Agricultural vehicles. Mechanical connections on towed vehicles - Dimensions for hitch-rings1 Scope This part of ISO 5692 specifies the requirements for the attachment of agricultural non balanced trailers and implements by means of hitch rings having a 50 mm hole centre and 30 mm ring diameter to the rear of a towing vehicle equipped with either a hook in accordance with ISO 6489 1 or a piton type coupling as specified in ISO 6489 4. Its purpose is to ensure the interchangeability of mechanical connections on agricultural towed vehicles.

Components Constant upstream pressure test Variable upstream pressure test ISO 6358‑1 constant upstream pressure test ISO 6358‑2 charge test ISO 6358‑1 variable upstream pressure test ISO 6358‑2 discharge test Group 1 Directional control valves yes yes yes yes Flow control valves yes yes yes yes Connectors yes yes yes yes Valve manifolds yes yes yes yes Group of components yes yes yes yes Group 2 Filters and lubricators yes no no no Non-return (check) valves yes no no no Quick-exhaust valves yes no no no Tubes and hoses yes no no no Group 3 Silencers and exhaust oil mist separators no no yes yes Blow nozzles no no yes yes Cylinder end heads no no yes yes

A test method for the efficiency of the fluid filter has been added

IGUs are designed to reduce heat loss and solar heat gain entering the building

It should contribute to avoiding risks to the child

ISO 23145-2 lays down the technicalities for carrying out a test procedure to determine the untapped density of the ceramic powders

The sections on functional tests

• Expression of results

and transfer functions

Note 2: BS EN 1034-7 does not apply to tanks for chemicals

or a control centre application

high strength steels

Note 2: ISO 21406 does not cover risks in case of abnormal weather conditions above wind force 9 on the Beaufort scale