- Length
- 3,600 mm
- Specification
- DN6;1SN-04;22.5MPa
- Left fitting
- 美制内螺纹74°内锥
- Right fitting
- 美制内螺纹74°内锥
Individual hose record
4257291 Hose Repair Specifications
Excavator · Hitachi · ZX370 · Grease Lines
Finished length3,600 mm
Locate this hose
Installation diagram — Pipe No. 12
Locate Pipe No. 12 in the diagram, then confirm part number 4257291 before removing the hose.
Repair specifications
- Part number
- 4257291
- Diagram pipe number
- 12
- Installation route
- 大臂油缸黄油管
- Hose specification
- DN6;1SN-04;22.5MPa
- Finished length
- 3,600 mm
- Working pressure
- 22.5 MPa
- Left fitting
- 美制内螺纹74°内锥
- Right fitting
- 美制内螺纹74°内锥
- Quantity
- 1
Same system
Related Hoses
- Length
- 3,650 mm
- Specification
- DN6;1SN-04;22.5MPa
- Left fitting
- 美制内螺纹74°内锥
- Right fitting
- 美制内螺纹74°内锥
- Length
- 3,560 mm
- Specification
- DN5;2层纤维-3;14MPa
- Left fitting
- 美制内螺纹37°内锥
- Right fitting
- 公制卡套式
- Length
- 3,560 mm
- Specification
- DN5;2层纤维-3;14MPa
- Left fitting
- 美制内螺纹37°内锥
- Right fitting
- 公制卡套式
Diagram Pipe No. 23
4407364
Installation route: Right boom-cylinder grease lineOriginal Chinese: 右大臂油缸黄油管
- Length
- 3,400 mm
- Specification
- DN5;2层纤维-3;14MPa
- Left fitting
- 美制内螺纹37°内锥
- Right fitting
- 公制卡套式
Diagram Pipe No. 23
4407364
Installation route: Right boom-cylinder grease lineOriginal Chinese: 右大臂油缸黄油管
- Length
- 3,400 mm
- Specification
- DN5;2层纤维-3;14MPa
- Left fitting
- 美制内螺纹37°内锥
- Right fitting
- 公制卡套式
Diagram Pipe No. 22
4398367
Installation route: Left boom-cylinder grease lineOriginal Chinese: 左大臂油缸黄油管
- Length
- 3,830 mm
- Specification
- DN5;2层纤维-3;14MPa
- Left fitting
- 美制内螺纹37°内锥
- Right fitting
- 90°公制卡套式
Diagram Pipe No. 22
4398367
Installation route: Left boom-cylinder grease lineOriginal Chinese: 左大臂油缸黄油管
- Length
- 3,830 mm
- Specification
- DN5;2层纤维-3;14MPa
- Left fitting
- 美制内螺纹37°内锥
- Right fitting
- 90°公制卡套式
Workshop guide
Finding the correct hydraulic hose for Hitachi ZX370 Grease Lines
Start with the machine and route
For Hitachi ZX370 Grease Lines, 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.
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
- 42572913,600 mm · DN6;1SN-04;22.5MPa · 大臂油缸黄油管
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.
For reference only. Confirm the actual hose before fabrication.