Individual hose record

4I-3778 Hose Repair Specifications

Excavator · Caterpillar · CAT®312-A · Control Valve

Finished length820 mm

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Installation diagram — Pipe No. 11

Locate Pipe No. 11 in the diagram, then confirm part number 4I-3778 before removing the hose.

Caterpillar CAT®312-A installation diagram showing hydraulic hose 4I-3778 at Pipe No. 11
Caterpillar CAT®312-APart 4I-3778 · Pipe No. 11Open full-size diagram

Repair specifications

Part number
4I-3778
Diagram pipe number
11
Installation route
分配阀上~先导阀(分配阀左前)
Hose specification
DN10;-6;10.3Mpa
Finished length
820 mm
Working pressure
10.3 MPa
Left fitting
美制内螺纹37°锥
Right fitting
美制内螺纹37°锥
Quantity
1

Same system

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Installation route: 分配阀前~回转马达

Length
1,150 mm
Specification
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Left fitting
美制内螺纹37°锥
Right fitting
美制内螺纹37°锥
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Diagram Pipe No. 8

4I-3778

Installation route: 分配阀上~分配阀下

Length
820 mm
Specification
DN10;-6;10.3Mpa
Left fitting
美制内螺纹37°锥
Right fitting
美制内螺纹37°锥
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Diagram Pipe No. 53

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Installation route: 分配阀下~

Length
1,470 mm
Specification
DN6;-4;19.2Mpa
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. 56

7I-0184

Installation route: 分配阀下~分配阀下

Length
550 mm
Specification
DN10;-6;10.3Mpa
Left fitting
美制内螺纹37°锥
Right fitting
美制内螺纹37°锥
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Diagram Pipe No. 29

7I-0181

Installation route: 分配阀上~分配阀下

Length
1,250 mm
Specification
DN10;-6;10.3Mpa
Left fitting
美制内螺纹37°锥
Right fitting
美制内螺纹37°锥
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Diagram Pipe No. 53

103-1348

Installation route: 分配阀下~蓄能器电磁阀(液压油箱后)

Length
1,470 mm
Specification
DN6;-4;19.2Mpa
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

4I-6349

Installation route: 分配阀上~阀块(分配阀前)

Length
1,000 mm
Specification
DN10;-6;10.3Mpa
Left fitting
美制内螺纹37°锥
Right fitting
美制内螺纹37°锥
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Diagram Pipe No. 29

7I-0181

Installation route: 分配阀上~分配阀上

Length
1,250 mm
Specification
DN10;-6;10.3Mpa
Left fitting
美制内螺纹37°锥
Right fitting
美制内螺纹37°锥
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For reference only. Confirm the actual hose before fabrication.

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