Hydraulic line repair data

Caterpillar CAT®312C L Hose Repair Data

Coverage details

Hoses: 63 records
Full specifications: 63 records
Systems: 12 systems
Length range: 290–3,550 mm

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AttachmentsControl ValvePedalControl LeverBoom AssemblyAttachments – Lock ValveGrease LinesAttachments – Quick CouplerSwivel JointHydraulic Pump

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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. 1

113-6738

Installation route: 小臂油缸锁止阀

Length: 3,100 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

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Diagram Pipe No. 5

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

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Diagram Pipe No. 4

146-1325

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,410 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

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Diagram Pipe No. 57

104-8771

Installation route: 中转接头~分配阀下

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

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Diagram Pipe No. 15

179-7456

Installation route: 行走踏板~中转接头(踏板)

Length: 290 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

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Diagram Pipe No. 30

7Y-4193

Installation route: 行走踏板~分配阀

Length: 2,500 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

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Diagram Pipe No. 3

7I-7122

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,220 mm
Specification: DN25;6SH-16;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

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Diagram Pipe No. 4

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

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Diagram Pipe No. 5

4I-0769

Installation route: 左踏板~

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

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Diagram Pipe No. 10

4I-3991

Installation route: 中转接头(踏板)~分配阀下

Length: 2,100 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

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Diagram Pipe No. 7

104-8973

Installation route: 手柄(推土铲)~控制阀(回转接头右)

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

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Diagram Pipe No. 2

173-7910

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,370 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

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Diagram Pipe No. 41

121-6369

Installation route: 液压泵~液压油过滤器

Length: 950 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

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Diagram Pipe No. 20

179-7778

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

Length: 1,900 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

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Diagram Pipe No. 9

4I-3981

Installation route: 中转接头(踏板)~分配阀上

Length: 2,750 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

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Diagram Pipe No. 8

109-7556

Installation route: 手柄(推土铲)~进回油阀

Length: 450 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

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Diagram Pipe No. 92

7Y-4366

Installation route: 减压阀(分配阀下)~

Length: 750 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

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Diagram Pipe No. 35

110-5499

Installation route: 中转接头~分配阀下

Length: 1,570 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

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Diagram Pipe No. 4

121-8659

Installation route: 大臂油缸黄油管

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

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Diagram Pipe No. 9

199-1657

Installation route: 液压泵~液压泵吸油铁管

Length: 650 mm
Specification: DN25;1SN-16;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. 31

194-0322

Installation route: 回转接头~电磁阀

Length: 2,550 mm
Specification: DN10;1SN-06;18MPa
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. 55

5I-4076

Installation route: 分配阀前~

Length: 1,350 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

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Diagram Pipe No. 11

108-9097

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

Length: 1,520 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

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Diagram Pipe No. 1

4I-5997

Installation route: 大臂(附加装置)~过渡接头(回转接头前)

Length: 950 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

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Diagram Pipe No. 9

193-6559

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,170 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

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Diagram Pipe No. 4

102-1279

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,730 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

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Diagram Pipe No. 31

196-3369

Installation route: Left boom-cylinder lock valve → right boom-cylinder lock valveOriginal Chinese: 左大臂油缸锁止阀~右大臂油缸锁止阀

Length: 1,200 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

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Diagram Pipe No. 9

173-7910

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,370 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

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Diagram Pipe No. 2

198-0401

Installation route: 大臂(快换)~快速联轴阀

Length: 3,350 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

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Diagram Pipe No. 5

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

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Diagram Pipe No. 9

193-6549

Installation route: 大臂(附加装置)~小臂(附加装置)

Length: 1,650 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

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Diagram Pipe No. 4

087-6584

Installation route: 左踏板~分配阀上

Length: 3,200 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

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Diagram Pipe No. 7

108-7203

Installation route: 左踏板~

Length: 2,600 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

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Diagram Pipe No. 28

4I-0772

Installation route: 分配阀上~

Length: 3,550 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

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Diagram Pipe No. 26

194-0328

Installation route: 分配阀下~梭阀(分配阀下)

Length: 360 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. 28

104-8768

Installation route: 行走踏板~分配阀

Length: 2,700 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

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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®312C L?

The current published data covers 12 systems and 63 hose records. Systems with more listed records include: Attachments (21 hoses), Control Valve (9 hoses), Pedal (7 hoses), Control Lever (5 hoses), Boom Assembly (4 hoses), Attachments – Lock Valve (4 hoses).

What is the hose length range for Caterpillar CAT®312C L?

Based on published records with valid lengths, the range is 290–3,550 mm. Open the individual record to verify its installation position and both end fittings before fabrication.

Which hose specifications are common for Caterpillar CAT®312C L?

The most frequent raw specifications in the current published records are: DN10;1SN-6;10.4Mpa (16 records), DN10;-6;10.3Mpa (10 records), DN13;4SP-8;28Mpa (7 records), DN16;6SH-10;42Mpa (5 records), DN19;6SH-12;42Mpa (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®312C L?

Each record keeps the left and right fitting descriptions separate. Current examples: 113-6738: left American female thread, flat-face seal; right American female thread, flat-face seal; 121-8662: left 美制锥形外螺纹; right 美制锥形外螺纹30°内锥; 146-1325: 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®312C L hose by diagram pipe number?

Yes. Current examples with a diagram pipe number are: Pipe No. 1 (113-6738), Pipe No. 5 (121-8662), Pipe No. 4 (146-1325), Pipe No. 57 (104-8771). 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®312C 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-174-312c-l--43415426233137343b33313243204c/

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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Hose Length and Fitting List

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