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Not all Chines made equipments are genuine metric, such as this adapter on our LW-7 (LW7U10) backhoe. The hydraulic oil tank thread is 3/4" UNF, while the return hose from the valve block is metric M18x1.5. (Note: Unfortunately the obligatory O-ring is missing in this picture).As you can see, it is derived from ORFS, but in metric and with the inner wall removed. Therefore, it's no inner edge preventing eg. a broken o-ring from enter into the pipe. The fittings are very compact, very reliable, repeatable and easily leak-proof, carrying some of the advantages from the ORFS standard. The only problem is that very few or almost zero hydraulic shops (outside of China) can help you making a spare hose.It's the importers that are to be blamed, if not carrying a stock with adapters or ideally these metric hose fittings for crimp attachments. Each delivered backhoe should be supplied with a pair of adapters for M14x1.5, M16x1.5, M18x1.5, M22x1.5, in order to overcome the most acute hose problems. If not able to live up to that modest requirement, rather specify JIC or BSB fittings to enter the western world for all Chinese made backhoes, and leave those exotic fittings for the China market only. The western world have enough pipe and hose standards already is the message I often face, when trying to get a custom hose made in a hydraulic hose shop. Fortunately, the importers of Jinma and Foton and Chinese backhoes are very helpful in our country.However, the importers do sell spare hoses of the same part number, which is fine if you're not into modifying your backhoe yourselves.You might want to increase the area of some hoses, since adding a spin-on tank return filter. Maybe adding an extra hydraulic function for a thumb, or an extra function for a hydraulic tiltable planning bucket.However, there aren't that many product numbers that needs to be imported and stored (preferably at a hose services in cooperation with the backhoe importer):It seems that thesesbelong to the national standards:andwhich can be found at:
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