3. Push the handle down to be certain of locking.
The coupling is fully locked when the handle is fully down and can be pushed no further.
4. Check correct coupling.
■ Check that the coupling handle cannot be pushed further down.
■ Check that the locking indicator is protruding and visible.
The locking indicator is not visible.
➤ Lift the handle and uncouple.
➤ Set the coupling back on the towing vehicle ball hitch and push down.
Checking the ball coupling wear indicator (EU version):
The ball coupling is equipped with a wear indicator.
The wear indicator shows:
■ Wear on the ball hitch.
■ Wear on the coupling.
Fig. 86 Ball coupling wear indicator
1
Ball coupling
2
Wear indicator
+
Green zone (OK)
–
Red zone (wear tolerance exceeded)
WARNING
Danger of accident from worn coupling!
The machine may detach from the towing vehicle.
➤ Do not tow the machine.
➤ Have the ball coupling and ball hitch checked.
➤ Replace worn parts.
1. Couple-up the machine and tow slowly and carefully for about 500 m.
The action of towing sets the coupling mechanism to maximum closure and gives a true reading
on the wear indicator.
12 Decommissioning, Storage and Transport
12.2 Transport
No.: 9_9425 01 E
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
161
