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1) 
Introduction 
The steer system works through a low pressure, four line, self contained hydraulic circuit, with a back up reserve accumulator. As the tractor unit turns left or right the font steer rams are activated which in turn move the rear rams, which steer the rear axle.
 
2) 
Basic Information 
A: The wedge 
B: The hydraulic system indicators
C: Steering alignment 
D: Advice and warning 
E: Steering maintenance

A: The Wedge 
Always make sure the wedge is fully adjusted up into the slot in the 5th wheel plate.
 
To adjust Using a 24 mm (15/16") spanner, slack the 2 bolts under the wedge plus the lock nut on the adjusting screw.
(See fig 1). 

FIG 1

Screw in the adjusting screw until the wedge is just fully engaged in the slot with no clearance at either side. (see FIG 2)

FIG 2

Do not over tighten as it is very difficult, if not impossible; to couple or uncouple the trailer.
When adjustment is correctly completed, tighten lock nut and the 2 bolts under wedge. (see FIG 1)

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