Fliegl ULW - Check before start-up

ULW transfer trailer
Preparation and setup
Fliegl Agrartechnik GmbH, 84453 Mühldorf am Inn, Germany
38 of 85
6.2 Forced steering (optional)
Adjusting and venting the forced steering (working operation).
The forced steering is pre-fitted to the trailer vehicle and must be adapted to the relevant towing vehicle
by the user (see also section 6.1.2).
Prerequisites
Hitch the trailer to the towing vehicle (tractor) via the flange coupling.
Installation as described in section 6.1.2; establish the hydraulic connection to the towing vehicle (SVK
plug connection). The tractor/trailer combination must be positioned in a line.
Procedure
Setting up the system
1. Position the vehicle in a line
(all wheels must be straight)
2. Connect the steering cylinders to the towing
vehicle
3. Establish the hydraulic connection to the vehicle
4. Open stopcocks L1 and L2
[as well as L3 and L4 on tridem models] (must
be opened before travel to avoid damaging
the hydraulic cylinders)
5. Open stopcocks 1, 2 and 3
[as well as 4 and 5 on tridem models]
6. Apply a pressure of 50 bar to the system
7. Close stopcock 1
8. Close stopcocks 2, 3 [4, 5] one after the other
9. Check whether the forced steering is functioning
correctly at full steering lock
10. If not, there may be air in the system
Venting the system:
1. If there is air in the system: Vent via the sealing
cap and the screw joint on the hydraulic cylinder
2. Open stopcocks 1-3 [4+5]
3. Flush the system with a pressure of approx. 30
bar, until no more air escapes
(use a collecting vessel)
4. Close stopcocks 1-3 [4+5]
5. Check whether the forced steering is functioning
correctly at full steering lock
Fig. 28: Forced steering valves (tandem)
Fig. 29: Steering axle with forced steering
connection
Note: The system is filled in the factory.
Open Closed
1
2
3
Pressure
gauge
Steering axle
stopcock
B
A
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