17a steering issue

First thing is have you checked the oil in the steering booster? If that's ok then proceed to
Right side doesn't steer could mean steering clutch doesn't release.........

Test by pulling both steering clutches at the same time (can you still do that with a 17A?) If the tractor stops, then your right steering clutch is releasing and your brake isn't working properly. If the tractor turns to the left when you pull both clutches back, then right side clutch isn't releasing.

Have you adjusted the steering clutches?

If brake problems are indicated by the above test, then have you adjusted those?

If you don't put oil in it, you don't have a steering booster😆

AFAIKnow, D6 8/9u and D7 3t/4T had the same hydraulic booster underneath the seat. I know they all used the same steering clutches and brakes etc. The D7's just have an additional reduction in the final drive.

I'm confident your 17A has a similar version. Look underneath the tank from the back and see if there isn't a hex socket plug there to check/fill it.

having gracefully avoided tapdancing in a minefield, here i go again. my 17a 1101c is reportedly used by a gentleman on a massive 6 day project and he rested on the 7th. it does not have a steering booster. HOWEVER, having dug out my books and did some reading, there is a serial number break which machines above has the booster.
on my antique, the levers need 3 inchs of freeplay from the forward position, check every 125 hours. just above the drawbar are 2 square covers. these are the adjustment access doors. loosen locknut and turn adjusting nut until correct free play is achieved. tightn locknut without moving adjustment ( hopefully ). this is a piece of cake unless you have winches or rippers back there.😈 there is plugs under the tractor for draing excess grease/oil which find their way there. they can be flushed out, but on initial flush, do not relase the clutches as bad things get on the discs. flush as many times as it takes to make them clean and dry. hope this helps me out of room😆

I don't know where your getting your info from but all the 17A's have steering clutch boosters.......referred to as "Steering Clutch Hydraulic Control Mechanism"

Better check yours, it's probably needing some attention.

I AM GETTING MY INFORMATION FROM THE CAT SERVICE, PARTS AND OPERATING MANUELS FOR MY 17A. I WILL NOT SAY THAT I AM RIGHT OR WRONG, BUT I DO NOT SEE ANY BOOSTER ON MINE. I THINK GOD USED IT WHEN HE BUILT THE EARTH , BUT I AM MORE THAN WILLING TO ADMIT I AM WRONG IF I AM. I DO NOT HAVE ALL THE EXPERIENCE OTHERS HAVE HERE, BUT SINCE CAT PRINTED MY MANUELS AND THEY ARE FOR MY MACHINE SERIAL NUMBER, I DEFER TO THE YELLOW GODS..................:deadhorse::noidea::noidea:

I AM GETTING MY INFORMATION FROM THE CAT SERVICE, PARTS AND OPERATING MANUELS FOR MY 17A. I WILL NOT SAY THAT I AM RIGHT OR WRONG, BUT I DO NOT SEE ANY BOOSTER ON MINE. I THINK GOD USED IT WHEN HE BUILT THE EARTH , BUT I AM MORE THAN WILLING TO ADMIT I AM WRONG IF I AM. I DO NOT HAVE ALL THE EXPERIENCE OTHERS HAVE HERE, BUT SINCE CAT PRINTED MY MANUELS AND THEY ARE FOR MY MACHINE SERIAL NUMBER, I DEFER TO THE YELLOW GODS..................:deadhorse::noidea::noidea:

[attachment=8804]D7 17A DOZER 002.JPG[/attachment][attachment=8805]D7 17A DOZER 003.JPG[/attachment] SINCE THERE HAS BEEN LITTLE OR NO DEMAND, HERE IS SHOTS OF MY DOZER SNOOZING. THE REAR SHOT MAY TELL THE TALE. IF I IS WRONG I WILL FREELY ADMIT IT. AFTER ALL, WHAT GENTLEMAN WHOM IS MARRIED, HAS NOT BEEN PROVEN WRONG ON A SOMETIMES DAILY BASIS😆