Individual hose record
Excavator · Hitachi · EX270LC-5 · Control Lever
Hose repair card
Hitachi EX270LC-5Pipe No. 12 · Part 4355417
Left fittingAmerican female thread, 37° internal cone seatJIC 37° · 0°View real fitting photos ↗
Right fitting90° elbow, American female thread, 37° internal cone seatJIC 37° · 90°View real fitting photos ↗
RouteIntermediate adapter → upper control valve
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Same system
Diagram Pipe No. 5
Installation route: Intermediate adapter → upper control valveOriginal Chinese: 中转接头~分配阀上
Diagram Pipe No. 46
Installation route: Intermediate adapter → upper control valveOriginal Chinese: 中转接头~分配阀上
Diagram Pipe No. 3
Installation route: Intermediate adapter → lower control valveOriginal Chinese: 中转接头~分配阀下
Diagram Pipe No. 36
Installation route: Intermediate adapter → upper control valveOriginal Chinese: 中转接头~分配阀上
Diagram Pipe No. 29A
Installation route: Installation route — English review pendingOriginal Chinese: 模式转换阀~接线板(中转接头)
Diagram Pipe No. 28
Installation route: Pattern-change valve → intermediate adapterOriginal Chinese: 模式转换阀~中转接头
Diagram Pipe No. 34
Installation route: Pattern-change valve → intermediate adapterOriginal Chinese: 模式转换阀~中转接头
Diagram Pipe No. 23
Installation route: Installation route — English review pendingOriginal Chinese: 模式转换阀~接线板(中转接头)
Workshop guide
For Hitachi EX270LC-5 Control Lever, 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.
Optional cross-check
The question is already written for this machine or hose. Use a tool with web search enabled; treat its answer as a starting point and verify on the machine.
I am checking hydraulic hose repair information for "4355417 Hydraulic Hose Replacement Specifications". 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/hoses/hose_c88a4b9b26c960f196ffcdbd/ HoseSeek currently shows: part number: 4355417; diagram pipe number: 12; installation route: Intermediate adapter → upper control valve; hose specification: DN10;1层纤维-6;14MPa; finished length in millimetres: 1550; left fitting: American female thread, 37° internal cone seat; right fitting: 90° elbow, American female thread, 37° internal cone seat. 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.
For reference only. Confirm the actual hose before fabrication.
