Length: 1,470 mm
Specification: DN6;-4;19.2Mpa
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. 56

7I-0184

Installation route: 分配阀下~分配阀下

Length: 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. 29

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. 53

103-1348

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

Length: 1,470 mm
Specification: DN6;-4;19.2Mpa
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-6349

Installation route: 分配阀上~阀块(分配阀前)

Length: 1,000 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. 29

7I-0181

Installation route: 分配阀上~分配阀上

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. 7

7I-0924

Installation route: 分配阀下~分配阀前

Length: 500 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. 62

103-1434

Installation route: 分配阀上~分配阀上

Length: 1,200 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. 4

137-6451

Installation route: 分配阀前~回转马达

Length: 2,100 mm
Specification: DN10;1SN-6;15.7Mpa
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. 62

103-1434

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

Length: 1,200 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. 3

7I-0178

Installation route: 分配阀~进回油阀

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. 31

7I-0172

Installation route: 分配阀上~

Length: 2,100 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. 54

7I-0196

Installation route: 分配阀上~分配阀下

Length: 730 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

108-7228

Installation route: 分配阀上~手动阀(液压油箱旁)

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. 18

7I-0924

Installation route: 分配阀前~分配阀下

Length: 500 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. 31

7I-0172

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

Length: 2,100 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. 54

7I-0196

Installation route: 分配阀上~

Length: 730 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. 37

103-1431

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

Length: 1,350 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. 56

7I-0184

Installation route: 分配阀下~

Length: 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. 5

7I-7527

Installation route: 分配阀上~手动阀(分配阀前)

Length: 500 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. 57

103-1457

Installation route: 分配阀前~

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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Diagram Pipe No. 10

7I-0912

Installation route: 分配阀右~回转马达

Length: 500 mm
Specification: DN13;-8;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. 28

7I-7431

Installation route: 分配阀前~铁管(回转马达右)

Length: 450 mm
Specification: DN19;4SP-12;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. 60

7I-0942

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

Length: 1,000 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. 9

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. 57

108-7153

Installation route: 分配阀前~

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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Diagram Pipe No. 37

108-7157

Installation route: 分配阀前~

Length: 1,450 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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Diagram Pipe No. 32

7I-1335

Installation route: 分配阀后~

Length: 915 mm
Specification: DN19;4SP-12;35Mpa
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. 10

127-5856

Installation route: 分配阀前~分配阀下

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. 8

7I-7431

Installation route: 分配阀前~铁管(分配阀前)

Length: 450 mm
Specification: DN19;4SP-12;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. 63

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. 33

103-1428

Installation route: 分配阀前~

Length: 1,800 mm
Specification: DN6;-4;19.2Mpa
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. 14

111-6710

Installation route: 分配阀前~分配阀前

Length: 740 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: 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 Control Valve?

There are 22 published records. 22 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 Control Valve?

Based on published records with valid lengths, the range is 500–3,200 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312-A Control Valve?

The most frequent raw specifications in the current published records are: DN10;-6;10.3Mpa (14 records), DN6;-4;10.3Mpa (5 records), DN6;-4;19.2Mpa (2 records), DN10;1SN-6;15.7Mpa (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®312-A Control Valve?

Each record keeps the left and right fitting descriptions separate. Current examples: 4I-3778: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 7I-0930: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 4I-3778: 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®312-A Control Valve hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 11 (4I-3778), Pipe No. 3 (7I-0930), Pipe No. 8 (4I-3778), Pipe No. 53 (103-1348). Open a record to compare its installation position with the linked manual page.