Hydraulic line repair data

Caterpillar CAT®M312 Swivel Joint Hose List

Coverage details

Hoses: 3 records
Full specifications: 3 records
Systems: 1 systems
Length range: 930–2,000 mm

Current system

Find a hose in this system

Use the number on the diagram, a part number, connection point, length, hose size, or fitting.

Pipe number, part number, route, length, or fittingSearch another machine

Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 2

9U-4915

Installation route: 回转接头~液压油箱

Length: 1,070 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

View full repair specifications

Diagram Pipe No. 10

151-4617

Installation route: 回转接头~后桥

Length: 2,000 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

View full repair specifications

Diagram Pipe No. 8

148-7541

Installation route: 回转接头~分配阀前左

Length: 930 mm
Specification: DN19;4SP-12;35Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: Heavy-series flangeOriginal Chinese: 法兰-重型

View full repair specifications

Diagram Pipe No. 9

151-2859

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 560 mm
Specification: DN25;4SP-16;35Mpa
Left fitting: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型
Right fitting: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型

View full repair specifications

Diagram Pipe No. 12

151-8789

Installation route: 回转接头~前传动轴

Length: 1,250 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: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

View full repair specifications

Diagram Pipe No. 2

144-6053

Installation route: 回转接头~方向盘

Length: 1,900 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: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

View full repair specifications

Diagram Pipe No. 6

148-7539

Installation route: 回转接头~分配阀前右

Length: 950 mm
Specification: DN25;4SP-16;35Mpa
Left fitting: Heavy-series flangeOriginal Chinese: 法兰-重型
Right fitting: 45°美制内螺纹平面密封

View full repair specifications

Diagram Pipe No. 11

176-7799

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 600 mm
Specification: DN25;4SP-16;35Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°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

View full repair specifications

Diagram Pipe No. 9

148-7542

Installation route: 回转接头~分配阀前左

Length: 580 mm
Specification: DN19;4SP-12;35Mpa
Left fitting: American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
Right fitting: 45° heavy-series flangeOriginal Chinese: 45°法兰-重型

View full repair specifications

Diagram Pipe No. 12

149-8341

Installation route: 回转接头~制动踏板

Length: 1,900 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: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

View full repair specifications

Diagram Pipe No. 11

151-4743

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 700 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: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

View full repair specifications

Diagram Pipe No. 13

186-3140

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 910 mm
Specification: DN16;1SN-10;10.5Mpa
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

View full repair specifications

Diagram Pipe No. 17

148-9868

Installation route: 回转接头~电磁阀(驾驶室升降架下)

Length: 1,600 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: 45°美制内螺纹平面密封

View full repair specifications

Diagram Pipe No. 8

143-9398

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 850 mm
Specification: DN25;4SP-16;35Mpa
Left fitting: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型
Right fitting: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型

View full repair specifications

Diagram Pipe No. 7

148-7540

Installation route: 回转接头~分配阀前右

Length: 850 mm
Specification: DN25;4SP-16;35Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封
Right fitting: Heavy-series flangeOriginal Chinese: 法兰-重型

View full repair specifications

Diagram Pipe No. 1

144-6051

Installation route: 回转接头~方向盘

Length: 1,500 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: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°美制内螺纹平面密封

View full repair specifications

Diagram Pipe No. 7

144-2559

Installation route: 回转接头~制动踏板

Length: 2,300 mm
Specification: DN10;1SN-6;15.7Mpa
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

View full repair specifications

Diagram Pipe No. 12

176-7808

Installation route: Swivel joint → travel motorOriginal Chinese: 回转接头~行走马达

Length: 1,250 mm
Specification: DN25;4SP-16;35Mpa
Left fitting: 90° elbow, American female thread, flat-face sealOriginal Chinese: 90°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

View full repair specifications

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®M312 Swivel Joint?

There are 3 published records. 3 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®M312 Swivel Joint?

Based on published records with valid lengths, the range is 930–2,000 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®M312 Swivel Joint?

The most frequent raw specifications in the current published records are: DN10;2SN-6;33Mpa (1 records), DN19;1SN-12;8.7Mpa (1 records), DN19;4SP-12;35Mpa (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®M312 Swivel Joint?

Each record keeps the left and right fitting descriptions separate. Current examples: 9U-4915: left American female thread, flat-face seal; right American female thread, flat-face seal; 151-4617: left American female thread, flat-face seal; right American female thread, flat-face seal; 148-7541: left American female thread, flat-face seal; right Heavy-series flange. Open the exact part-number or pipe-number record; do not swap ends based on appearance alone.

Can I locate a Caterpillar CAT®M312 Swivel Joint hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 2 (9U-4915), Pipe No. 10 (151-4617), Pipe No. 8 (148-7541). Open a record to compare its installation position with the linked manual page.