Lukas P 640 TG - Manual (Page 35)

35
12.3.5 Replacing hoses
Replace hoses if they are leaky or defective, and if they are older than 10 years. To replace
the hoses, undo the union nuts of the hose connections, remove the hose to be replaced
and replace it with a new hose. Tighten the union nut during the assembly with a torque of
M
A
= 40 Nm.
REMARK when using mono-couplings:
If you want to replace the hoses, you have to dismantle the mono-couplings
(if mounted).
CAUTION (with mono-coupling-system)!
As the case may be, make sure that port 'T' or 'T1' of the unit is always connected
to port 'T' of the mono-coupling.
12.3.3 Quick-disconnect couplings
The quick-disconnect couplings must be replaced in the event of:
- external damage
- the locking device not working
- hydraulic fluid continually leaking in a coupled/uncoupled state.
WARNING / DANGER / CAUTION!
Never repair couplings: they are to be replaced by original LUKAS parts!
Procedure when mounted on hoses:
1. Loosen the union nut of the hose assembly and remove the coupling.
2. Position the new coupling and tighten the union nut of the hose assemblies
with a torque of M
A
= 35 Nm.
Procedure when mounted into the valve block:
1. Remove the coupling from the valve block.
2. Position the new coupling and tighten it with a torque of M
A
= 40 Nm.
12.3.4 Direct connection
The screw-in sleeves must be replaced in the event of:
- external damage
- hydraulic fluid continually leaking in connected / unconnected state.
Procedure:
1. Remove the screw-in sleeve from the valve block.
2. Position the new screw-in sleeve and tighten it with a torque of M
A
= 40 Nm.