Hydraulic line repair data

Caterpillar CAT®312D L Hydraulic Pump Hose List

Coverage details

Hoses: 4 records
Full specifications: 4 records
Systems: 1 systems
Length range: 560–960 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 9

397-8257

Installation route: 液压泵~液压泵吸油铁管

Length: 560 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. 5

178-5955

Installation route: 液压泵~液压油过滤器

Length: 610 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: 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. 9

292-7176

Installation route: 液压泵~液压油箱

Length: 960 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. 4

199-1657

Installation route: 液压泵~液压泵吸油铁管

Length: 650 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. 24

275-1497

Installation route: 液压泵~电磁阀(液压泵右后)

Length: 520 mm
Specification: DN10;6SH-6;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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Diagram Pipe No. 10

314-8215

Installation route: 液压泵~液压泵吸油铁管

Length: 600 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: 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

285-2477

Installation route: 液压泵~优先阀(液压油箱后)

Length: 600 mm
Specification: DN19;6SH-12;42Mpa
Left fitting: 45°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. 10

314-8236

Installation route: 先导泵~液压油过滤器

Length: 460 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. 3

391-6116

Installation route: 液压泵~分配阀后

Length: 1,070 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. 50

286-6769

Installation route: 液压泵~分配阀右上

Length: 2,100 mm
Specification: DN10;6SH-6;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. 9

320-0008

Installation route: 液压泵~液压油过滤器

Length: 1,200 mm
Specification: DN13;1SN-8;10.4Mpa
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. 10

314-8236

Installation route: 液压泵~电磁阀(液压泵后下)

Length: 460 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. 17

187-5741

Installation route: 液压泵~

Length: 890 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: 45°美制内螺纹平面密封

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Diagram Pipe No. 21

199-2013

Installation route: 液压泵~

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. 2

131-9869

Installation route: 先导泵~吸油铁管

Length: 482 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. 21

260-7900

Installation route: 液压泵~电磁阀(液压泵右后)

Length: 510 mm
Specification: DN10;6SH-6;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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Diagram Pipe No. 36

317-4793

Installation route: 液压泵上~电磁阀(液压泵右后)

Length: 520 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: 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. 14

087-6585

Installation route: 液压泵~电磁阀(分配阀后)

Length: 350 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: 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. 7

289-5273

Installation route: 液压泵~优先阀(液压油箱后)

Length: 590 mm
Specification: DN19;6SH-12;42Mpa
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. 4

319-9775

Installation route: 液压泵~液压泵吸油铁管

Length: 540 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: 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. 52

292-7446

Installation route: 液压泵~分配阀右上

Length: 1,180 mm
Specification: DN10;6SH-6;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. 1

7I-1288

Installation route: 液压泵~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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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®312D L 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®312D L Hydraulic Pump?

Based on published records with valid lengths, the range is 560–960 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

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

The most frequent raw specifications in the current published records are: DN25;1SN-16;7Mpa (2 records), DN10;1SN-6;10.4Mpa (1 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®312D L Hydraulic Pump?

Each record keeps the left and right fitting descriptions separate. Current examples: 397-8257: left American female thread, flat-face seal; right American female thread, flat-face seal; 178-5955: left American female thread, flat-face seal; right 90° elbow, American female thread, flat-face seal; 292-7176: 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®312D L Hydraulic Pump hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 9 (397-8257), Pipe No. 5 (178-5955), Pipe No. 9 (292-7176), Pipe No. 4 (199-1657). Open a record to compare its installation position with the linked manual page.