White 2-70 Injector Service

My White 2-70 has smoky exhaust, has a kind of "wet" appearing stack and I believe could even be getting a little diesel in the crankcase. All this leads me to believe I have an injector that is leaking. I purchased a 1655 shop manual that describes process of removing and servicing injectors. It also mentions an injector tool and cleaning kit. So now I have a number of questions.

1. Do I really need all these tools?
2. The manual mentions discarding carbon-dam seals and compression seals. Can I still get these and does anyone have part numbers?
3. Looks like there are also tools for reinstalling these seals.
4. Seems like I have seen replacement injectors for sale around $60.00 dollars, does it even make sense to try and work on these injectors or are they inexpensive enough to just replace.
5. Can you get the injectors out without removing the exhaust manifold?
6. If buying the tool kit is necessary, where can I purchase?
7. Should I just remove all of them and have them tested or is there a way to figure out which one is giving me trouble without disturbing the others.
Any advice on this would be great.
Looking forward to getting this old tractor to running better.

If you are going to be using the tractor I would replace them all. They are not that expensive and if one is bad the rest have probably used up most of there life. If you get new ones they will already have the carbon seal and the compression seal on them. This tractor uses pencil type injectors and in my experience are not rebuildable. You can tell where your bad one is a couple of different ways the first is start the engine and feel each exhaust port on the manifold the bad cylinder will have a cold exhaust runner at first or you can loosen each line one at a time and listen for the bad cylinder. The only tool you will need is a small bristle brush that you can stick down the injector hole to clean the carbon out. Make sure you replace all the fuel return T"s. I like to put small hose clamps on the T"s where they fit onto the return tubes but do not tighten them to tight or you can crush the tubes. You can still get the compression seals and carbon seals if you decide to reuse some of them. The carbon seals will stretch over the injector . Be careful not to overstretch them and give them time to shrink back down. As far as the exhaust manifold goes I would just take it off it is so much easier to get to the injectors and clean the bores.

I would first be asking whether the tractor is ever worked hard, whether the operating temperature is acheived, what the oil consumption might be, whether the cylinder compression is adequate for proper ignition and maybe a few more questions, all of which may mean a spend on injectors would not achieve a good fix.

By all means check it out to see if the problem is just one or two injectors/cylinders to narrow down the checks. Just don't jump at changing injectors for no good reason.

So my reply is: Do you really need new injectors or whatever?

How does it run under a load, or does it idle a lot? Injectors may be OK, but the pump drive shaft pilot tube may have seals leaking by the groove worn inside the tube, and a new one needs epoxied in place. If the injectors are checked and are OK, the carbon dam seal tool can be made from an inkpen lower half to streach the seal enough to install on the injector. Make sure the top compression seal is on first though. Most pencil trouble is high return fuel past the needle piston, if any are like that they need replaced.

If you plan on testing them and reinstalling then you need a puller or you will bend them. OTC makes one. No one repairs them around here as new ones are cheaper than burning up shop time.

The tractor does get used for a lot of light work, but a couple of weeks ago I worked the snot out of it for a few hours with no real change. There is no oil consumption to speak of and it does come up to operating temperature. I am going to take the exhaust manifold off, fire it up and see what I can find.

Thanks for all the great information