On tractors the steering box set level thus 90 wt oil was used originally. Later on it was changed to 140 wt gear oil because the 90 wt wounden't stay in. 140 wt doesn't stay in all that well either. When used on automobiles the steering box was most alway's mounted at an angle. That pretty much ruled out oil. 00 grease was used instead. Used to come in 5 gal buckets and was greased via the grease zerk every time you greased all the other zerks on the car. That grease wasn't used in any other fitting around here.
What you will find if you use regular grease is after you turn the wheel back and forth a few times the grease is pushed to the ends where it builds up and stay's. The pin will then be dry where it rides in the worm making steering difficult and will destroy the pin and worm pretty quick when used. I rebuilt one and destroyed it in one summer on my tractor doing just that. 00 grease cartridges are available at John Deere and New Holland dealers - (cornhead grease). I'm sure you could find it at other places as well. That grease is thinner and stay's pliable so everything inside stays slick.
I set the pin by turning the wheel all the way left of right and screwing it in all the way with a small screwdriver and then back it off just a hair and lock it down. Pretty much the same as wheel bearings. Raise the front end and turn the wheel with one finger thruought it's travel. If it's too tight back it out a hair more and if it's too slack in a tad.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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