Hydraulic line repair data

Caterpillar CAT®M318 Swivel Joint Hose List

Coverage details

Hoses: 39 records
Full specifications: 39 records
Systems: 1 systems
Length range: 490–2,300 mm

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Hose repair details

Hose Length and Fitting List

Showing 36 representative records. Return to the finder for a more specific search.

Diagram Pipe No. 7

144-2650

Installation route: 回转接头~分配阀前

Length: 570 mm
Specification: DN25；4SP-16；35Mpa
Left fitting: Heavy-series flangeOriginal Chinese: 法兰-重型
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. 13

137-6741

Installation route: 回转接头~后传动轴

Length: 730 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

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Diagram Pipe No. 5

221-9468

Installation route: 回转接头~后传动轴

Length: 1,150 mm
Specification: DN10；2SN-6；33Mpa
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. 7

132-8587

Installation route: 回转接头~分配阀前

Length: 1,090 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. 15

137-6743

Installation route: 回转接头~前左/前右行走马达

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

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Diagram Pipe No. 9

144-2558

Installation route: 回转接头~电磁阀(驾驶室)

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

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Diagram Pipe No. 19

148-9916

Installation route: 回转接头~蓄能器电磁阀(液压油箱前)

Length: 1,700 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

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Diagram Pipe No. 9

154-9350

Installation route: 回转接头~后传动轴

Length: 995 mm
Specification: DN13；1SN-8；14Mpa
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

137-1836

Installation route: 回转接头~变速箱

Length: 700 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

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Diagram Pipe No. 8

144-2646

Installation route: 回转接头~变速箱

Length: 900 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: 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. 12

137-6740

Installation route: 回转接头~变速箱

Length: 1,600 mm
Specification: DN13；1SN-8；14Mpa
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. 14

137-6742

Installation route: 回转接头~后传动轴

Length: 500 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

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Diagram Pipe No. 10

144-2559

Installation route: 回转接头~电磁阀(驾驶室)

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

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Diagram Pipe No. 6

113-0418

Installation route: 回转接头~分配阀前

Length: 1,120 mm
Specification: DN19；4SP-12；35Mpa
Left fitting: 45° heavy-series flangeOriginal Chinese: 45°法兰-重型
Right fitting: Heavy-series flangeOriginal Chinese: 法兰-重型

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Diagram Pipe No. 8

132-8587

Installation route: 回转接头~液压油箱

Length: 1,090 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. 9

144-2652

Installation route: 回转接头~分配阀前

Length: 670 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: 90° heavy-series flangeOriginal Chinese: 90°法兰-重型

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Diagram Pipe No. 17

137-6745

Installation route: 回转接头~后左/后右行走马达

Length: 1,800 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

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Diagram Pipe No. 2

144-6051

Installation route: 回转接头~

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

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Diagram Pipe No. 12

176-7805

Installation route: 回转接头~变速箱

Length: 1,000 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

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Diagram Pipe No. 5

113-0492

Installation route: 回转接头~方向盘

Length: 1,500 mm
Specification: DN10；2SN-6；33Mpa
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. 2

144-6051

Installation route: 回转接头~转向装置

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

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Diagram Pipe No. 17

194-8459

Installation route: 回转接头~

Length: 530 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

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Diagram Pipe No. 3

144-6053

Installation route: 回转接头~转向装置

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

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Diagram Pipe No. 3

144-6053

Installation route: 回转接头~

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

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Diagram Pipe No. 10

144-2653

Installation route: 回转接头~分配阀前

Length: 490 mm
Specification: DN19；4SP-12；35Mpa
Left fitting: Heavy-series flangeOriginal Chinese: 法兰-重型
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

118-0669

Installation route: 回转接头~变速箱

Length: 1,490 mm
Specification: DN13；1SN-8；14Mpa
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. 9

137-3872

Installation route: 回转接头~后传动轴

Length: 1,000 mm
Specification: DN13；1SN-8；14Mpa
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

113-0415

Installation route: 回转接头~分配阀前

Length: 1,000 mm
Specification: DN19；4SP-12；35Mpa
Left fitting: 45° heavy-series flangeOriginal Chinese: 45°法兰-重型
Right fitting: Heavy-series flangeOriginal Chinese: 法兰-重型

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Diagram Pipe No. 11

176-7804

Installation route: 回转接头~变速箱

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

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Diagram Pipe No. 12

137-6740

Installation route: 回转接头~后传动轴

Length: 1,600 mm
Specification: DN13；1SN-8；14Mpa
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. 3

112-9846

Installation route: 回转接头~分配阀前

Length: 1,100 mm
Specification: DN25；4SP-16；28Mpa
Left fitting: 45° heavy-series flangeOriginal Chinese: 45°法兰-重型
Right fitting: Heavy-series flangeOriginal Chinese: 法兰-重型

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Diagram Pipe No. 6

113-0493

Installation route: 回转接头~方向盘

Length: 1,900 mm
Specification: DN10；2SN-6；33Mpa
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

113-0072

Installation route: 回转接头~分配阀前

Length: 1,100 mm
Specification: DN25；4SP-16；28Mpa
Left fitting: 45° heavy-series flangeOriginal Chinese: 45°法兰-重型
Right fitting: Heavy-series flangeOriginal Chinese: 法兰-重型

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Diagram Pipe No. 6

137-3869

Installation route: 回转接头~后传动轴

Length: 1,150 mm
Specification: DN10；2SN-6；33Mpa
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

View full repair specifications

Diagram Pipe No. 13

137-6742

Installation route: 回转接头~后右行走马达

Length: 500 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

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Diagram Pipe No. 4

137-1835

Installation route: 回转接头~变速箱

Length: 900 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

Workshop guide

Finding the correct hydraulic hose for Caterpillar CAT®M318 Swivel Joint

Start with the machine and route

For Caterpillar CAT®M318 Swivel Joint, identify the exact model and hydraulic system on the machine first. A part number or diagram pipe number is the fastest way to narrow a replacement hose; if neither is visible, compare the installation route and the existing hose.

See all Caterpillar CAT®M318 systems

Read the dimensions before cutting

Check whether a listed dimension is finished assembly length, hose-only length, or cut length. These are not interchangeable. Confirm hose specification and pressure rating, then compare both ends separately: thread, sealing seat, size, angle, and orientation.

Records to compare

144-2650570 mm · DN25；4SP-16；35Mpa · 回转接头~分配阀前
137-6741730 mm · DN10；1SN-6；15.7Mpa · 回转接头~后传动轴
221-94681,150 mm · DN10；2SN-6；33Mpa · 回转接头~后传动轴

Use the drawing as a location check

Where an installation drawing or manual figure is available, match its callout to the part number and physical route. A hydraulic circuit diagram explains connections but does not show the exact routing of a hose on the machine. Take the old hose or clear end-fitting photographs to the workshop if any dimension is missing.

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®M318 Swivel Joint?

There are 39 published records. 39 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®M318 Swivel Joint?

Based on published records with valid lengths, the range is 490–2,300 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®M318 Swivel Joint?

The most frequent raw specifications in the current published records are: DN10；1SN-6；15.7Mpa (10 records), DN10；2SN-6；33Mpa (8 records), DN25；4SP-16；35Mpa (6 records), DN13；1SN-8；14Mpa (5 records), DN19；4SP-12；35Mpa (4 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Caterpillar CAT®M318 Swivel Joint?

Each record keeps the left and right fitting descriptions separate. Current examples: 144-2650: left Heavy-series flange; right American female thread, flat-face seal; 137-6741: left American female thread, flat-face seal; right 90° elbow, American female thread, flat-face seal; 221-9468: left 45°美制内螺纹平面密封; 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®M318 Swivel Joint hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 7 (144-2650), Pipe No. 13 (137-6741), Pipe No. 5 (221-9468), Pipe No. 7 (132-8587). Open a record to compare its installation position with the linked manual page.