Valtra T144 Operator's Manual page 242

3. Operation
1
GUID-6527CD59-5E91-4718-8CDD-58C610BA92A7
1. Lever
1. Pull the lever upwards and turn it to the anticlockwise.
2. Move the jaw to the wanted height.
3. Release the lever.
The locking pins lock the lever to the correct position with the help of the
returning springs.
You can also lift the jaw away from the frame by using the same lever.
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