Hydraulic line repair data

Caterpillar CAT®311B Hose Repair Data

Coverage details

Hoses: 39 records
Full specifications: 39 records
Systems: 8 systems
Length range: 400–3,200 mm

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Control ValveAttachmentsBoom AssemblyHydraulic PumpControl LeverSwivel Joint

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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. 2

7I-0178

Installation route: 蓄能器电磁阀(液压油箱后)~液压泵吸油铁管

Length: 3,200 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

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

123-2636

Installation route: 大臂油缸

Length: 760 mm
Specification: DN16;6SH-10;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. 19

6I-6755

Installation route: 液压泵上~蓄能器电磁阀(液压油箱后)

Length: 700 mm
Specification: DN6;-4;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

5I-8603

Installation route: 分配阀上~手动阀(连分配阀)

Length: 900 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

4I-1095

Installation route: 回转接头~分配阀前

Length: 775 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. 27

129-6109

Installation route: 分配阀下~蓄能器电磁阀(液压油箱后)

Length: 1,800 mm
Specification: DN6;-4;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. 4

123-2735

Installation route: 小臂左3

Length: 950 mm
Specification: DN16;6SH-10;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. 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. 7

123-2636

Installation route: 液压泵前~铁管(液压泵右)

Length: 760 mm
Specification: DN16;6SH-10;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. 38

7I-0181

Installation route: 分配阀上~分配阀下

Length: 1,250 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. 19

4I-1419

Installation route: 后中转接头~分配阀上

Length: 2,360 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-0187

Installation route: 前中转接头~后中转接头

Length: 1,050 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. 23

123-2636

Installation route: 液压泵前~手动阀(液压泵下)

Length: 760 mm
Specification: DN16;6SH-10;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. 21

4I-1410

Installation route: 后中转接头~分配阀下

Length: 1,590 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. 5

4I-1419

Installation route: 过渡接头(大臂油锁止阀)~蓄能器电磁阀(液压油箱后)

Length: 2,360 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

124-0841

Installation route: 铲斗油缸左(长臂)

Length: 1,500 mm
Specification: DN16;6SH-10;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. 1

124-0868

Installation route: 大臂油缸

Length: 722 mm
Specification: DN16;1SN-10;10.5Mpa
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. 7

5I-3139

Installation route: 分配阀下~蓄能器电磁阀(液压油箱后)

Length: 1,700 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. 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. 7

122-5218

Installation route: 分配阀左~回转马达

Length: 800 mm
Specification: DN19;1SN-12;8.7Mpa
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. 2

7Y-7904

Installation route: 回转接头~分配阀前

Length: 820 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. 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. 42

108-7237

Installation route: 分配阀前~蓄能器电磁阀(液压油箱后)

Length: 1,950 mm
Specification: DN6;-4;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. 8

146-7060

Installation route: 小臂左4

Length: 940 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. 5

123-2744

Installation route: 小臂油缸

Length: 680 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. 20

129-6078

Installation route: 小臂左1

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. 60

108-7285

Installation route: 分配阀上~分配阀下

Length: 440 mm
Specification: DN6;-4;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

5I-3124

Installation route: 分配阀上~过渡阀块(分配阀左前)

Length: 700 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. 21

139-1796

Installation route: 小臂左2

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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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 Caterpillar CAT®311B?

The current published data covers 8 systems and 39 hose records. Systems with more listed records include: Control Valve (10 hoses), Attachments (10 hoses), Boom Assembly (8 hoses), Hydraulic Pump (4 hoses), Control Lever (3 hoses), Swivel Joint (2 hoses).

What is the hose length range for Caterpillar CAT®311B?

Based on published records with valid lengths, the range is 400–3,200 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?

The most frequent raw specifications in the current published records are: DN10;-6;10.3Mpa (15 records), DN16;6SH-10;42Mpa (6 records), DN19;4SP-12;35Mpa (5 records), DN6;-4;10.3Mpa (5 records), DN19;6SH-12;42Mpa (3 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?

Each record keeps the left and right fitting descriptions separate. Current examples: 7I-0178: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 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. Open the exact part-number or pipe-number record; do not swap ends based on appearance alone.

Can I locate a Caterpillar CAT®311B hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 2 (7I-0178), Pipe No. 6 (132-1576), Pipe No. 13 (4I-1845), Pipe No. 3 (123-2636). Open a record to compare its installation position with the linked manual page.

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I am checking hydraulic hose repair information for "Caterpillar CAT®311B 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/caterpillar/cat-174-311b--43415426233137343b33313142/

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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Hose Length and Fitting List

Common Repair Questions

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