Hydraulic line repair data

Caterpillar CAT®312C L Swivel Joint Hose List

Coverage details

Hoses: 2 records
Full specifications: 2 records
Systems: 1 systems
Length range: 1,900–2,550 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 20

179-7778

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 1,900 mm
Specification: DN13;-8;10.3Mpa
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. 31

194-0322

Installation route: 回转接头~电磁阀

Length: 2,550 mm
Specification: DN10;1SN-06;18MPa
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. 2

7Y-3758

Installation route: 回转接头~分配阀前(规格2)

Length: 776 mm
Specification: DN19;4SP-12;35Mpa
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. 44

194-0318

Installation route: 回转接头~回转马达(回油)

Length: 720 mm
Specification: DN13;1SN-8;10.4Mpa
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. 7

187-6904

Installation route: 回转接头~液压油箱

Length: 1,800 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. 43

179-7582

Installation route: 回转接头~分配阀前(规格1)

Length: 860 mm
Specification: DN19;4SP-12;35Mpa
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. 11

187-7002

Installation route: 回转接头~控制阀(回转接头右)

Length: 580 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: 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

187-6907

Installation route: 回转接头~回油铁管

Length: 1,100 mm
Specification: DN19;1SN-12;8.7Mpa
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. 12

187-7005

Installation route: 回转接头~控制阀(回转接头右)

Length: 350 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. 21

179-7779

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 2,250 mm
Specification: DN6;-4;10.3Mpa
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. 19

7I-1303

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 1,700 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: 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. 44

199-1802

Installation route: 回转接头~分配阀前(规格1)

Length: 700 mm
Specification: DN10;4SP-6;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. 3

121-6407

Installation route: 回转接头~分配阀前(规格3)

Length: 960 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: 45°美制内螺纹平面密封

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Diagram Pipe No. 45

199-1954

Installation route: 回转接头~液压油过滤器

Length: 2,000 mm
Specification: DN13;1SN-8;10.4Mpa
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®312C L Swivel Joint?

There are 2 published records. 2 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®312C L Swivel Joint?

Based on published records with valid lengths, the range is 1,900–2,550 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312C L Swivel Joint?

The most frequent raw specifications in the current published records are: DN10;1SN-06;18MPa (1 records), DN13;-8;10.3Mpa (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®312C L Swivel Joint?

Each record keeps the left and right fitting descriptions separate. Current examples: 179-7778: left American female thread, flat-face seal; right American female thread, flat-face seal; 194-0322: left American female thread, flat-face seal; right 90° elbow, 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®312C L Swivel Joint hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 20 (179-7778), Pipe No. 31 (194-0322). Open a record to compare its installation position with the linked manual page.