Runaway Engine

[440roadrunner]

Detroits, at least the old ones, had a big huge mechanical door in the blower/ intake that you could slam shut with a cable in case of runaway. Some diesels can do this if they get too much fuel --or oil --where it can be sucked into the intake. I don't know anything about your tractor or your problem, but I'd sure as HECK figure a way to plug the air intake TIGHT until you get this nailed.

 

[Eagleview]

Yeah, that's the part that doesn't make sense. Everything was working fine before I started trying to fix the steering.

All I did, was remove the dash enough to get at the steering motor, took that out, put it back in, and now it does this... maybe it's all a coincidence. It doesn't seem like anything I touched should have any effect on the engine.

Are you able to post a picture of the injector pump and linkage ?

I'm still thinking that the linkage has been pulled and the bell crank lever or similar has gone over the knot and is working back to front now .

The fact that the governor is working means that it is not running on oil .

 

[LAWALLSTRACTOR]

I would remove the injection pump and have it checked and calibrated, I will bet that will solve your problem. If one of your linkages got pulled on a little to hard, when you were working on it, it could have knocked the pump out of calibration. Don't forget that if you remove the pump, you will have to be able to retime it, and if you are not able to do that have a mechanic work on it. Good luck!

 

[Diamondpilot]

Is it possible you criss-crossed the throttle and shut off linkages?

Chris

 

[KWentling]

You need to post this in the Case forum over at Yesterdays Tractors. There are a few very sharp Case guys over there. That's the first place I would try. The only thing I know about a 1690 is they are of David Brown lineage and not well thought of. I considered one until I did some research. I don't know the set up but I would guess you have a sticking spool in a divider or priority valve. I have no idea on the runaway but I would be looking at anything you might have disturbed. If it ran fine before I wouldn't think it could be anything with the injection pump other than linkage related unless maybe the rack itself is stuck.

Kim

 

[tugboat-2]

I would go with the fella from Orstrya,...and carefully "post-mortem" the idea that all was fine BEFORE you worked on it! I don't believe in coincidence and would seriously check everything you even breathed on during your steering work. It has to be connected somehow!!! Good Luck!!
. . tug

 

[banjodunn]

G'day the easiest way to check a linkage problem is to disconnect them at the pump and see what happens if it runs fine then you will have to work your way back to the dash if it is still no good then the scroll in the pump has prob jammed ( maybe by getting pulled to WOT whilst not running) if this is the case then you will have to pull it off and get the pro's to have a look. Best of luck



Jon

 

[doorstop]

I had a runaway problen that was because fuel had leaked into the crankcase from the leakoff manifold leaking. I had to remove the aircleaner and plug it to stop thr emgine.
Diesels will run on any kind of oil or fuel amd can even be started backwards if stalled and then motored backward by gravity.
But I would check the wiring since the panel was moved. Old wiring doesn't like to be moved.

 

[David-Davies]

Before you remove the pump, aline your timing marks. If your lucky you'll have a timing window on the injector pump. Unlike cars and trucks, you may have to turn the engine over ten times to get the timing marks on the gears to line up.
Dave

 

[Eagleview]

How did you go Ben ? Our curiosity is off the chain .