Hydraulic line repair data

Caterpillar CAT®312B Attachments Hose List

Coverage details

Hoses: 7 records
Full specifications: 7 records
Systems: 1 systems
Length range: 910–2,550 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 3

146-1321

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,410 mm
Specification: DN25;6SH-16;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. 4

132-1781

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,650 mm
Specification: DN19;6SH-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. 6

132-1576

Installation route: 大臂(附加装置)~左过渡阀块(附加装置)

Length: 910 mm
Specification: DN19;4SP-12;35Mpa
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

111-1055

Installation route: 踏板~控制阀(分配阀右前)

Length: 2,550 mm
Specification: DN10;-6;10.3Mpa
Left fitting: 美制内螺纹37°锥
Right fitting: 美制内螺纹37°锥

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Diagram Pipe No. 3

146-1317

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,680 mm
Specification: DN25;6SH-16;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. 4

146-1325

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,410 mm
Specification: DN19;6SH-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. 5

132-1572

Installation route: 大臂(附加装置)~右过渡阀块(附加装置)

Length: 930 mm
Specification: DN25;4SP-16;35Mpa
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

7I-8303

Installation route: 手动阀(大臂上)~大臂铁管

Length: 600 mm
Specification: DN19;4SP-12;28Mpa
Left fitting: 45°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

128-7463

Installation route: 踏板~进回油阀

Length: 920 mm
Specification: DN10;-6;10.3Mpa
Left fitting: 90°美制内螺纹37°锥
Right fitting: 美制内螺纹37°锥

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Diagram Pipe No. 32

139-1765

Installation route: 推土铲油缸~

Length: 780 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: 45°美制内螺纹平面密封

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Diagram Pipe No. 10

128-7464

Installation route: 踏板~进回油阀

Length: 1,030 mm
Specification: DN10;-6;10.3Mpa
Left fitting: 90°美制内螺纹37°锥
Right fitting: 90°美制内螺纹37°锥

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Diagram Pipe No. 2

7I-8306

Installation route: 减压阀(大臂上)~大臂铁管

Length: 710 mm
Specification: DN19;4SP-12;28Mpa
Left fitting: 45°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. 11

128-7465

Installation route: 踏板~控制阀(分配阀右前)

Length: 2,600 mm
Specification: DN10;-6;10.3Mpa
Left fitting: 90°美制内螺纹37°锥
Right fitting: 美制内螺纹37°锥

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Diagram Pipe No. 1

139-1762

Installation route: 推土铲油缸~

Length: 760 mm
Specification: DN16;4SP-10;28Mpa
Left fitting: 45°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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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®312B Attachments?

There are 7 published records. 7 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®312B Attachments?

Based on published records with valid lengths, the range is 910–2,550 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312B Attachments?

The most frequent raw specifications in the current published records are: DN19;6SH-12;42Mpa (2 records), DN25;6SH-16;42Mpa (2 records), DN10;-6;10.3Mpa (1 records), DN19;4SP-12;35Mpa (1 records), DN25;4SP-16;35Mpa (1 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Caterpillar CAT®312B Attachments?

Each record keeps the left and right fitting descriptions separate. Current examples: 146-1321: left American female thread, flat-face seal; right American female thread, flat-face seal; 132-1781: left American female thread, flat-face seal; right American female thread, flat-face seal; 132-1576: 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®312B Attachments hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 3 (146-1321), Pipe No. 4 (132-1781), Pipe No. 6 (132-1576), Pipe No. 19 (111-1055). Open a record to compare its installation position with the linked manual page.