Hydraulic line repair data

Caterpillar CAT®312C Attachments – Quick Coupler Hose List

Coverage details

Hoses: 8 records
Full specifications: 8 records
Systems: 1 systems
Length range: 1,280–4,930 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 11

239-5715

Installation route: 大臂后段(快换)~大臂前段(快换)

Length: 1,280 mm
Specification: DN6;2SN-4;40Mpa
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

239-5711

Installation route: 大臂快换管

Length: 4,930 mm
Specification: DN6;2SN-4;40Mpa
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. 10

173-3788

Installation route: 过渡接头(小臂侧)(快换)~过渡接头(小臂上)

Length: 1,880 mm
Specification: DN6;2SN-4;40Mpa
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. 11

197-8202

Installation route: 大臂后段(快换)~大臂前段(快换)

Length: 1,350 mm
Specification: DN10;2SN-6;33Mpa
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. 3

121-1344

Installation route: 快速联轴阀~液压泵

Length: 2,815 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. 10

239-5714

Installation route: 大臂后段快换管

Length: 1,960 mm
Specification: DN6;2SN-4;40Mpa
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. 10

197-8201

Installation route: 大臂后段(快换)~

Length: 2,105 mm
Specification: DN10;2SN-6;33Mpa
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

110-5499

Installation route: 快速联轴阀~分配阀前

Length: 1,570 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. 1

239-5728

Installation route: 大臂(快换)~小臂(快换)

Length: 1,070 mm
Specification: DN6;2SN-4;40Mpa
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. 15

4I-0800

Installation route: 快速联轴阀~分配阀下

Length: 1,300 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. 5

216-4645

Installation route: 快换装置管路

Length: 715 mm
Specification: DN6;2SN-4;40Mpa
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. 4

216-4648

Installation route: 快换装置管路

Length: 715 mm
Specification: DN6;2SN-4;40Mpa
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. 9

173-4207

Installation route: 过渡接头(小臂侧)(快换)~过渡接头(小臂上)

Length: 1,400 mm
Specification: DN6;2SN-4;40Mpa
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. 9

123-4889

Installation route: 快速联轴阀~过渡接头(大臂上)

Length: 820 mm
Specification: DN10;4SP-6;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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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 Attachments – Quick Coupler?

There are 8 published records. 8 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®312C Attachments – Quick Coupler?

Based on published records with valid lengths, the range is 1,280–4,930 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 Attachments – Quick Coupler?

The most frequent raw specifications in the current published records are: DN6;2SN-4;40Mpa (4 records), DN10;2SN-6;33Mpa (2 records), DN10;-6;10.3Mpa (1 records), DN10;4SP-6;28Mpa (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 Attachments – Quick Coupler?

Each record keeps the left and right fitting descriptions separate. Current examples: 239-5715: left American female thread, flat-face seal; right American female thread, flat-face seal; 239-5711: left American female thread, flat-face seal; right American female thread, flat-face seal; 173-3788: 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 Attachments – Quick Coupler hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 11 (239-5715), Pipe No. 5 (239-5711), Pipe No. 10 (173-3788), Pipe No. 11 (197-8202). Open a record to compare its installation position with the linked manual page.