I have 2 D21 in need of help!

Welcome to the forum.

No need to swap engines, they are the same except for some bolt on stuff.  If you overhaul them, and add a few ponys to the pump you will have an entirely different tractor.  If memory serves the series II were PTO rated around 120hp, you can safely get more, don't be stupid, but a reasonable amount is ok, I think ours is putting out somewhere around 150-160 at the pto.  She never runs hot, and except for one item, I don't think we have ever had rear end problems.

Dean did you get lost?  :-)

The tractors we used for implement field testing were always power checked at our engine lab as they came off the line and again before they were sent to Texas for winter testing.  More than a few D21's had 140+ PTO hp with factory settings after a little break-in.

That should pull a 12 row planter quite nicely.

427435 wrote: The tractors we used for implement field testing were always power checked at our engine lab as they came off the line and again before they were sent to Texas for winter testing.  More than a few D21's had 140+ PTO hp with factory settings after a little break-in. That should pull a 12 row planter quite nicely.

Dad swears our D21 is a demonstrator, my great grandfather was an allis dealer, and it was sold by him, but not to us first, so we can't be sure it wasn't tuned by someone else after leaving allis.  But it has always given our 7060 a run for the money, with any impliment.  I actually prefer the 21, but like the air conditioning of the 7060 a bit more.  I would imagine that the parasitic losses to the power shift tranny and the Air conditioner, actually brings the stock 7060 rear wheel HP down below a 150 PTO HP D-21???

I'm glad to hear all your responses.  I guess from what I"m hearing I don't need a different engine I just need to turn this one up a little.  any suggestions or how toos? They both need overhauls one way or the other. I did a compression check on the 68 and none of them went over 200 PSI and the spec was 400 PSI @ 150 rpms the 64 has a spun rod bearing so it's going to get broke down either way. Dean thanks for the photos. That looks like some pretty flat dirt up there you have, must be nice. I know the FWA helps alot. We pulled the planter last year with a ford 8830 with fwa and it did fine, but needed to to put down NH3 the same time we where planting so we got the d21's (that and I've always wanted one) would that 8030 handle another 8 rows? ours has a total of 24 no-till units in the ground when doing bean going up and down slopes that shouldn't be farmed. (rented ground) dad wanted me to ask. Thanks again for all your help everyone.

recipe: overhaul the engine, have competent pump guy do pump and injectors for you, use 7080 nozzles. I could do this for you. pm if needed. 

You're right orange that's what made me do the compression check. I went out on a cold day to fire her up and not even starting fluid would help her get going. So I pulled the nozzles and tested it and that is what led me to doing an overhauling on it. I've played with a bosch pump more then once in my dodge but not a rotary style . DanWi You're right on the weight. I weighed it before i started tearing it down and it was almost 17000 lbs without duals(agco recommended something that weighed more then 16000). It has a full weight set on the rearwheels and 6 on the front. I've already started looking for a set of duals for it. The pump is a PTO. The other hydraulics for raising and lowering the planter and markers are fast enough for it I think. PTO seems to be in good shape also. The draw bar though may have to be replaced with a case 1370 draw bar I've been told. They are suppose to be a little heavier and will take a clevis. Dad wants me to design a canopy for it of some sort. He's not to fond of the canvas ones. So all this is the winter project for this year plus painting it. This year at our county fair AC is the featured tractor and it's suppose to lead the parade I've been told. Thanks once again for all the in put.

Matters were you are in IL. but talk to Neil Evans at Northside Salvage. He is in Red Budd IL. He is a wealth of knowledge and might be able to help you out.

We pull a 19 row white 6100 no-till (old 8r38" converted to 10 r 30" w a splitter) with an AGCO RT130.  Power seems to be fine, but get stuck on sand hills.  I had to plant a steep (D grade) sand hill down hill, luckily other side of field was flatter.  I went south on hill (downhill) and drove to flatter part and headed North.  If you plan on planting steep hills, you may want something with FWA, as even the differential lock didn't help.  We were running duals also, but not a lot of weight.  Soil type matters, if hill had more clay we would have been fine.