turning circle

I'm not sure it is possible. turning cycle is limited with frame, and changing steering box arm with longer may let tires toch frame

 

You may be able to adjust them in a long way. You want to make sure the tires dont rub anything and that you are not against the internal stop in the steering box.

 

I don't know which steering gear you have on your truck but, you need to be carefull adjusting the stops. There are poppet valves in a steering gear that are designed to start to open near full lock and continue to open up until the knuckle contacts the stops. The poppets are designed to bleed off the hydraulic pressure in the steering gear. (basically a pressure relief) As you turn the stops in, the gear travels further than the previous set point therefore moving the poppets. The problem arrises when you go to far and have to turn the stops back in alittle. Now the knuckle hits the stop before the gear bleeds off the pressure built up in the box. Depending on which box you have, some are resettable and some require a overpriced special little bolt kit to reset them! Hope this helps.

 

i pulled the stops completely out of my old 2000 t600 and never had a problem...it help a little on the turnin.

 

Had an International cabover once and adjusted the stops as far as they would go. It was worth it, the fleet that had owned it turned them out and the tractor had a really wide turning radius. Tight turns are one of the advantages of a short wheelbased cabover.

 

yeah, european coe trucks are all with small turning cycle, but long wheel base trucks are better on highway

 

Sorry to bump an old thread, but this exact topic is something I've just been dealing with on some twin-steer, tri-drive drill rigs.

Just be aware when you're winding out the stops not to just check clearances on flat and level ground. You need to consider clearance to brake lines, chassis rail and steering components at every combination of bump, roll and steering.

In practice, if you've got access to either a big forklift or an overhead gantry crane, you can get a reasonable idea by lifting one tyre at a time.