Length: 415 mm
Specification: DN10;4SP-6;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. 18

3T-3848

Installation route: 燃油箱~燃油过滤器

Length: 330 mm
Specification: DN6;1SN-4;19.2Mpa
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. 2

6N-8659

Installation route: 燃油过滤器~开关阀(燃油箱)

Length: 394 mm
Specification: DN6;1SN-4;19.2Mpa
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. 2

3V-6153

Installation route: 燃油过滤器~开关阀(燃油箱)

Length: 430 mm
Specification: DN6;1SN-4;19.2Mpa
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

6W-6300

Installation route: 先导泵~液压油箱

Length: 1,460 mm
Specification: DN38;2层纤维+螺旋钢丝-24;1Mpa
Left fitting: 90° light-series flangeOriginal Chinese: 90°法兰-轻型
Right fitting: 90° light-series flangeOriginal Chinese: 90°法兰-轻型

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Diagram Pipe No. 13

8R-5130

Installation route: 回转接头~行走马达(规格2)

Length: 1,710 mm
Specification: DN25;4SP-16;35Mpa
Left fitting: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型
Right fitting: 67°法兰-重型

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Diagram Pipe No. 9

8K-3202

Installation route: 大臂左1/左2/左3/左4

Length: 1,575 mm
Specification: DN32;4SP-20;35Mpa
Left fitting: Heavy-series flangeOriginal Chinese: 法兰-重型
Right fitting: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型

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Diagram Pipe No. 5

3W-7492

Installation route: 先导阀(中转接头后)~过渡阀块(分配阀上)

Length: 940 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. 5

3V-1185

Installation route: 先导阀(中转接头后)~过渡阀块(分配阀上)

Length: 930 mm
Specification: DN10;4SP-6;28Mpa
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. 13

6W-4642

Installation route: 液压泵~组合阀(液压油箱左下)

Length: 1,400 mm
Specification: DN32;4SP-20;35Mpa
Left fitting: 45° heavy-series flangeOriginal Chinese: 45°法兰-重型
Right fitting: 45° heavy-series flangeOriginal Chinese: 45°法兰-重型

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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.

Which systems and hoses are currently listed for Caterpillar CAT®231D?

The current published data covers 11 systems and 30 hose records. Systems with more listed records include: Fuel Lines (6 hoses), Solenoid Valve (6 hoses), Control Lever (4 hoses), Control Valve (3 hoses), Attachments (3 hoses), Swing Motor (2 hoses).

What is the hose length range for Caterpillar CAT®231D?

Based on published records with valid lengths, the range is 279–2,380 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®231D?

The most frequent raw specifications in the current published records are: DN10;1SN-6;15.7Mpa (6 records), DN10;4SP-6;28Mpa (6 records), DN6;1SN-4;19.2Mpa (4 records), DN13;1SN-8;14Mpa (3 records), DN19;1SN-12;8.7Mpa (3 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Caterpillar CAT®231D?

Each record keeps the left and right fitting descriptions separate. Current examples: 7V-1038: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 7V-7377: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 2V-8571: 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®231D hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 39 (7V-1038), Pipe No. 5 (7V-7377), Pipe No. 12 (2V-8571), Pipe No. 47 (2V-0156). Open a record to compare its installation position with the linked manual page.

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The question is already written for this machine or hose. Use a tool with web search enabled; treat its answer as a starting point and verify on the machine.

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See the exact question being sent

I am checking hydraulic hose repair information for "Caterpillar CAT®231D Hose Repair Data". Use web search and cite a source for every factual point. Compare this HoseSeek page with manufacturer manuals and reliable parts documentation: https://www.hoseseek.com/machines/caterpillar/cat-174-231d--43415426233137343b32333144/

Verify, where applicable:
1. Exact machine model and any serial-number range.
2. Hydraulic system and installation route.
3. Hose part number and diagram pipe number.
4. Finished length, hose specification, and pressure rating.
5. Both end fittings, including thread, sealing seat, size, and angle.
6. Installation-diagram position and routing.

State explicitly what you could not verify. Do not infer a missing dimension or fitting. End with a short on-machine checklist for a hose repair technician.

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Hose Length and Fitting List

Common Repair Questions

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