Lukas P 640 TG - Manual (Page 19)

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The equipment is connected to the hydraulic pump via quick-disconnect coupling halves
(male and female).
Before coupling, remove the dust protection caps, then pull back and hold the locking sleeve
of the female coupling (position X). Connect the nipple and female coupling and let go of the
locking sleeve. To conclude, turn the locking sleeve into position Y. The connection is now in
place and secure. Uncouple in reverse order.
WARNING / DANGER / CAUTION!
Some quick-disconnect couplings have special functions. Therefore it is not
permitted to screw them off the hoses or to swap them!
X
Y
To protect against dust, the accompanying dust protection caps must be replaced.
REMARK:
Coupling of the devices is only possible when the hoses are depressurised.
7.2 Coupling the quick-disconnect couplings
CAUTION!
Always couple the return hose first and then the supply hose!
On disconnecting, you should always disconnect the supply line first and then
the return pipe!