D19D turbo problems

I was servicing my D19 tonight and noticed oil leaking out of the intake tube onto the starter. I pretty well knew what that meant so I pulled the tube to looks closer. Sure enough, the turbo is leaking oil into the intake. Looks like it's time for a rebuild.

Where can I get the parts to rebuild the turbo or is it just as well to swap it out with a rebuilt one? My I&T manual gives a pretty detailed writeup on the rebuild but I've never actually rebuilt one. The manual does say you can rebuild the later turbos without special tools and my tractor is a '64 so I assume it has the later syle. I looked it up on the AGCO parts book website and they only list the complete turbo and no rebuild kits.

On a side note, I'm starting to remember why I sold the last D19D I had. Seems like when I get one thing fixed something else fails.


Edited by m16ty - 22 Nov 2011 at 10:13pm

I'm not even seeing the individual parts listed in the parts book. All I saw was the complete turbo. I'll look again.

Edit- I went back and looked and found the parts breakdown. Now the only question that remains, how hard is it to rebuild the turbo?


Edited by m16ty - 22 Nov 2011 at 10:41pm

After some research I'm finding out that the turbo is a Air Research TO4B80. Is this correct? 

My 64 has a Thompson and I think my early two have Ray-Jay's? I'd have to look again for sure. Funny thing is all three of my running 19's each have their own sound. 

Better off to send it for rebuild, they will balance and verify all the pieces are functional to get the most out of the unit.  The fan sections could also be degraded and they will have people that can determine how bad and if need replacing.

Don(MI) wrote: I actually bought a new air research, and put it on.   Didn't like the sound, not much whistle. Ended up going back to the original Rayco, off the second engine. Long story..   I see michigan turbos ads all the time. Seems like they should be able to help on the rebuild.

If it is a Rajay,Thompsonor or TRW, it will leal some oil in the intake. This is common on these turbos.

How much side to side play in the shaft is too much? I've got another Air Research but the side play seems excessive. The blades will almost hit the housing when you wiggle it.

The takeout turbo I'm going to look at came of a M2. The guy that has it rebuilt his 2900 engine in the M2 and thought the turbo in question had too much side to side play in the shaft so he ordered a new one. When he got the new one in it had just as much side play as the old one. He went ahead and installed the new one so the old one is available.

This has been 35 years ago, but I thought the AirResearch replacement was the same as an old 190XT, with the engineering thinking of it doesn't provide very much boost pressure, as that engine has enough head gasket issues anyway.

The TRW or Rayjay was a little different on the d19 vs the 190  HOWEVER the Air Reseach was the same.   The Rayjays or TRW's had two different center sections, one had a sacrew in fitting for the drain and the other had a 2 bolt flange similar to the AirResearch.    I do not remember any D19's with factory AR turbos.  There was  a "kit" to install a AirResearch on the D19 as the TRW/RayJay went thru some tough times.  The kit required changing the intake tube and feed line and drain line.   As stated unless the D262 is torn down, raise the sleeves ( factory specs state below deck level but this will NOT hold a head gasket) to a 2 or 3 thous stand out and make sure block and head are straight it is a 99% chance you get to see these in person anyway.   We ran into many engines (long ago) that had the head planed  so much the head bolts would bottom out and torque but still leaving the head loose.   My ears still ring from straght stacks......    

Well three turbos and about 200 miles later, I'm back to square one. Picked up a used Rajay off a 190xt from tbran today but it's got the wrong return line fitting and the compressor is going to have to be disassembled for the outlet to come out in the right spot (a 190 has the intake and exhaust on either side). I was going to be too much work to get it mounted so I've decided to try and rebuild my old turbo.

 I've torn down my old TRW and now I need to look for the rebuild parts. It came apart real easy and is pretty straight forward. I just followed the instructions in the IT manual. The bearing was trash but everything else looks ok. There's a diesel shop in Nashville that I'm going to call Monday to see if they can get the parts.

a great parts source will be area diesel in carlinville IL. I think they bought what was left of the trw turbo line. 1-800-637-2658.