Hydraulic line repair data

Caterpillar CAT®312D2 GC Hose Repair Data

Coverage details
Hoses
37 records
Full specifications
37 records
Systems
12 systems
Length range
370–2,850 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. 18

108-7360

Installation route: 中转接头~分配阀上左

Length
2,050 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. 3

4I-3994

Installation route: 分配阀前~蓄能器电磁阀(液压泵旁左)

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. 16

4I-1037

Installation route: 中转接头~分配阀下右

Length
1,400 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. 17

104-8973

Installation route: 中转接头~分配阀上左

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. 5

123-2636

Installation route: 大臂油缸左1/左4

Length
760 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

307-5096

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

Length
1,800 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. 2

277-1251

Installation route: 大臂(快换)~小臂(快换)

Length
1,400 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. 4

4I-5933

Installation route: 中转接头~分配阀下左

Length
1,600 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. 2

203-7400

Installation route: 小臂销黄油管

Length
1,900 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. 2

187-6692

Installation route: 小臂破碎器截止阀左

Length
1,500 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. 4

121-8662

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

Length
2,650 mm
Specification
DN6;-4;10.3Mpa
Left fitting
美制锥形外螺纹
Right fitting
美制锥形外螺纹30°内锥
View full repair specifications

Diagram Pipe No. 26

486-0125

Installation route: 大臂(快换)~快速联轴阀(液压油箱后上)

Length
2,250 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. 3

4I-3988

Installation route: 行走踏板~分配阀

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. 3

178-5955

Installation route: 液压泵~液压泵

Length
610 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
View full repair specifications

Diagram Pipe No. 1

4I-1095

Installation route: 小臂油缸

Length
775 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. 25

486-0122

Installation route: 大臂(快换)~快速联轴阀(液压油箱后上)

Length
2,190 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. 3

121-8659

Installation route: 大臂油缸黄油管右

Length
2,000 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. 31

199-1914

Installation route: 分配阀下~电磁阀(分配阀后下)

Length
370 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. 2

124-0838

Installation route: 铲斗油缸左(2.5M)

Length
1,300 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. 2

4I-6003

Installation route: 电磁阀(分配阀后)~驾驶室

Length
2,650 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. 2

277-0917

Installation route: 小臂破碎器截止阀左

Length
1,900 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. 17

285-2719

Installation route: 电磁阀(分配阀后)~

Length
2,850 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

104-8950

Installation route: 分配阀上~减压阀(分配阀右后)

Length
1,200 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. 15

7Y-4199

Installation route: 中转接头~分配阀下右

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. 2

123-2729

Installation route: 铲斗油缸左(3M)

Length
1,660 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. 17

104-8973

Installation route: 回转马达~蓄能器电磁阀(液压泵旁左)

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. 13

7I-8252

Installation route: 行走踏板~分配阀

Length
2,350 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. 3

4I-3988

Installation route: 中转接头~分配阀上右

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. 11

275-1538

Installation route: 中转接头~模式转换阀

Length
520 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. 7

187-7173

Installation route: Boom cylinder — left 2 / left 3Original Chinese: 大臂油缸左2/左3

Length
780 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. 1

177-8506

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. 39

307-4969

Installation route: 分配阀下~过渡接头(分配阀后下)

Length
380 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

337-1286

Installation route: 大臂(快换)~压力传感器(分配阀前)

Length
860 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. 4

269-9714

Installation route: 液压油箱~液压油过滤器

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. 7

203-7401

Installation route: 大臂油缸黄油管左

Length
2,100 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. 4

4I-5900

Installation route: 分配阀下~减压阀(分配阀右后)

Length
900 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

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®312D2 GC?

The current published data covers 12 systems and 37 hose records. Systems with more listed records include: Control Lever (7 hoses), Control Valve (5 hoses), Boom Assembly (5 hoses), Attachments – Quick Coupler (5 hoses), Grease Lines (4 hoses), Attachments – Breaker (3 hoses).

What is the hose length range for Caterpillar CAT®312D2 GC?

Based on published records with valid lengths, the range is 370–2,850 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312D2 GC?

The most frequent raw specifications in the current published records are: DN10;1SN-6;10.4Mpa (10 records), DN10;-6;10.3Mpa (7 records), DN19;6SH-12;42Mpa (5 records), DN16;6SH-10;42Mpa (4 records), DN6;-4;10.3Mpa (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®312D2 GC?

Each record keeps the left and right fitting descriptions separate. Current examples: 108-7360: left American female thread, flat-face seal; right American female thread, flat-face seal; 4I-3994: left American female thread, flat-face seal; right American female thread, flat-face seal; 4I-1037: 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®312D2 GC hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 18 (108-7360), Pipe No. 3 (4I-3994), Pipe No. 16 (4I-1037), Pipe No. 17 (104-8973). 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®312D2 GC 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-174-312d2-gc--43415426233137343b3331324432204743/

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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