Hydraulic line repair data

Caterpillar CAT®312C Hydraulic Pump Hose List

Coverage details

Hoses: 4 records
Full specifications: 4 records
Systems: 1 systems
Length range: 540–1,400 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 4

104-8950

Installation route: 液压泵~电磁阀(分配阀后下)

Length: 1,200 mm
Specification: DN10;-6;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. 6

131-9778

Installation route: 液压泵上~过渡阀块(液压油箱下)

Length: 590 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. 4

4I-1037

Installation route: 液压泵~电磁阀(分配阀后下)

Length: 1,400 mm
Specification: DN10;1SN-6;10.4Mpa
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

124-0931

Installation route: 液压泵上~过渡阀块(液压油箱下)

Length: 540 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. 40

4I-0788

Installation route: 液压泵~液压油过滤器

Length: 535 mm
Specification: DN13;1SN-8;10.4Mpa
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. 40

4I-0788

Installation route: 液压泵~液压油过滤器

Length: 535 mm
Specification: DN13;1SN-8;10.4Mpa
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

223-3257

Installation route: 液压泵上~分配阀后

Length: 930 mm
Specification: DN19;6SH-12;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. 41

199-1802

Installation route: 液压泵~电磁阀(液压泵后右)

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. 1

231-1896

Installation route: 液压泵上~分配阀后

Length: 1,050 mm
Specification: DN19;6SH-12;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

7I-1288

Installation route: 液压泵上~分配阀后

Length: 900 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. 97

199-2013

Installation route: 液压泵~液压油过滤器

Length: 960 mm
Specification: DN10;1SN-6;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. 1

107-1478

Installation route: 液压泵上~分配阀后

Length: 990 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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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 Hydraulic Pump?

There are 4 published records. 4 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®312C Hydraulic Pump?

Based on published records with valid lengths, the range is 540–1,400 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312C Hydraulic Pump?

The most frequent raw specifications in the current published records are: DN10;-6;10.3Mpa (1 records), DN10;1SN-6;10.4Mpa (1 records), DN19;4SP-12;35Mpa (1 records), DN19;6SH-12;42Mpa (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 Hydraulic Pump?

Each record keeps the left and right fitting descriptions separate. Current examples: 104-8950: left American female thread, flat-face seal; right American female thread, flat-face seal; 131-9778: left American female thread, flat-face seal; right American female thread, flat-face seal; 4I-1037: 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®312C Hydraulic Pump hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 4 (104-8950), Pipe No. 6 (131-9778), Pipe No. 4 (4I-1037), Pipe No. 5 (124-0931). Open a record to compare its installation position with the linked manual page.