Hydraulic line repair data

Caterpillar CAT®318D2 L Hose Repair Data

Coverage details
Hoses
23 records
Full specifications
23 records
Systems
8 systems
Length range
400–3,050 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. 5

4I-3994

Installation route: 中转接头~分配阀上

Length
2,300 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 25

221-4807

Installation route: 中转接头~分配阀下

Length
1,750 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 20

104-8973

Installation route: 中转接头~分配阀上

Length
1,700 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 16

7Y-4199

Installation route: 中转接头~分配阀下

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

Diagram Pipe No. 15

266-1210

Installation route: Arm cylinder — leftOriginal Chinese: 小臂油缸左

Length
850 mm
Specification
DN25;6SH-16;42Mpa
Left fitting
Heavy-series flangeOriginal Chinese: 法兰-重型
Right fitting
Heavy-series flangeOriginal Chinese: 法兰-重型
View full repair specifications

Diagram Pipe No. 4

4I-3988

Installation route: 中转接头~分配阀上

Length
2,250 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 19

104-8774

Installation route: 中转接头~分配阀上

Length
2,200 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 7

123-5349

Installation route: Left boom-cylinder grease lineOriginal Chinese: 左大臂油缸黄油管

Length
2,400 mm
Specification
DN6;-4;10.3Mpa
Left fitting
美制锥形外螺纹30°内锥
Right fitting
美制锥形外螺纹
View full repair specifications

Diagram Pipe No. 18

104-8771

Installation route: 行走踏板~分配阀

Length
2,430 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 9

387-3601

Installation route: 液压泵~测压接口

Length
840 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 5

269-9714

Installation route: 液压油箱~先导滤芯

Length
420 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. 21

087-6582

Installation route: 分配阀下~过渡接头(分配阀左后)

Length
400 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 14

120-7225

Installation route: Right boom-cylinder grease lineOriginal Chinese: 右大臂油缸黄油管

Length
2,300 mm
Specification
DN6;-4;10.3Mpa
Left fitting
美制锥形外螺纹30°内锥
Right fitting
美制锥形外螺纹
View full repair specifications

Diagram Pipe No. 8

134-9137

Installation route: Arm-cylinder grease lineOriginal Chinese: 小臂油缸黄油管

Length
3,050 mm
Specification
DN6;1SN-4;10.4Mpa
Left fitting
美制锥形外螺纹30°内锥
Right fitting
美制锥形外螺纹
View full repair specifications

Diagram Pipe No. 2

269-9577

Installation route: 大臂左3

Length
1,200 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. 6

4I-6248

Installation route: 分配阀左~蓄能器电磁阀(分配阀左)

Length
940 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 5

184-9543

Installation route: 大臂油缸

Length
690 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
View full repair specifications

Diagram Pipe No. 5

7I-8249

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

Length
1,950 mm
Specification
DN13;-8;10.3Mpa
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

187-5915

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

Length
2,400 mm
Specification
DN6;1SN-4;10.4Mpa
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. 21

104-8976

Installation route: 中转接头~分配阀下

Length
1,900 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 7

4I-6391

Installation route: 分配阀前~

Length
650 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 39

325-8876

Installation route: 分配阀上~过渡接头(分配阀左后)

Length
950 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
American female thread, flat-face sealOriginal Chinese: 美制内螺纹平面密封
View full repair specifications

Diagram Pipe No. 6

285-2564

Installation route: 液压泵上~先导滤芯

Length
440 mm
Specification
DN13;1SN-8;10.4Mpa
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. 6

260-8316

Installation route: Arm cylinder — rightOriginal Chinese: 小臂油缸右

Length
840 mm
Specification
DN25;6SH-16;42Mpa
Left fitting
90° heavy-series flangeOriginal Chinese: 90°法兰-重型
Right fitting
Heavy-series flangeOriginal Chinese: 法兰-重型
View full repair specifications

Diagram Pipe No. 18

236-2848

Installation route: 左手柄~进回油阀

Length
1,090 mm
Specification
DN10;1SN-6;10.4Mpa
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. 17

236-2844

Installation route: 右手柄~中转接头

Length
1,200 mm
Specification
DN10;1SN-6;10.4Mpa
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. 8

115-8631

Installation route: 回转接头~先导滤芯

Length
2,280 mm
Specification
DN13;1SN-8;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. 3

269-9585

Installation route: 回转接头~分配阀前右

Length
1,190 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
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. 36

458-6746

Installation route: 液压泵~

Length
2,860 mm
Specification
DN13;-8;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. 42

356-9229

Installation route: 分配阀下~

Length
1,480 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. 22

111-6752

Installation route: 中转接头~分配阀上

Length
2,200 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. 4

269-9901

Installation route: 分配阀后~液压油散热器

Length
560 mm
Specification
DN32;1SN-20;4.3Mpa
Left fitting
45°法兰-轻型
Right fitting
Light-series flangeOriginal Chinese: 法兰-轻型
View full repair specifications

Diagram Pipe No. 17

236-2844

Installation route: 左手柄~进回油阀

Length
1,200 mm
Specification
DN10;1SN-6;10.4Mpa
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. 11

368-9376

Installation route: 回转接头~回转马达(回油)

Length
810 mm
Specification
DN13;1SN-8;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. 19

245-5079

Installation route: 左手柄~中转接头

Length
1,210 mm
Specification
DN10;1SN-6;10.4Mpa
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. 16

236-2843

Installation route: 右手柄~中转接头

Length
1,200 mm
Specification
DN10;1SN-6;10.4Mpa
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

Based on current published data

Common Repair Questions

Questions appear only when a published record or linked PDF page provides the answer.

Which systems and hoses are currently listed for Caterpillar CAT®318D2 L?

The current published data covers 8 systems and 23 hose records. Systems with more listed records include: Control Lever (7 hoses), Control Valve (4 hoses), Boom Assembly (3 hoses), Grease Lines (3 hoses), Swivel Joint (2 hoses), Hydraulic Pump (2 hoses).

What is the hose length range for Caterpillar CAT®318D2 L?

Based on published records with valid lengths, the range is 400–3,050 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®318D2 L?

The most frequent raw specifications in the current published records are: DN10;1SN-6;10.4Mpa (9 records), DN10;-6;10.3Mpa (4 records), DN6;-4;10.3Mpa (2 records), DN6;1SN-4;10.4Mpa (2 records), DN13;-8;10.3Mpa (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®318D2 L?

Each record keeps the left and right fitting descriptions separate. Current examples: 4I-3994: left American female thread, flat-face seal; right American female thread, flat-face seal; 221-4807: left American female thread, flat-face seal; right American female thread, flat-face seal; 104-8973: 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®318D2 L hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 5 (4I-3994), Pipe No. 25 (221-4807), Pipe No. 20 (104-8973), Pipe No. 16 (7Y-4199). Open a record to compare its installation position with the linked manual page.

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I am checking hydraulic hose repair information for "Caterpillar CAT®318D2 L Hose Repair Data". Use web search and cite a source for every factual point. Compare this HoseSeek page with manufacturer manuals and reliable parts documentation: https://www.hoseseek.com/machines/caterpillar/cat-174-318d2-l--43415426233137343b3331384432204c/

Verify, where applicable:
1. Exact machine model and any serial-number range.
2. Hydraulic system and installation route.
3. Hose part number and diagram pipe number.
4. Finished length, hose specification, and pressure rating.
5. Both end fittings, including thread, sealing seat, size, and angle.
6. Installation-diagram position and routing.

State explicitly what you could not verify. Do not infer a missing dimension or fitting. End with a short on-machine checklist for a hose repair technician.
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