Preparation and setup
40
6.1.4
Ball head coupling
The ball head coupling must only be coupled with an
approved coupling ball 80 (ball diameter 80 mm) that is
suitable for ensuring safe attachment and locking.
Fig. 25
:
Ball head coupling
Maintaining the ball head coupling:
-
Grease the contact surfaces at the coupling point.
-
Ensure that the mounting bolts of the ball head coupling are securely fastened.
-
Replace loose screws and nuts (tightening torque less than 120 Nm) with new ones.
-
Replace the ball head coupling if damaged, deformed or worn.
-
Check the function of the ball head coupling.
-
Replacement to be carried out by qualified specialists only.
6.1.5
Installing forced steering on the towing vehicle (optional)
The forced steering is optional additional equipment, which the customer must adapt individually to each
towing vehicle. This means that the settings must be re-adapted every time the towing vehicle is
changed.
The towing vehicle must feature a suitable coupling mechanism for this purpose.
On TANDEM models, the rear axle features forced steering. Hydraulic forced steering is only available
for bottom attachment with a Ø 80 mm flange ball head coupling. The dimensions on the Ø 80 ball head
coupling and the clearances according to ISO 500 and ISO 730 must be applied.
Procedure
Mounting of the steering cylinder at the same
axial and vertical height as the ball head coupling
on the towing vehicle (tractor) with 250 mm
clearance (
5 mm).
Fig. 26
:
Installation layout for forced steering
-
The towing vehicle requires a suitable coupling mechanism.
-
At maximum steering angle, the tyres must not touch the frame or other
parts of the vehicle.
-
Check the axle stops and adapt them to the tyre size if necessary.
-
At maximum steering angle of the hydraulic cylinders with coupling (52°),
ensure sufficient space from the panelling on the outside and from the
flange coupling on the inside.
-
The cylinder protection (on the side of the traction bar) must be checked
and adjusted for every towing vehicle type; if necessary, double the cylinder
protection until the wheels of the towing vehicle (tractor) make contact at
maximum steering angle.
