It should turn left and right with the rudder movement. As mentioned before, a quickie connector is acceptable on the pushrod for steering a tri-gear airplane. You can use one on both ends if you wish but a Z-bend at the steering arm is more reliable. The quickie connector at the servo allows for easy adjustment of the wheel. Movement of the wheel should be just enough for a wide turn.
Small movement makes it easier to steer during take-off and landing.
It usually is best to have the steering wheel slightly shorter than the main gear. That helps to avoid hitting it first during landing. Finally check the main gear to see that it is well fastened to the fuselage. A slight toe-in of the main wheels will help the plane to track straighter down the runway. Check the throttle connections and movement.