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. 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. 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. 45

4I-6245

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

Length: 2,400 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. 56

108-7228

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

Length: 1,850 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. 22

139-1803

Installation route: 分配阀后~液压油散热器

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. 19

115-8600

Installation route: 分配阀后~铁管(液压油箱后)

Length: 590 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: 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. 30

7I-0193

Installation route: 分配阀上~分配阀上

Length: 450 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. 9

127-5856

Installation route: 分配阀下~分配阀前

Length: 850 mm
Specification: DN16;6SH-10;42Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°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. 2

169-7924

Installation route: 分配阀前~回转马达

Length: 820 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. 17

4I-6352

Installation route: 分配阀下~手动阀(连分配阀)

Length: 900 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. 18

115-8600

Installation route: 分配阀后~铁管(液压泵下)

Length: 590 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: 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. 6

139-1759

Installation route: 分配阀前~控制阀(分配阀右)

Length: 607 mm
Specification: DN19;1SN-12;8.7Mpa
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. 48

4I-1428

Installation route: 分配阀上~分配阀下

Length: 1,390 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

169-7921

Installation route: 分配阀前~回转马达

Length: 780 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: 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. 8

4I-1434

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

Length: 1,780 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. 55

5I-4010

Installation route: 分配阀下~分配阀下

Length: 400 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. 40

4I-7675

Installation route: 分配阀上~分配阀下

Length: 800 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

135-8350

Installation route: 分配阀~蓄能器电磁阀(液压油箱后)

Length: 2,150 mm
Specification: DN6;-4;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. 71

108-7141

Installation route: 分配阀上~分配阀下

Length: 550 mm
Specification: DN6;-4;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. 6

146-7057

Installation route: 分配阀前~分配阀前

Length: 730 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: 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. 54

128-7560

Installation route: 分配阀下~液压泵吸油铁管

Length: 1,450 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. 11

108-7141

Installation route: 分配阀前~手动阀(连分配阀)

Length: 550 mm
Specification: DN6;-4;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. 15

139-1811

Installation route: 分配阀后~铁管(回转马达右)

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. 51

108-7153

Installation route: 分配阀上~分配阀下

Length: 450 mm
Specification: DN6;-4;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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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 Control Valve?

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 Control Valve?

Based on published records with valid lengths, the range is 440–2,400 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 Control Valve?

The most frequent raw specifications in the current published records are: DN10;-6;10.3Mpa (5 records), DN6;-4;10.3Mpa (4 records), DN19;1SN-12;8.7Mpa (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 Control Valve?

Each record keeps the left and right fitting descriptions separate. Current examples: 5I-8603: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 129-6109: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 7I-0181: 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 Control Valve hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 10 (5I-8603), Pipe No. 27 (129-6109), Pipe No. 38 (7I-0181), Pipe No. 7 (5I-3139). Open a record to compare its installation position with the linked manual page.