Cat RD6

Tell folks where you are, then you might find there is a good ACMOC Club full of helpful folks just down the road, or suggestions of good Mechanics to work with, or avoid in your area.

They made a lot of that model tractor and many parts are still available off the shelf either new, or good secondhand, it's a matter of you deciding how much of the repairs you can handle, but I wouldn't even think about overhauling that engine till a really good Mechanic investigated the diesel leaking into the motor, as it might only be a $10 seal and a few hours labor to get her running sweet again.
Good luck, they are one of the favorite old Cats of folks here on the Forum.
regards
Mike

The Altorfer Cat dealer in Hannibal, Missouri (USA) has an excellent used parts department. If you decide to call ask to talk with Bill he is very knowledgeable and must also be a doctor because he has a lot of patients also. The number is 573-221-8600.

I would try talking to the mechanics or "Technician" as the dealership calls them. Alot of those young guys don't know what a Pony Motor is and have a hard time working on something if they can't plug a computer in first. You would be farther ahead following Mike's advice to post your hometown to see if there is an ACMOC neighbor not too far away. Then if you do find an actual equipment engine mechanic to rebuild it, discretely ask if he does work on the side. He will make out better and it will definitely be cheaper for you.
Jeff

We need to know your geographic location in order to suggest parts sources and other Cat collectors.

There we go, didn't see that I forgot my location in my profile. I'm from Lynd, MN which is right next to Marshall but nobody knows where Lynd is.

I would try talking to the mechanics or "Technician" as the dealership calls them. Alot of those young guys don't know what a Pony Motor is and have a hard time working on something if they can't plug a computer in first. You would be farther ahead following Mike's advice to post your hometown to see if there is an ACMOC neighbor not too far away. Then if you do find an actual equipment engine mechanic to rebuild it, discretely ask if he does work on the side. He will make out better and it will definitely be cheaper for you.
Jeff

[quote="drujinin"]I would try talking to the mechanics or "Technician" as the dealership calls them. Alot of those young guys don't know what a Pony Motor is and have a hard time working on something if they can't plug a computer in first. You would be farther ahead following Mike's advice to post your hometown to see if there is an ACMOC neighbor not too far away. Then if you do find an actual equipment engine mechanic to rebuild it, discretely ask if he does work on the side. He will make out better and it will definitely be cheaper for you.
Jeff[/quote]

I'm guessing you forgot a "not" in there, Jeff? Also, I'd be real careful about asking Cat dealer techs about moonlighting, a guy I know that works at Cat got called on the carpet & severely questioned when he bought a thermostat for a Cat-powered grain truck his dad had borrowed from the neighbor...he seriously thought he was gonna lose his job...they are REAL touchy about moonlighting...although it may be different when it's something like an RD6 that they don't want to mess with anyway...

It might need rings, or it might be like every other old Cat on the Planet that sat around with the main motor idling for hours and just needs to be hooked to a big plow or log and run flat out for a few hours, that cures "slobbering" or that unburnt fuel problem you are talking about. The boys here are spot on about finding an old Mechanic to work on your tractor, avoid the young guys unless they own a couple of old Cats themselves.

I'd suggest you pull the injectors and take them to a good old boys repair shop for testing and cleaning, and while they are out put half a cup of oil into each cylinder to start soaking the piston rings and help seal them up, and pull the rocker cover off and check your valve gaps, and pull the aircleaner base off and check it's not full of water, my RD6 had that problem. Work that main motor hard for a day before tearing it apart is my advice unless your surname is Rockerfeller, Hughes or Hilton.😆
Good luck
Mike

Thanks mike, that sounds more like what i want to hear. I am prepared to pull the motor apart in-frame but that isn't really what I want to do. There is a tractor salvage yard about 45 minutes away from here that rebuilds injectors and can test them, or should I take the injectors to Zeigler Cat right here in town? I know a few of the mechanics at Zeiglers pretty well. I still need to figure out why the block is filling up with diesel though. Is there some kind of seal or "seals" on the injector pump that would allow the fuel supply to flow into the block? I have a couple maintenance books for the Cat "RD" series so i'll look for the valve lash specs in there.