Hydraulic line repair data

Caterpillar CAT®318F L Attachments – Quick Coupler Hose List

Coverage details

Hoses: 22 records
Full specifications: 22 records
Systems: 1 systems
Length range: 370–6,260 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. 12

337-2712

Installation route: 快速联轴阀~液压油箱

Length: 1,040 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

View full repair specifications

Diagram Pipe No. 6

422-2976

Installation route: 小臂接头(快换)~快换装置

Length: 1,475 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

View full repair specifications

Diagram Pipe No. 9

344-6276

Installation route: 大臂(快换)~小臂(快换)

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

View full repair specifications

Diagram Pipe No. 14

337-2712

Installation route: 快速联轴阀(液压泵上)~液压油箱

Length: 1,040 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

View full repair specifications

Diagram Pipe No. 5

422-2975

Installation route: 小臂接头(快换)~快换装置

Length: 1,465 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

View full repair specifications

Diagram Pipe No. 3

173-7865

Installation route: 大臂(快换)~小臂(快换)

Length: 1,540 mm
Specification: DN13；4SP-8；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

View full repair specifications

Diagram Pipe No. 17

368-9393

Installation route: 快速联轴阀(液压泵上)~单向阀(液压油箱后)

Length: 430 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

View full repair specifications

Diagram Pipe No. 16

350-0840

Installation route: 大臂(快换)~快速联轴阀

Length: 1,010 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

View full repair specifications

Diagram Pipe No. 5

347-6563

Installation route: 小臂(快换)~小臂接头(快换)

Length: 402 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

View full repair specifications

Diagram Pipe No. 21

463-5709

Installation route: 大臂(快换)~快速联轴阀

Length: 2,260 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

View full repair specifications

Diagram Pipe No. 4

347-6564

Installation route: 小臂接头(快换)~快换装置

Length: 484 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

View full repair specifications

Diagram Pipe No. 1

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

View full repair specifications

Diagram Pipe No. 10

307-4943

Installation route: 大臂(快换)~快速联轴阀

Length: 2,700 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

View full repair specifications

Diagram Pipe No. 14

350-0840

Installation route: 大臂(快换)~分配阀前

Length: 1,010 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

View full repair specifications

Diagram Pipe No. 13

348-1331

Installation route: 大臂(快换)~快速联轴阀

Length: 1,330 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

View full repair specifications

Diagram Pipe No. 25

471-3444

Installation route: 快速联轴阀~液压泵

Length: 370 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

View full repair specifications

Diagram Pipe No. 13

337-1238

Installation route: 快速联轴阀(液压泵上)~单向阀(液压油箱后)

Length: 530 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

View full repair specifications

Diagram Pipe No. 3

347-6563

Installation route: 小臂接头(快换)~快换装置

Length: 402 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

View full repair specifications

Diagram Pipe No. 3

173-7864

Installation route: 大臂(快换)~小臂(快换)

Length: 1,800 mm
Specification: DN13；4SP-8；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

View full repair specifications

Diagram Pipe No. 1

177-8407

Installation route: 大臂(快换)~小臂(快换)

Length: 1,540 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

View full repair specifications

Diagram Pipe No. 24

469-4981

Installation route: 快速联轴阀~快换电磁阀

Length: 510 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

View full repair specifications

Diagram Pipe No. 6

347-6564

Installation route: 小臂(快换)~小臂接头(快换)

Length: 484 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

View full repair specifications

Workshop guide

Finding the correct hydraulic hose for Caterpillar CAT®318F L Attachments – Quick Coupler

Start with the machine and route

For Caterpillar CAT®318F L Attachments – Quick Coupler, 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®318F L 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

337-27121,040 mm · DN10；1SN-6；10.4Mpa · 快速联轴阀~液压油箱
422-29761,475 mm · DN6；2SN-4；40Mpa · 小臂接头(快换)~快换装置
344-62766,260 mm · DN10；6SH-6；42Mpa · 大臂(快换)~小臂(快换)

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®318F L Attachments – Quick Coupler?

There are 22 published records. 22 include a length, both end fittings, and a part number or diagram pipe number.

What is the hose length range for Caterpillar CAT®318F L Attachments – Quick Coupler?

Based on published records with valid lengths, the range is 370–6,260 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®318F L Attachments – Quick Coupler?

The most frequent raw specifications in the current published records are: DN10；6SH-6；42Mpa (7 records), DN6；2SN-4；40Mpa (7 records), DN10；1SN-6；10.4Mpa (2 records), DN13；4SP-8；28Mpa (2 records), DN13；6SH-8；42Mpa (2 records). Verify the specification together with length, pressure, and fitting details.

How can I identify the left and right hose fittings for Caterpillar CAT®318F L Attachments – Quick Coupler?

Each record keeps the left and right fitting descriptions separate. Current examples: 337-2712: left American female thread, flat-face seal; right 90° elbow, American female thread, flat-face seal; 422-2976: left American female thread, flat-face seal; right American female thread, flat-face seal; 344-6276: 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®318F L Attachments – Quick Coupler hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 12 (337-2712), Pipe No. 6 (422-2976), Pipe No. 9 (344-6276), Pipe No. 14 (337-2712). Open a record to compare its installation position with the linked manual page.