Hydraulic line repair data
Current system
Use the number on the diagram, a part number, connection point, length, hose size, or fitting.
Hose repair details
Diagram Pipe No. 22
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 4
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 21
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 25
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 1
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 5
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 20
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 16
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
Diagram Pipe No. 19
Installation route: Intermediate adapter → control valveOriginal Chinese: 中转接头~分配阀
No hose in this list matches those words. Clear the box or search another machine.
Workshop guide
For Caterpillar CAT®319D 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.
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: 111-6752: left 90° elbow, American female thread, flat-face seal; right American female thread, flat-face seal; 4I-3988: left American female thread, flat-face seal; right American female thread, flat-face seal; 236-2844: left 45°美制内螺纹平面密封; right American female thread, flat-face seal. Open the exact part-number or pipe-number record; do not swap ends based on appearance alone.
Yes. Current examples with a diagram pipe number are: Pipe No. 22 (111-6752), Pipe No. 4 (4I-3988), Pipe No. 17 (236-2844), Pipe No. 21 (104-8976). Open a record to compare its installation position with the linked manual page.
