I'm not saying that it is your problem, but I'll tell you a little story about Injector pump timing that will make a few guys in the know nod their head.
I have an 806 diesel. I've had it for 5 years and it was always a bear to start at anything below 60 degrees. When I got the tractor, I had to have the roosa master pump rebuilt due to the plastic governor ring inside going bad. A friend with a pump shop did it for me. He told me, "It's all new inside, with all the updated parts available." Well, I timed it as it should be for a d-361, and all was well except having to have ether handy below 60 degrees (or 3 hours of block heater.) Well, fast forward 4 years, and questions on here and to friends more knowledgeable than me. Some said to check your pump timing, it'll make all the difference. I figured, I knew it was right, I did it. And I checked it on a few occasions. Well, I was looking through my service manuals one day (I have the 361 and 407 diesels service manual) and it said that there are different timing specs for d-361 and d-407 diesels, and if d-407 pumps are used on d-361's, to set them at d-407 timing (about 2 degrees advanced IIRC.) Well, I thought, My pump has "All the updated parts", which may include a d-407 advance mechanism, so let's try timing to the d-407 spec. I didn't notice anything different at first, it was summertime. When fall and winter hit, what a difference! It starts much better in the cooler weather (I still plug it in if I know I need it below 45 degrees or so, to plow snow, etc.)
Moral of the story: That 2 degrees made a heck of a difference for starting when I finally figured out that it was the problem. -Andy
This post was edited by FC Andy at 15:42:42 10/27/11.
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