AC 175XTD for sale 2024

i am all for doing swaps , i am sure when its done it will look like it was meant to be there , also if the projects are done right you end up with somthing much better than when it was new

Power steering on D-17 III and older is not that bad to do. I've mounted a steering control orbitrol unit under the fuel tank (from a 170-200) and then connected it to an orbit motor that is connected to the manual worm steering gear in the front support. Works very well. The series 4 D-17 gas and older 170/175 won't let the engine sit flush to the bellhousing. So, that 1 inch spacer causes all kinds of power steering issues if you want to keep it looking relatively stock. On the later 170/175 they did have the power steering ram on the front axle tie rod, so there is no issue. The early/older 170/175's are not like that and have a steering cylinder that is horizontal to the engine at the right front corner of the engine, which there is no room for. Making a sideways steering cylinder connected to the tie rods would be a challenge the way the front axle is designed on the older 170/175's.

 D Series,  That depends on which series your talking about, the earlier or the later... The later 170/175 had the cylinder on the tie rod which eliminated the cylinder along the frame.

I have always wondered if the pto speed could be slowed down on the 175 tractor. The pto is turning 665 rpm at 2000 engine rpm and that is very fast. Could that be slowed down by putting in gears from a different AC tractor? The D19 also was rated at 2000 engine rpm and the pto was slower, 605 if i remember correctly.

https://www.youtube.com/watch?v=ElYN5l1ocfg

All the One-Seventy's and 175's prior to 2053 (??) had a SIMILAR power steering cylinder (inside the right side frame) to a series IV  D-17. It is smaller in diameter and moved forward as compared to the D-17 ( longer wheelbase). I'm guessing it butts up very close to the right front corner of the Perkins engine, but not past it. It does run alongside the oil pan on the G-226 gas engines. It is small enough in diameter and more forward to where you can pretty handily remove and replace the oil pan on a gas engine. D-17 moocho more difficult by comparison.  It is this side mount cylinder that causes issues with the 433-TI swap, as the 433-TI engine is longer than a Perkins !!  so I think there would be interference.  Anyway, the later tractors do have the crossways ram on the tie rods making the engine swap to 433-TI easy.

It would have been 38 to 40 degrees that day, and if anyone knows how those little engines start, that was a pretty darn good first start with a fresh OH and bleed on the injection pump.  Mine is 62 on SOME days !!!   Out of the wind is huge for me.

Great Thread and Nice work!  ~ Orangeman

What a BEAST the Dr is forming in his laboratory! Incredible!

Got a little more done yesterday. You can see the 3 inch offset in the turbo. Turning it around gets it inside the hood lines so no need to butcher the hood. Raising it up an inch is then needed to clear the injectors. The exhaust elbow I'll have to fabricate as this one comes out almost in the center of the hood, which is unacceptable. Intercooler gets to stay !! I can make room after all !!

would the later version manifold made the turbo fitting easier? It slopes away

DrAllis wrote: Got a little more done yesterday. You can see the 3 inch offset in the turbo. Turning it around gets it inside the hood lines so no need to butcher the hood. Raising it up an inch is then needed to clear the injectors. The exhaust elbow I'll have to fabricate as this one comes out almost in the center of the hood, which is unacceptable. Intercooler gets to stay !! I can make room after all !!

Looks great DrAllis. Very nice arrangement of exhaust manifold/turbo/intake tube/intercooler. In order to relocate exhaust pipe out of hood in a more favorable location, would rotating the turbo's exhaust exbo outward (like 1/4 turn, if thats possible?) help before doing any fabrication to it upward direction?


Edited by AC7060IL - 03 Dec 2023 at 3:56pm

Edited by coggonobrien - 18 Dec 2023 at 8:52am

Well you got the exhaust snaked around nicely!