I agree with discopete. The worm diameter increases in both side in such a way that the contact is maintained in all the angles

Excellent video ! Thanks very much

Thanks for this one Mike, still rebuilding my 90 onto its new chassis. Getting there but having problems with indicators and wipers. Will get there in the end. Keep them coming Mike, really informative and enjoyable vids.

Something else I just learned after all these years, cheers Mike.

Thanks, mike👍 I’ll show this to my MOT man! Every year he advises about play in the steering when there’s nothing at all in the straight ahead position😂

Thanks!

Esoteric mechanical insights and marvels...

The worm gear doesn't have parallel sides, they are concave to allow for the contact with the wheel

Mine just failed MOT aim excessive movement in the steering. Trawled through your playlists and here it is. I’ll give this a try tomorrow. Good demo on the board as well. 👍🏻

Another question answered. Thanks Mike.

Once again brilliant explication.

Brilliant!

I love how you class string as sophisticated equipment!! However I did notice it was red in colour, I hope it wasn't a Snap-on ball of string you are using or I may have to go back to watching Netflix!!

Great explanation. Can you do a full video on the steering death wobble and possible ways to sort it out.

Abosolute gold these vids. Very informative 👍

...am I the only one who thought initially that the string was fluid piddling out of the back?

Hello I am the owner of a Discovery 1 and a Jaguar MK10 with 420 power steering. I follow with very much interest your channel. But in the case of the Adwest power steering box play I could not fully agree. The steering worm is not from a constant diameter. The diameter varies. Minimum in the center and increasing to both sides, in such a way that the wheel in the steering arm maintains a constant distance with the worm gear. In adittion the gear ratio varies the steering id slower in the central position and faster in both sides. I wonder how the designers in the sixties could desing such a piece without any kind of CAD

yes, I have a Burman steering box that leaks.

So when there's there's a lot of slack in the straight ahead position movement on the steering wheel and the nut with the alan key is turned in as far as it goes with out it being forced down there is still slack does that mean it's too worn on the worm screw and a new box is now the only option

Hi Mike. When you adjust the nut, is it necessary to have the front wheels of the ground, jacked up?

Hi Mike. Great videos by the way my drop arm has just started to leak fluid is there excess pressure buils up when on full lock and is that the reason for the leak. It was fine and i'm doing some restoration work on it (Disco 1 V8 ) so have to keep moving it in and out of the workshop. The thing is it just started leaking today is this cause by pressure build up getting in and out of the workshop. TIA Andy.

hello I’ve got a quick question for you there’s movement in my steering wheel even though I’m not turning the corner is driving straight excessive movement would you say the steering box is no good excessive movement even when it’s parked up not running does the box need adjusting I’ve tried to adjust the box but it seems like it’s binding any help would be much appreciated thanks

Even us as the back of the class understood that

My disco 2 has a lot of play in the steering. 210000 miles. You reckon adjustment make any difference or needs a new steering box?

I'd imagine that there would be more engagement points from the worm gear to shaft instead of just one,like a daisy with slotted petals? Are any other steering boxes retrofitable?

Q, what's happened to the Range Rover classic project Mike??? Is it still at the paint shop.....🤔

I have a blog and it includes this page on rebuilding a Series steering box. The worm gear, main nut and rocker shaft arrangement are very similar to the Adwest box and it has the same play at each side, and is also susceptible to damage if adjusted offset. The photos of the internal parts may help your explanation. I think the play is specifically the main nut travelling along the slot of the rocker shaft fork at full lock, not the length of the nut from the rocker shaft axis (that length increase ought to decrease radial play if other factors weren’t present): www.nickslandrover.co.uk/steering-box/

Those are expense boxes I heard