Hydraulic Hose Weeping

Hydraulic hose

STRONGFLEX is one leading professional manufacturer and exporter of Wire Braided and Muti-Spiraled Hydraulic Hoses, such as SAE100R1AT/DIN20022 EN853 1SN, SAE100R2AT/DIN 20022 EN853 2SN, DIN20023 EN856 4SP, 4SH, SAE100R5, SAE100R9, SAE100R10, SAE100R12, SAE100R13, SAE100R15, Steam Hoses, Air Hoses and other industrial hoses.

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It would help if you posted what material you tried. Even with Mobil DTE you have to make sure that the hose inner liner material is compatible with the fluid. It should be unless you used EPR. Also that the specific hose is rated for the pressures you are using. Note that using too high a pressure rating is not good if you force the hose into tight bends that damages the hose. Also make sure that no one is running over the hose.

We too are having the same problem on our hydraulic equipment. Our hydraulic power unit runs at a pressure of 3000 psi (207 bar) on Mobil DTE 25 and the oil temperature is 45°C and has been in constant operation for the last year (24 hours a day, 7 days a week).

We are using Parker 351TC which has a constant working pressure rating of 4000 psi (275 bar) which leaked after 1 year of use, twice (the hoses were replaced once already).

Did you ever find a solution to the problem?

In our case, the manufacturer Parker suggests switching over to a 575X hose with a nylon inner tube (claims the synthetic rubber inner tube is the cause), but I'm not sure if I believe the reason since the 351TC indicates it is designed for a 'constant' working pressure of 4000 psi.