Hydraulic line repair data

Caterpillar CAT®312-A Attachments – Lock Valve Hose List

Coverage details

Hoses: 12 records
Full specifications: 12 records
Systems: 1 systems
Length range: 620–3,200 mm

Current system

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Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 7

141-6246

Installation route: 大臂油缸锁止阀~过渡接头(大臂油缸锁止阀)

Length: 620 mm
Specification: DN10;1SN-6;15.7Mpa
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. 1

137-6450

Installation route: 小臂油缸锁止阀~分配阀前

Length: 1,800 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 8

141-6245

Installation route: 右大臂油缸锁止阀~过渡接头(大臂油缸锁止阀)

Length: 765 mm
Specification: DN10;1SN-6;15.7Mpa
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. 4

7T-6625

Installation route: 过渡接头(大臂油缸锁止阀)~分配阀下

Length: 2,200 mm
Specification: DN10;1SN-6;15.7Mpa
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. 33

123-2636

Installation route: 过渡接头(大臂油缸锁止阀)~过渡阀块(大臂油缸锁止阀)

Length: 760 mm
Specification: DN16;6SH-10;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. 1

124-0868

Installation route: 大臂油缸锁止阀~过渡接头(回转接头前)

Length: 722 mm
Specification: DN16;1SN-10;10.5Mpa
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

137-4680

Installation route: 小臂油缸锁止阀

Length: 3,200 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 10

141-6247

Installation route: 左大臂油缸锁止阀~过渡接头(大臂油缸锁止阀)

Length: 910 mm
Specification: DN10;1SN-6;15.7Mpa
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. 10

7I-0187

Installation route: 过渡接头(大臂油缸锁止阀)~分配阀下

Length: 1,050 mm
Specification: DN10;-6;10.3Mpa
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. 4

137-6451

Installation route: 小臂油缸锁止阀~分配阀上

Length: 2,100 mm
Specification: DN10;1SN-6;15.7Mpa
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. 28

141-6248

Installation route: Left boom-cylinder lock valve → right boom-cylinder lock valveOriginal Chinese: 左大臂油缸锁止阀~右大臂油缸锁止阀

Length: 1,100 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: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封

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Diagram Pipe No. 1

137-4677

Installation route: 小臂油缸锁止阀

Length: 3,200 mm
Specification: DN10;1SN-6;15.7Mpa
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

5I-3136

Installation route: 过渡接头(大臂油缸锁止阀)~蓄能器电磁阀(液压油箱后)

Length: 1,900 mm
Specification: DN10;-6;10.3Mpa
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. 12

4I-1464

Installation route: 小臂油缸锁止阀~分配阀前

Length: 770 mm
Specification: DN13;-8;10.3Mpa
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. 4

135-2517

Installation route: 大臂油缸锁止阀~过渡接头(大臂油缸锁止阀)

Length: 1,100 mm
Specification: DN10;1SN-6;15.7Mpa
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. 1

5T-4741

Installation route: 过渡接头(大臂油缸锁止阀)~电磁阀(液压油箱后)

Length: 2,925 mm
Specification: DN10;1SN-6;15.7Mpa
Left fitting: 90°美制内螺纹37°锥
Right fitting: 美制内螺纹37°锥

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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®312-A Attachments – Lock Valve?

There are 12 published records. 12 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®312-A Attachments – Lock Valve?

Based on published records with valid lengths, the range is 620–3,200 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312-A Attachments – Lock Valve?

The most frequent raw specifications in the current published records are: DN10;1SN-6;15.7Mpa (6 records), DN19;1SN-12;8.7Mpa (2 records), DN10;-6;10.3Mpa (1 records), DN10;6SH-6;42Mpa (1 records), DN16;1SN-10;10.5Mpa (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®312-A Attachments – Lock Valve?

Each record keeps the left and right fitting descriptions separate. Current examples: 141-6246: left 美制内螺纹37°锥; right 美制内螺纹37°锥; 137-6450: left American female thread, flat-face seal; right American female thread, flat-face seal; 141-6245: 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®312-A Attachments – Lock Valve hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 7 (141-6246), Pipe No. 1 (137-6450), Pipe No. 8 (141-6245), Pipe No. 4 (7T-6625). Open a record to compare its installation position with the linked manual page.