ironhorsemike

The shaft in the left side (camshaft side), of the pump moved freely side to side, about one inch total.  It is connected to the governor in the right-side housing and controls how big a shot the injectors get.

When the shaft is far left, it's full delivery; far right is complete injector shut-off.

So it's far left with engine off or being started, but in my case, it pulls clear to the right when the engine catches and starts up.  Which immediately cuts off the fuel going to the injectors.

I held a screwdriver to prevent the shaft from moving all the way right, and the engine started up and kept running.  If I held it all the way to the left, I would likely cause it to overspeed.

The metal pieces in the bottom of the left housing (camshaft), were thin and mangled.  Tommy guessed they were shims used to calibrate the pump shots.

I'm about to remove the whole injector pump and see if I can fix whatever is wrong on the governor side. but my hopes of success are fading and have just about resigned myself to getting a new $500 pump.  Not a huge deal, and Tommy and Harold deserve some business for all the free phone time they've spent with me.  I just won't have the satisfaction of getting to the component-level root cause and fixing it myself.  

Thanks David and Bob for your input.  Yes, the air intake is one of the first things I checked and it's fine.

Rich, Tommy was away but I had a couple pleasant and informative chats with Harold at Affordable.  He's very familiar with that engine.

Here's where I am as of today:  pulled all three injectors, one at a time.  Swiveled the pipes around and all three are now out away from the engine.  When I crank the engine with the starter, all three puff out a little blast of finely divided mist, 1-2-3 in sequence.  From what I read and see on-line, this is how it should behave.  Of course, I cannot tell if they are timed right by just doing this.

Before I re-install the injectors into the block, can you think of anything else I might try while they are out?  Again, it died suddenly while I was backing up the other day, and now only coughs to life for a short moment when trying to start.

I do appreciate any guidance and insights anyone may have and realize how difficult it can be to diagnose problems this way or over the phone.  Thanks again.

The previous owner of my Iron Horse had a lot of tractors and implements on his property and came recommended from another guy with tractor experience.  But his advice had me wondering??

I found this link       (Rocky Mtn.), while searching for Jinma info, and its pix and descriptions matched what my Iron Horse looks like.  I guess that's where my confidence in their recommendations came from.

Draining my front axle of hydraulic fluid seems straightforward enough, but should I be concerned about the ATF that remains in the loader lines and cylinders after I've drained the reservoir?

Thanks again for staying with me on this, Bob.  I do appreciate your input.    Mike

Many thanks Rich and Bob.  All your info is duly recorded in my tractor notebook.  My $15 membership in CTOA is already paid off.       Mike