Hydraulic line repair data

Caterpillar CAT®312E L Attachments Hose List

Coverage details
Hoses
15 records
Full specifications
15 records
Systems
1 systems
Length range
300–1,580 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.

Search another machine

Hose repair details

Hose Length and Fitting List

Diagram Pipe No. 3

139-1765

Installation route: 推土铲油缸~铁管(大臂下)

Length
780 mm
Specification
DN16;4SP-10;28Mpa
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. 2

4I-1025

Installation route: 右踏板~中转接头(踏板)

Length
300 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
View full repair specifications

Diagram Pipe No. 2

111-0976

Installation route: 推土铲手柄~进回油阀

Length
1,580 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
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

176-4591

Installation route: 过渡阀块(液压油箱下)~测压接头(液压泵后)

Length
650 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
45°美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 1

4I-0800

Installation route: 右踏板~进回油阀

Length
1,300 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

325-9054

Installation route: 铁管(大臂下左)~铁管(大臂)

Length
900 mm
Specification
DN13;4SP-8;28Mpa
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. 3

4I-1671

Installation route: 减压阀(分配阀下)~过渡阀块(分配阀下)

Length
370 mm
Specification
DN10;1SN-6;10.4Mpa
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. 5

356-9146

Installation route: 控制阀(回转接头右)~铁管(大臂下左)

Length
420 mm
Specification
DN13;4SP-8;28Mpa
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. 8

356-9221

Installation route: 控制阀(回转接头右)~铁管(大臂下左)

Length
410 mm
Specification
DN13;4SP-8;28Mpa
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. 2

108-7581

Installation route: 控制阀(回转接头右)~铁管(大臂下左)

Length
500 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
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

4I-1878

Installation route: 右踏板~进回油阀

Length
1,380 mm
Specification
DN10;1SN-6;10.4Mpa
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

111-0976

Installation route: 推土铲手柄~控制阀(回转接头右)

Length
1,580 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
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

354-4597

Installation route: 推土铲手柄~控制阀(回转接头右)

Length
1,440 mm
Specification
DN10;-6;10.3Mpa
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. 1

492-8432

Installation route: 小臂破碎器截止阀~铲斗

Length
1,575 mm
Specification
DN10;2SN-6;35Mpa
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

139-1762

Installation route: 推土铲油缸~铁管(大臂下)

Length
760 mm
Specification
DN16;4SP-10;28Mpa
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

Workshop guide

Finding the correct hydraulic hose for Caterpillar CAT®312E L Attachments

Start with the machine and route

For Caterpillar CAT®312E L Attachments, 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®312E 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

  • 139-1765780 mm · DN16;4SP-10;28Mpa · 推土铲油缸~铁管(大臂下)
  • 4I-1025300 mm · DN10;-6;10.3Mpa · 右踏板~中转接头(踏板)
  • 111-09761,580 mm · DN10;-6;10.3Mpa · 推土铲手柄~进回油阀

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®312E L Attachments?

There are 15 published records. 15 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?

Based on published records with valid lengths, the range is 300–1,580 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?

The most frequent raw specifications in the current published records are: DN10;-6;10.3Mpa (4 records), DN13;4SP-8;28Mpa (4 records), DN10;1SN-6;10.4Mpa (3 records), DN16;4SP-10;28Mpa (2 records), DN10;2SN-6;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®312E L Attachments?

Each record keeps the left and right fitting descriptions separate. Current examples: 139-1765: left American female thread, flat-face seal; right 45°美制内螺纹平面密封; 4I-1025: left 90° elbow, American female thread, flat-face seal; right American female thread, flat-face seal; 111-0976: left American female thread, flat-face seal; right 90° elbow, 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 hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 3 (139-1765), Pipe No. 2 (4I-1025), Pipe No. 2 (111-0976), Pipe No. 3 (176-4591). Open a record to compare its installation position with the linked manual page.

Scroll to Top