Individual hose record
Excavator · Hitachi · EX120-5 · Attachments – Lock Valve
Hose repair card
Hitachi EX120-5Pipe No. 61A · Part 4370733
Left fittingAmerican female thread, flat-face sealFITTING · 0°View real fitting photos ↗
Right fittingAmerican female thread, flat-face sealFITTING · 0°View real fitting photos ↗
Route铁管(锁止阀)~回油铁管(分配阀)
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Same system
Diagram Pipe No. 11
Installation route: Left boom-cylinder lock valve → right boom-cylinder lock valveOriginal Chinese: 左大臂油缸锁止阀~右大臂油缸锁止阀
Diagram Pipe No. 11
Installation route: Left boom-cylinder lock valve → right boom-cylinder lock valveOriginal Chinese: 左大臂油缸锁止阀~右大臂油缸锁止阀
Diagram Pipe No. 18
Installation route: Left boom-cylinder lock valve → right boom-cylinder lock valveOriginal Chinese: 左大臂油缸锁止阀~右大臂油缸锁止阀
Workshop guide
For Hitachi EX120-5 Attachments – Lock Valve, 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.
For reference only. Confirm the actual hose before fabrication.
