Frequently Asked Questions (FAQ)

General Information

Which information are required for technical inquiries?


Serial No. / Model No. / Year of manufacture 

Where do you find this information?


All HYDRO products have a type label where the information is engraved.

Who can help me with my technical inquiry?


E-Mail: technical-support ( at ) hydro.aero

Phone: +49(0)7835 787-0 


Maintenance / Re-calibration

What HYDRO’s re-calibration intervals are recommended by HYDRO?


How often should I check or exchange tow bar shearpins?


What has to be considered when exchanging tow bar shearpins?


What type of hydraulic oil can be used with HYDRO products?


Our products are filled with the following hydraulic oil:
ESSO UNIVIS HVI 13 befüllt.

When using different hydrualic oils, the following specifications have to be fullfilled:

HV-Hydraulic oil on the basis of mineral oil according to ISO 6743/4

Viscosity class

ISO VG 15

Viscosity index, AMST D 2270

> 370

Pourpoint, °C, ASTM D 97

< - 60

Burning point, °C, ASTM D 92

> 101

Copper corosion, ASTM D130

1A

Advise:

  • The hydraulic oil we use contains zinc
  • Mixing of different hydraulic oils is not allowed

Does HYDRO recommend a special lubricant for greasing hydraulic cylinders?


HYDRO recommends to use the following lubricant:
FIN LUBE, manufactured by Interflon (www.interflon.com).


Hydro Systems

Where can I get local support for my products?



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