Hydraulic line repair data

Caterpillar CAT®312D L Attachments Hose List

Coverage details

Hoses: 9 records
Full specifications: 9 records
Systems: 1 systems
Length range: 850–6,260 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 8

397-8253

Installation route: 控制阀(推土铲)~液压泵

Length: 1,610 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 4

202-4010

Installation route: 控制阀(推土铲)~过渡阀块(分配阀下)

Length: 880 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. 8

285-2447

Installation route: 控制阀(推土铲)~液压泵

Length: 1,840 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 9

344-6276

Installation route: 大臂(附加装置)~过渡接头(回转接头上)

Length: 6,260 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 7

294-6497

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,200 mm
Specification: DN13;4SP-8;28Mpa
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. 8

288-7709

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,850 mm
Specification: DN13;4SP-8;28Mpa
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

087-4503

Installation route: 控制阀(推土铲)~过渡阀块(分配阀下)

Length: 850 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. 4

282-5755

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,650 mm
Specification: DN13;4SP-8;28Mpa
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. 8

288-7723

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,450 mm
Specification: DN13;4SP-8;28Mpa
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

139-1765

Installation route: 推土铲油缸~铁管(大臂下)

Length: 780 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: 45°美制内螺纹平面密封

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Diagram Pipe No. 12

292-7425

Installation route: 模式转换阀~

Length: 1,460 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: 45°美制内螺纹平面密封

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Diagram Pipe No. 8

387-3666

Installation route: 控制阀(推土铲)~液压泵

Length: 1,670 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. 8

296-7242

Installation route: 控制阀(推土铲)~液压泵

Length: 1,865 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. 26

272-4186

Installation route: 过渡阀块(液压油箱后)~过渡阀块(液压油箱后)

Length: 370 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. 7

319-9920

Installation route: 推土铲手柄~

Length: 2,800 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. 3

139-1762

Installation route: 推土铲油缸~铁管(大臂下)

Length: 760 mm
Specification: DN16;4SP-10;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. 1

5I-8825

Installation route: 右踏板~进回油阀

Length: 750 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. 12

307-5153

Installation route: 右踏板~中转接头(踏板)

Length: 340 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. 22

272-4186

Installation route: 过渡阀块(液压油箱后)~过渡阀块(液压油箱后)

Length: 370 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. 36

289-5420

Installation route: 过渡阀块(分配阀左后)~

Length: 2,500 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. 4

087-5766

Installation route: 右踏板~进回油阀

Length: 680 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. 1

4I-1783

Installation route: 推土铲手柄~控制阀(推土铲)

Length: 1,500 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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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 Attachments?

There are 9 published records. 9 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 Attachments?

Based on published records with valid lengths, the range is 850–6,260 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 Attachments?

The most frequent raw specifications in the current published records are: DN13;4SP-8;28Mpa (4 records), DN10;-6;10.3Mpa (2 records), DN16;4SP-10;28Mpa (2 records), DN10;6SH-6;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®312D L Attachments?

Each record keeps the left and right fitting descriptions separate. Current examples: 397-8253: left American female thread, flat-face seal; right American female thread, flat-face seal; 202-4010: left American female thread, flat-face seal; right American female thread, flat-face seal; 285-2447: 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 Attachments hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 8 (397-8253), Pipe No. 4 (202-4010), Pipe No. 8 (285-2447), Pipe No. 9 (344-6276). Open a record to compare its installation position with the linked manual page.