Hydraulic line repair data

Caterpillar CAT®311B Attachments Hose List

Coverage details

Hoses: 10 records
Full specifications: 10 records
Systems: 1 systems
Length range: 400–2,950 mm

Current system

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Hose repair details

Hose Length and Fitting List

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. 13

4I-1845

Installation route: 过渡阀块(分配阀左前)~手动阀(连分配阀)

Length: 400 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

127-6859

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,550 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. 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. 11

4I-6233

Installation route: 踏板(附加装置)~分配阀下

Length: 2,650 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. 19

111-1055

Installation route: 右踏板~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. 6

124-1154

Installation route: 液压油散热器~单向阀(分配阀后)

Length: 969 mm
Specification: DN25;1SN-16;7Mpa
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

4I-5556

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,550 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. 15

4I-1413

Installation route: 踏板(附加装置)~手动阀(连分配阀)

Length: 2,530 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. 10

4I-6242

Installation route: 踏板(附加装置)~分配阀上

Length: 2,950 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. 2

7I-8306

Installation route: 手动阀(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. 3

102-1130

Installation route: 过渡阀块(回转接头右)~过渡阀块(回转接头前)

Length: 458 mm
Specification: DN16;1SN-10;10.5Mpa
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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Diagram Pipe No. 1

139-1762

Installation route: 推土铲铁管~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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Diagram Pipe No. 38

139-1811

Installation route: 铁管(回转马达右)~铁管(分配阀后)

Length: 563 mm
Specification: DN19;1SN-12;8.7Mpa
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. 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. 11

128-7465

Installation route: 右踏板~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. 34

139-1803

Installation route: 液压油散热器~铁管(分配阀后)

Length: 550 mm
Specification: DN25;1SN-16;7Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°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. 9

128-7463

Installation route: 右踏板~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. 10

128-7464

Installation route: 右踏板~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. 5

123-2689

Installation route: 液压油散热器~单向阀(分配阀后)

Length: 692 mm
Specification: DN25;1SN-16;7Mpa
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

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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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®311B Attachments?

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 Caterpillar CAT®311B Attachments?

Based on published records with valid lengths, the range is 400–2,950 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®311B Attachments?

The most frequent raw specifications in the current published records are: DN10;-6;10.3Mpa (5 records), DN19;4SP-12;35Mpa (1 records), DN19;6SH-12;42Mpa (1 records), DN25;1SN-16;7Mpa (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®311B Attachments?

Each record keeps the left and right fitting descriptions separate. Current examples: 132-1576: left American female thread, flat-face seal; right American female thread, flat-face seal; 4I-1845: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 127-6859: 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®311B Attachments hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 6 (132-1576), Pipe No. 13 (4I-1845), Pipe No. 3 (127-6859), Pipe No. 5 (132-1572). Open a record to compare its installation position with the linked manual page.