As the followers of this forum know I am constantly messing with my tractor. This may get long but is not required reading. As stated before my 2002D was a Vietnam refurb and has dealt great misery in the past but been reliable for some time now. However, it has never run quite as cool as others that post on here. Without going into all the things I have done to the cooling system you will just have to believe me when I say the cooling system is in good condition. In the mid to upper 90 temperatures my tractor will run at about 5/8 of the way on the gauge when pulling a good load.
Now on to what I have done. Under the trouble shooting section of the repair manuals injection timing is listed as a possible cause. So I went through the timing check as shown in more than one manual. I don't know about other models but the timing marks on my 2002d crankshaft pulley and the mark on the timing cover are a good 2" apart. Rather hard to tell when they are actually lined up. Best I could tell my fuel started out at about top dead center instead of the prescribed 21 degrees BTDC. I pulled the pump, it had .020" worth of shims. .004" is suppose to change timing 1 degree. I took all .020" out, put a thin coat of rtv on the surfaces and bolted it up. I don't know how many of you have done this timing procedure but moving the crank very slowly and knowing exactly the degree the fuel starts out is not an exact science. I still think I am injecting a tad late but much closer then it was.
Now the results: Tractor temperature stayed right at the half way mark so did run cooler. Final determination is not in but I believe I gained horse power.
Now the bad news. When I removed my pump to access and remove the shims I found the pump housing broken where the plunger guide is at on #3 cylinder plunger. No doubt it has been broken for a long time. It is scary looking but when I came in and saw the price of a new pump is close to $600 that was even more scary.. All the cam lobes showing some wear but I wouldn't think is unusual for 31 years old and over 3300 hours. In any event I am going to run it and hope it doesn't crater and tear something else up.
Took some pictures of the pump and one shot looking down in the pump opening and one looking through the inspection plate opening. Hope some of you find this interesting. Next to last picture is the scary one.
Now on to what I have done. Under the trouble shooting section of the repair manuals injection timing is listed as a possible cause. So I went through the timing check as shown in more than one manual. I don't know about other models but the timing marks on my 2002d crankshaft pulley and the mark on the timing cover are a good 2" apart. Rather hard to tell when they are actually lined up. Best I could tell my fuel started out at about top dead center instead of the prescribed 21 degrees BTDC. I pulled the pump, it had .020" worth of shims. .004" is suppose to change timing 1 degree. I took all .020" out, put a thin coat of rtv on the surfaces and bolted it up. I don't know how many of you have done this timing procedure but moving the crank very slowly and knowing exactly the degree the fuel starts out is not an exact science. I still think I am injecting a tad late but much closer then it was.
Now the results: Tractor temperature stayed right at the half way mark so did run cooler. Final determination is not in but I believe I gained horse power.
Now the bad news. When I removed my pump to access and remove the shims I found the pump housing broken where the plunger guide is at on #3 cylinder plunger. No doubt it has been broken for a long time. It is scary looking but when I came in and saw the price of a new pump is close to $600 that was even more scary.. All the cam lobes showing some wear but I wouldn't think is unusual for 31 years old and over 3300 hours. In any event I am going to run it and hope it doesn't crater and tear something else up.
Took some pictures of the pump and one shot looking down in the pump opening and one looking through the inspection plate opening. Hope some of you find this interesting. Next to last picture is the scary one.