Hydraulic line repair data
Current machine
Use a system name, the number on the diagram, a part number, connection point, length, hose size, or fitting.
Hose repair details
Hose record
Installation route: Installation route — English review pendingOriginal Chinese: 回转马达—油箱铁管
No hose in this list matches those words. Clear the box or search another machine.
Digitized data and source sheets
The table is a searchable transcription of the Hitachi ZX250H-3G workshop notes. The complete original handwritten sheets are shown below without cropping.
| Part number | Recorded length |
|---|---|
| 4453023 | 850 mm |
Complete pages are shown in their original proportions without cropping.
Workshop guide
For Hitachi ZX250H-3G, 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.
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.
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.
Based on current published data
Questions appear only when a published record or linked PDF page provides the answer.
Based on published records with valid lengths, the range is 850 mm. Open the individual record to verify its installation position and both end fittings before fabrication.
The most frequent raw specifications in the current published records are: 10I（手写管线代码） (1 records). Verify the specification together with length, pressure, and fitting details.
Each record keeps the left and right fitting descriptions separate. Current examples: 4453023: left Fitting type — English review pending; right Fitting type — English review pending. Open the exact part-number or pipe-number record; do not swap ends based on appearance alone.
