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DRAWING 5.5A CONDUIT CONNECTIONS
(1) rubber seal, (2) security cover
It is recommended that seals are preserved with silicon preparation, specified for rubber
elements every six months. Contact of the seals with fuel, lubricants being petroleum
derivatives, paints etc., causes rapid ageing of the material from which they are made.
Connection should be inspected every time before connecting trailer to tractor. During
connection make sure that tractor socket is not damaged and is maintained in the due
cleanliness.
5.5 HYDRAULIC SYSTEM OPERATION
Always adhere to the principle that the oil in the trailer hydraulic system and in the tractor
hydraulic system are the same type. Application of different types of oil is not permitted. In a
new trailer system is filled with HL32 hydraulic oil.
The hydraulic system should be completely tight sealed. Checking tightness of hydraulic
system consists of connecting machine with tractor and starting hydraulic cylinder rams and
holding them in position of maximum extension for a period of 30 seconds. In the event of
confirmation of an oil leak on hydraulic conduit connections, tighten connections, and if this
does not remedy faults then it is necessary to change conduit or connection elements. If oil
leak occurs beyond connection, the leaking conduit system should be changed. Change of
5.9
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