The ball coupling is coupled correctly, when:
■ the locking latch at the coupling handle is released
■ the cylinder of the locking indicator is protruding and visible
Fig. 95 Ball coupling (ALKO)
1
Coupling handle
2
Ball coupling
3
Towing vehicle ball hitch
4
Safety lever (locking latch release)
5
Locking latch (released)
6
Locking indicator (protruding)
1.
There is considerable danger of injury caused by trapped fingers.
They can be trapped in the spring-loaded closing mechanism.
➤ Never place your fingers inside an open ball coupling.
➤ Always wear protective gloves.
2. Fully push the safety lever
4
and pull up the coupling handle of the ball coupling.
The coupling opens.
3.
Risk of accident due to unhitching of the ball coupling during transport.
If the coupling is not fully closed the compressor can become uncoupled from the towing vehi‐
cle and cause an accident.
➤ Check correct coupling.
4. Place the open coupling over the towing vehicle ball hitch.
The weight on the coupling will cause it to audibly close. The coupling locks automatically.
Closing and locking is automatic.
5. Manually push down the coupling handle until the locking latch releases and the cylinder of the
locking indicator is pushed through the towing device and becomes visible.
6. Check correct coupling.
■ Check that the coupling handle cannot be pushed further down.
■ Check that the locking latch has released.
■ Check that the locking indicator is protruding and visible.
Locking latch is not released and/or cylinder of the locking indicator is not visible.
➤ Lift the safety lever and pull the coupling handle forward then lift the coupling slightly.
➤ Set the coupling back on the towing vehicle ball hitch and forcibly push down at the cou‐
pling handle.
Checking the ball coupling wear indicator
The ball coupling is equipped with a wear indicator.
12 Decommissioning, Storage and Transport
12.2 Transport
264
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
No.: 9_9570 07 USE