length: 910 mm
Specification: DN19;4SP-12;28Mpa
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. 3

7I-1361

Installation route: 大臂油缸

Length: 730 mm
Specification: DN16;4SP-10;28Mpa
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

7I-0085

Installation route: 小臂油缸

Length: 770 mm
Specification: DN19;4SP-12;28Mpa
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

7I-1367

Installation route: 大臂左1/左4

Length: 910 mm
Specification: DN19;4SP-12;28Mpa
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. 7

4E-5786

Installation route: 铲斗油缸~过渡接头(铲斗油缸旁)

Length: 870 mm
Specification: DN19;4SP-12;28Mpa
Left fitting: Light-series flangeOriginal Chinese: 法兰-轻型
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

133-4646

Installation route: 铲斗油缸右(规格2)

Length: 1,150 mm
Specification: DN19;4SP-12;28Mpa
Left fitting: 90° light-series flangeOriginal Chinese: 90°法兰-轻型
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

133-4644

Installation route: 铲斗油缸右(规格1)

Length: 1,640 mm
Specification: DN19;4SP-12;28Mpa
Left fitting: 90° light-series flangeOriginal Chinese: 90°法兰-轻型
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

133-4645

Installation route: 铲斗油缸左(规格2)

Length: 1,150 mm
Specification: DN16;4SP-10;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. 1

133-5508

Installation route: 铲斗油缸左(规格3)

Length: 970 mm
Specification: DN16;4SP-10;28Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°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

133-4643

Installation route: 铲斗油缸左(规格1)

Length: 1,640 mm
Specification: DN16;4SP-10;28Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°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. 14

133-5507

Installation route: 铲斗油缸右(规格3)

Length: 970 mm
Specification: DN19;4SP-12;28Mpa
Left fitting: 90° light-series flangeOriginal Chinese: 90°法兰-轻型
Right fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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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 Caterpillar CAT®312-A Boom Assembly?

There are 6 published records. 6 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®312-A Boom Assembly?

Based on published records with valid lengths, the range is 730–910 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312-A Boom Assembly?

The most frequent raw specifications in the current published records are: DN19;4SP-12;28Mpa (4 records), DN16;4SP-10;28Mpa (2 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Caterpillar CAT®312-A Boom Assembly?

Each record keeps the left and right fitting descriptions separate. Current examples: 7I-1371: left American female thread, flat-face seal; right American female thread, flat-face seal; 122-5358: left American female thread, flat-face seal; right American female thread, flat-face seal; 7I-1361: 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 Caterpillar CAT®312-A Boom Assembly hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 11 (7I-1371), Pipe No. 28 (122-5358), Pipe No. 3 (7I-1361), Pipe No. 5 (7I-0085). Open a record to compare its installation position with the linked manual page.