Hydraulic line repair data

Caterpillar CAT®312E L Attachments – Quick Coupler Hose List

Coverage details

Hoses: 10 records
Full specifications: 10 records
Systems: 1 systems
Length range: 860–6,260 mm

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 9

344-6276

Installation route: 大臂(前段)~小臂

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. 14

443-8307

Installation route: 大臂(快换)~电磁阀(液压泵上)

Length: 2,260 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. 4

087-5760

Installation route: 电磁阀(液压泵上)~吸油铁管

Length: 1,030 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. 2

382-7079

Installation route: 大臂(快换)~小臂(快换)

Length: 1,580 mm
Specification: DN13;6SH-8;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. 6

443-8311

Installation route: 大臂(前段)~小臂

Length: 5,980 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. 19

462-5211

Installation route: 大臂(快换)~电磁阀(液压泵上)

Length: 2,140 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. 20

462-5214

Installation route: 大臂(快换)~电磁阀(液压泵上)

Length: 2,160 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. 11

337-1286

Installation route: 分配阀前右~铁管(大臂)

Length: 860 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. 15

358-7418

Installation route: 大臂(快换)~电磁阀(液压泵上)

Length: 2,320 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. 4

363-2569

Installation route: 大臂(快换)~小臂(快换)

Length: 1,800 mm
Specification: DN13;6SH-8;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. 23

462-5223

Installation route: 电磁阀(液压泵上)~电磁阀(液压泵上)

Length: 480 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. 25

475-1155

Installation route: 先导泵~电磁阀(液压泵上)

Length: 430 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. 18

450-9738

Installation route: 分配阀上右~电磁阀(液压泵上)

Length: 995 mm
Specification: DN10;-6;10.3Mpa
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

087-5773

Installation route: 电磁阀(液压泵上)~吸油铁管

Length: 1,050 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. 19

450-9739

Installation route: 蓄能器电磁阀(液压泵后下)~电磁阀(液压泵上)

Length: 494 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. 21

462-5217

Installation route: 电磁阀(液压泵上)~单向阀(液压泵上)

Length: 810 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: 45°美制内螺纹平面密封

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Diagram Pipe No. 22

462-5220

Installation route: 电磁阀(液压泵上)~单向阀(液压泵上)

Length: 700 mm
Specification: DN10;6SH-6;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. 2

347-3727

Installation route: 小臂(快换)~接线板(快换)

Length: 450 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: 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

245-5022

Installation route: 液压泵~电磁阀(液压泵上)

Length: 450 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. 5

337-1372

Installation route: 电磁阀(液压泵上)~吸油铁管

Length: 1,070 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

087-5775

Installation route: 电磁阀(液压泵上)~吸油铁管

Length: 1,130 mm
Specification: DN10;-6;10.3Mpa
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

354-4462

Installation route: 分配阀前右~电磁阀(液压泵上)

Length: 1,500 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: 45°美制内螺纹平面密封

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Diagram Pipe No. 3

347-3728

Installation route: 小臂(快换)~接线板(快换)

Length: 450 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: 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®312E L Attachments – Quick Coupler?

There are 10 published records. 10 include a length, both end fittings, and a part number or diagram pipe number.

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

Based on published records with valid lengths, the range is 860–6,260 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312E L Attachments – Quick Coupler?

The most frequent raw specifications in the current published records are: DN10;6SH-6;42Mpa (3 records), DN6;2SN-4;40Mpa (3 records), DN13;6SH-8;42Mpa (2 records), DN10;-6;10.3Mpa (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®312E L Attachments – Quick Coupler?

Each record keeps the left and right fitting descriptions separate. Current examples: 344-6276: left American female thread, flat-face seal; right American female thread, flat-face seal; 443-8307: left American female thread, flat-face seal; right American female thread, flat-face seal; 087-5760: 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®312E L Attachments – Quick Coupler hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 9 (344-6276), Pipe No. 14 (443-8307), Pipe No. 4 (087-5760), Pipe No. 2 (382-7079). Open a record to compare its installation position with the linked manual page.