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: 先导泵—先导滤芯
Hose record
Installation route: Installation route — English review pendingOriginal Chinese: 先导泵—回油铁管
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 ZX270-3 workshop notes. The complete original handwritten sheets are shown below without cropping.
| Part number | Recorded length |
|---|---|
| 10028A | 750 mm |
| 4304464 | 950 mm |
| 4644625 | 680 mm |
| 9255948L | 1,170 mm |
| 9255963J44629062 | 1,450 mm |
Complete pages are shown in their original proportions without cropping.
Workshop guide
For Hitachi ZX270-3, 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.
Each record keeps the left and right fitting descriptions separate. Current examples: 4304464: left Fitting type — English review pending; right Fitting type — English review pending; 4644625: 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.
